Document:

Exhibit 10.3

 Exhibit 10.3 

Confidential treatment has been requested for portions of this exhibit and such portions have been filed separately with the Commission. The copy
filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	  

AMENDMENT 4

  

 AMENDMENT 4 TO 

CONTRACT 

BETWEEN 

TERRESTAR NETWORKS INC. AND HUGHES NETWORK SYSTEMS, LLC 

FOR DESIGN, DEVELOPMENT AND SUPPLY OF 

SATELLITE BASE STATION SUBSYSTEM (S-BSS) 

This Amendment 4 to Contract (the “Amendment”) is made as of July 16, 2009 (the “Amendment Effective
Date” or “EDA”) by and between Hughes Network Systems, LLC (the “Contractor”) with its principal place of business at 11717 Exploration Lane, Germantown, Maryland, 20876, and TerreStar Networks Inc., a
corporation organized under the laws of Delaware with its principal place of business at One Discovery Square, Suite 600, 12010 Sunrise Valley Drive, Reston, Virginia 20190 (“TerreStar”). As used herein, Contractor and TerreStar may
each be referred to individually as a “Party” and collectively as the “Parties.” 
 WHEREAS,
TerreStar has contracted with Contractor for the design, development and supply of an S-BSS and related Deliverable Items under the contract between the Parties titled “Contract Between TerreStar Networks Inc. and Contractor for Design,
Development and Supply of Satellite Base Station Subsystem (S-BSS),” dated February 6, 2007, as amended by that certain Addendum and Amendment to Contract between the Parties dated April 13, 2007, and as further amended by that second
Amendment to Contract between the Parties dated August 1, 2008 and that third Amendment to Contract between the Parties dated March 9, 2009 (collectively the “Contract”); and 

WHEREAS, the Parties desire to amend the Contract to revise the Milestone schedule and payment plan as set forth herein.

 NOW, THEREFORE, in consideration of the mutual covenants and agreements contained herein and intending to be legally
bound, the Parties hereby agree to the following: 
 I. The Contract is hereby amended as follows: 

1. Deleted Exhibits. On the Amendment Effective Date the following Exhibits to the Contract shall be deleted in their entirety and replaced with
the revised versions of such Exhibits which are described in Article I-2 below and which are attached to this Amendment: 
  

	 	(a)	Exhibit A – S-BSS Statement of Work; 

  

			
	
	 This Amendment and the information contained therein are confidential and proprietary to
TerreStar and Contractor and shall not
 be published or disclosed to any third party except as permitted by the Terms and
Conditions of this Amendment and the Contract.

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4

  

	 	(b)	Exhibit B – S-BSS Functional Requirements 

  

	 	(c)	Exhibit C – S-BSS Price and Payment Milestone Schedule; 

  

	 	(d)	Exhibit A2 – TerreStar Satellite Chipset Statement of Work; 

  

	 	(e)	Exhibit B2 – TerreStar Chipset Functional Requirements 

  

	 	(f)	Exhibit C2 – TerreStar Chipset Price and Payment Milestone Schedule. 

2. Replacement Exhibits. The following Exhibits, which are attached to this Amendment, shall replace the corresponding Exhibits described in
Article I-1 above: 
  

	 	(a)	Exhibit A, Revision 3.2 – S-BSS Statement of Work 

  

	 	(b)	Exhibit B, Revision 4.4 S-BSS Functional Requirements 

  

	 	(c)	Exhibit C, Revision 5.1 – S-BSS Price and Payment Milestone Schedule; 

 

	 	(d)	Exhibit A2, Revision 2.4 – TerreStar Satellite Chipset Statement of Work; 

 

	 	(e)	Exhibit B2, Revision 5.5 TerreStar Chipset Functional Requirements 

  

	 	(f)	Exhibit C2, Revision 3.3 – TerreStar Chipset Price and Payment Milestone Schedule. 

All other Exhibits to the Contract shall remain in full force and effect, except to the extent the same are expressly amended herein.

 3. Article 3.B (Liquidated Damages). Article 3.B (Liquidated Damages) is hereby amended to read as follows: 

 

			
	Page 2
	 This Amendment and the information contained therein are confidential and proprietary to
TerreStar and Contractor and shall not
 be published or disclosed to any third party except as permitted by the Terms and
Conditions of this Amendment and the Contract.

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4

  

 Contractor acknowledges that time is of the essence with respect to the Milestone
Schedule and timely delivery of the Work, and that if Contractor fails to meet the Key Milestones by [***], TerreStar may incur substantial damages that will be difficult to calculate. If Contractor fails to complete the Key Milestones
by [***], then Contractor shall pay liquidated damages in accordance with Article 18. 
 4. Article 5.B (S-BSS Acceptance). Article 5.B,
first paragraph is hereby amended to read as follows: 
 Provisional Acceptance Testing shall be conducted during the Operational
Verification Phase for Release 1.1, once Contractor has completed all prerequisite Work to be performed under this Contract with respect to Release 1.1 and prior Releases, and has successfully achieved all previous
Milestones for Release 1.1 and prior Releases through the end of the Technical Verification Phase (including successful completion of the “Technical Verification Review” Milestone for Release 1.1 (as described
in Exhibit A)). If at any time TerreStar places the TerreStar Network (including the S-BSS) into commercial revenue-generating operation prior to TerreStar having granted Provisional Acceptance, then Provisional Acceptance shall be deemed to have
occurred. 
 5. Article 5.C (Satellite Chipset Acceptance). Article 5.C, third and fourth paragraphs are hereby amended to read as
follows: 
 Satellite Chipset Phase 2 Final Acceptance shall be conducted during thea Phase
2 Lab Integration Test with SBSS Release 1.5, once Contractor has completed all prerequisite Work to be performed under this Contract with respect to Chipset Phase 2 and prior Releases, and has successfully achieved
all previous Milestones for Chipset Phase 2 and prior Releases (as described in Exhibit A2). 
 The Contractor is not responsible
for “Type Approvals” for the Satellite Chipset. TerreStar shall conduct Acceptance Testing in accordance with the applicable testing procedures specified in Exhibit A2 hereto. Contractor shall support TerreStar in all
phases of Acceptance Testing, in accordance with Exhibit A2 hereto. Following completion of the applicable Acceptance Testing, Contractor shall provide TerreStar with a written report specifying the tests that were performed, whether the tests were
successfully completed, and identifying any problems, defects or anomalies that were identified through such testing. TerreStar shall notify Contractor of its 
  

			
	Page 3
	 This Amendment and the information contained therein are confidential and proprietary to
TerreStar and Contractor and shall not
 be published or disclosed to any third party except as permitted by the Terms and
Conditions of this Amendment and the Contract.

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4

  

 
acceptance or rejection of the applicable Work within fifteen (15) Business Days after completion of the applicable Acceptance Testing and receipt of Contractor’s report. Should
TerreStar not respond to a the aforementioned written report submitted by Contractor for approval of the relevant Acceptance test within 15 business days, the relevant Acceptance event for the applicable Release shall be deemed to have occurred. In
the event of rejection of the Work due to failure of the Work to meet the Specifications and/or the other requirements of this Contract with respect to the applicable Release, Contractor shall promptly correct the Work and shall re-deliver the
corrected Work to TerreStar, and such Work shall be subject to further testing to verify that the problems have been corrected. The preceding process shall be repeated as necessary until all such problems have been corrected at which time, TerreStar
shall accept the Work associated with such Release in writing. Notwithstanding the foregoing, nothing herein shall limit TerreStar’s rights to pursue its available remedies (including any right to terminate this Contract for cause) in the event
that the Work is not accepted for any reason or is not accepted by the dates scheduled herein. 
 6. Article 9.D (Warranty Period).
Article 9D is hereby amended to read as follows: 
 D. Warranty Period. With respect to each Deliverable Item or Service
associated with the S-BSS Work, these warranty and support obligations shall run for a period of one (1) year from the completion of Technical Verification Review for Release 1.1 (the “S-BSS Warranty Period”). With
respect to the Chipset Work, these warranty and support obligations shall run for a period of one (1) year from Acceptance of Phase 1 (the “Chipset Warranty Period”). With respect to the
Deliverable Items or Service, TerreStar may purchase an extended Warranty as provided for in Exhibit D and D2. 
 7. Article 10.C (Key
Personnel). Article 10.C Item 2. is hereby amended to read as follows: 
  

	 	(1)	Contract Program Manager: [***] 

  

	 	(2)	Engineering Manager; [***] 

 8. Article 18.A
(Liquidated Damages). Article 18.A (Liquidated Damages) is hereby amended to read as follows: 
  

			
	Page 4
	 This Amendment and the information contained therein are confidential and proprietary to
TerreStar and Contractor and shall not
 be published or disclosed to any third party except as permitted by the Terms and
Conditions of this Amendment and the Contract.

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4

  

 A. Liquidated Damages. In the event that the relevant Key Milestone is not
completed as specified therefore in Exhibit A by [***], then Contractor shall pay liquidated damages, which are not intended to be, and shall not be construed as, a penalty, for each calendar day of delay after [***]. Contractor shall pay
TerreStar: 
 With respect to the S-BSS Work, for each thirty (30) day period after [***], liquidated damages
for each day of additional delay during such thirty-day period shall be equal to [***] percent ([***]%) of the total S-BSS Purchase Price multiplied by 1/30. 

With respect to the Chipset Work, for each thirty (30) day period after [***], liquidated damages for each day of
additional delay during such thirty-day period shall be equal to [***] percent ([***]%) of the portion of the Chipset Purchase Price applicable to Phase 1 of the Chipset Work as set forth in Exhibit C2 (the “Phase 1 Chipset Purchase
Price”) multiplied by 1/30. 
 The total accumulated liquidated damages payable by Contractor under this Contract for delays
in meeting the Key Milestone Date with respect to the S-BSS Work shall not exceed [***] percent ([***]%) of the total S-BSS Purchase Price and with respect to the Chipset Work shall not exceed [***] percent ([***]%) of the Phase 1 Satellite Chipset
Purchase Price, as such prices are adjusted by any price impact resulting from changes to the respective Purchase Price (for these purposes total Purchase Price will not include the value of any options exercised under this Contract as listed in
Exhibits D and D2). 
 9. Attachment 1 - Glossary. The following term in Attachment 1 (Glossary) is hereby amended as follows:

 “Provisional Acceptance” means, (i) with respect to the S-BSS Work, successful completion of Operational
Verification Testing for Release 1.1 (ORR Milestone), and (ii) with respect to the Chipset Work, successful completion of Satellite Chipset Phase 1, Release 1 Operational Verification Testing (ORR Milestone). 

II. Capitalized terms shall have the meaning ascribed to them in the Contract, and the related Exhibits and Glossary attached to the Contract, as may be
amended by this Amendment. 
  

			
	Page 5
	 This Amendment and the information contained therein are confidential and proprietary to
TerreStar and Contractor and shall not
 be published or disclosed to any third party except as permitted by the Terms and
Conditions of this Amendment and the Contract.

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4

  

 III. This Amendment and the Contract together constitute the entire agreement and understanding between
the Parties in connection with the transactions hereby contemplated. This Amendment supersedes all previous agreements, arrangements and understandings between the Parties with regard to such transactions. Except as specifically amended in this
Amendment, the Contract remains in full force and effect, and is ratified and confirmed. 
 [SIGNATURE PAGE FOLLOWS]

  

			
	Page 6
	 This Amendment and the information contained therein are confidential and proprietary to
TerreStar and Contractor and shall not
 be published or disclosed to any third party except as permitted by the Terms and
Conditions of this Amendment and the Contract.

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4

  

 IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be executed by their duly
authorized representatives as of the day and year first above written. 
 ACCEPTED: 

 

									
	TERRESTAR NETWORKS INC.	  		  	HUGHES NETWORK SYSTEMS, LLC
					
	By:	  	  
	  		  	By:	  	  

			
	Typed Name: Vincent Loiacono	  		  	Typed Name: Matthew Mobebbi
			
	Title: Chief Accounting Officer	  		  	Title: Vice President
			
	Date: July 15, 2009	  		  	Date: July 16, 2009

  

			
	Page 7
	 This Amendment and the information contained therein are confidential and proprietary to
TerreStar and Contractor and shall not
 be published or disclosed to any third party except as permitted by the Terms and
Conditions of this Amendment and the Contract.

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 Exhibit B 

Satellite Base Station Subsystem (S-BSS) 

Functional Requirements 

TSN_SAT_2_REQ-Satellite Base Station Subsystem Functional Requirements 

 

			
	Version 4.4	 	June 11, 2009

  

			
	Hughes Network Systems, LLC	 	
	11717 Exploration Lane	 	
	Germantown, Maryland 20876	 	  

  

			
	TerreStar Networks, Inc.	 	
	One Discovery Place	 	
	12010 Sunset Hills Road, 6th Floor	 	
	Reston, Virginia 20190	 	  
 Vincent Loiacono, Chief
Accounting Officer

  

This document contains data and information proprietary to TerreStar Networks Inc. This data is being
furnished pursuant to the provisions of the Contract between TerreStar Networks Inc. and Hughes Network Systems, LLC for the TerreStar Satellite Base Station Subsystem. Hughes Network Systems, LLC and TerreStar Networks Inc. shall have the right to
duplicate, use or disclose the data and information to the extent specified in the Contract and herein. 

  

			
	Exhibit B	  	 Version 4.4

6/11/09
 Page 1 of 33

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

Information included in this Exhibit may contain technical data controlled by the
Export Administration Regulations (“EAR”) and/or the International Traffic in Arms Regulations ("ITAR"). This document has not been cleared for export or transfer to a Foreign Person or foreign entity. 

 

			
	Exhibit B	  	 Version 4.4

6/11/09
 Page 2 of 33

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 Revision History 

 

							
	 Date
	  	Version	  	 Description
	  	Author
	 1/31/07
	  	3.3	  	Initial Release/Contract Execution version	  	[***]
				
	 1/31/08
	  	4.0	  	Incorporate CCN 1, 2, 3, 6	  	[***]
				
	 5/15/08
	  	4.1	  	Incorporate CCN 4	  	[***]
				
	 5/17/08
	  	4.2	  	Draft for May 08 Replanning	  	[***]
				
	 6/17/08
	  	4.3	  	Final Execution Copy for Amendment 2	  	[***]
				
	 6/11/09
	  	4.4	  	Draft version for Amendment 4 with update based on comments from TSN	  	[***]

  

			
	Exhibit B	  	 Version 4.4

6/11/09
 Page 3 of 33

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 Notices: 
  

	•	 	 The S-BSS shall comply with stricter of the requirements in Section 1 through 12 and Annex 1 of this document.

  

			
	Exhibit B	  	 Version 4.4

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 Contents 
  

			
	Revision History	  	3
	1.0     OVERVIEW	  	7
	 1.1     Company Overview
	  	7
	 1.2     Purpose of This Document
	  	7
	 1.3     TerreStar System Architecture
	  	7
	 1.4     S-BSS ARCHITECTURE AND REQUIREMENTS
	  	8
	 1.5     FREQUENCY ALLOCATION
	  	8
	 1.5.1     ATC Network Air Interface
	  	9
	 1.5.2     Satellite Network Air Interface
	  	9
	 1.5.3     Satellite Network Interference
	  	9
	 1.6     FCC REQUIREMENTS
	  	9
	 1.6.1     Out of Channel/Out of Band Emissions
	  	9
	 1.6.2     ATC Satellite Sharing Requirements
	  	10
	 1.6.3     ATC Certification
	  	10
	 1.7     OPERATIONAL REQUIREMENTS
	  	10
	2.0     S-BSS INTERFACES	  	11
	3.0     SERVICES & QUALITY of SERVICE MANAGEMENT OPERATIONS	  	12
	 3.1     ServiceS
	  	12
	 3.1.1     VoIP:
	  	13
	 3.1.2     Emergency Voice Calling:
	  	13
	 3.1.3     IP Multicast and Push-to-Talk Voice:
	  	13
	 3.1.4     Data Services:
	  	13
	 3.1.5     Video Services:
	  	13
	 3.1.6     Multimedia:
	  	13
	 3.2     Handoff REQUIREMENTS
	  	13
	 3.3     Element Management Operations
	  	13
	4.0     S-BSS TECHNICAL & PERFORMANCE REQUIREMENTS	  	14
	 4.1     Radio Performance Requirements
	  	14
	 4.1.1     Transmitter
	  	14
	 4.1.2     Receiver
	  	17
	 4.2     General Performance Requirements
	  	20
	 4.2.1     Synchronization
	  	20
	 4.2.2     Spot Beam Operation
	  	20
	 4.2.3     Inter-Beam Beam C/I
	  	20
	 4.3     INTERFACE TECHNICAL PARAMETERS
	  	20
	 4.3.1     S-BSS to GBBF
	  	20
	 4.3.2     S-BSS to SGSN (Iu-PS)
	  	21
	 4.3.3     S-BSS to SGSN (Iu-BC) (P6M)
	  	21
	 4.3.4     S-BSS Clock Stability
	  	21

  

			
	Exhibit B	  	 Version 4.4

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 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

			
	 4.3.5     VLANs, GigE and Routing (TBR by PDR)
	  	21
	 4.4     Physical and Environmental Requirements
	  	22
	 5.0     S-BSS Radio Resource Control Requirements
	  	23
	 6.0     Prioritization and Pre-emption Support
	  	24
	 7.0     Power Control
	  	25
	 8.0     Network Management
	  	26
	 8.1     Fault Management
	  	26
	 8.2     Configuration management
	  	27
	 8.3     Performance and Usage Statistics Collection
	  	27
	 8.4     security and Access Management
	  	27
	 9.0     Narrow-Band Beam Forming (NBBF) (ICD+o3M, ICD shall be delivered by TSN EDC+2M)
	  	28
	 10.0     Two-Satellite Diversity
	  	29
	 11.0     Single Antenna Interference Cancellation (SAIC) (P6M)
	  	29
	 12.0     MIMO (Alamouti Scheme) (O3M)
	  	29
	 13.0     Annex 1- GMR-3G Reference and Requirements
	  	30
	 A.     GMR-3G Physical Channels
	  	30
	 B.     Logical Channels
	  	32
	 14.0     Annex 2 – Schedule of Feature Releases
	  	33

  

			
	Exhibit B	  	 Version 4.4

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 1.0 OVERVIEW 

1.1 COMPANY OVERVIEW 

TerreStar Networks Inc. is a Reston, Virginia-based provider of advanced mobile communications services for the North American market. TerreStar plans to
launch an innovative communications system to provide mobile coverage throughout the US and Canada using several classes of devices from a typical handset to vehicle mounted terminals. This seamless, ubiquitous network, based on integrated
satellite/ground-based technology, will allow service in even the most hard-to-reach areas, and will finally allow for the interoperable, survivable and critical communications infrastructure that our nation’s first responders need. The
TerreStar hybrid network will provide advanced IMS based 3.5/4G communication services for government, enterprise and personal customers. More information is available at http://www.terrestar.com/ 

1.2 PURPOSE OF THIS DOCUMENT 

This document provides the functional requirements for the Satellite Base Station Sub-system (S-BSS) to provide satellite air interface radio connectivity
to User Equipments (UEs) and their connectivity to the TerreStar IP networks to provide packet switched IMS based services. 

1.3 TERRESTAR SYSTEM ARCHITECTURE 

The overall hybrid (Terrestrial and Satellite) radio access network (RAN) architecture is shown in Figure 1-1. 

 

			
	Exhibit B	  	 Version 4.4

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 

 

 Figure 1-1. TerreStar Hybrid Radio Access Network Architecture 

The RAN is composed of two radio subsystems: 
  

	 	•	 	 Satellite BSS ( S-BSS) 

  

	 	•	 	 Terrestrial RAN (ATC-RAN) 

[***] 
 1.4 S-BSS ARCHITECTURE
AND REQUIREMENTS 
 Figure 1-2 shows the system architecture with S-BSS subsystems. 

[***] 

Figure 1-2. S-BSS Segment and Gateways 

[***] 
 1.5 FREQUENCY ALLOCATION

 [***] 
  

			
	Exhibit B	  	 Version 4.4

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 1.5.1 ATC Network Air Interface 

[***] 
 1.5.2 Satellite Network Air
Interface 
 [***] 

[***] 
  

	 	Figure	1-3. Frequency Plan 

 1.5.3 Satellite
Network Interference 
 [***] 

1.6 FCC REQUIREMENTS 
 The
operation of the satellite network elements with regard to RF Spectrum issues are governed by national regulatory rulings. For operation within the US, these rulings are issued by the FCC. For operation within Canada, they are issued by Industry
Canada. Both agencies have allowed ATC operation in conjunction with MSS operation. The FCC rules pertaining to operation of the satellite network are contained in 47CFR part 25. 

1.6.1 Out of Channel/Out of Band Emissions 

The FCC rules contained in 47 CFR 25.202 must be met with respect to out of channel emissions. Specifically, the mean power of emissions shall be
attenuated below the mean output power of the transmitter in accordance with the following rules: 
  

	 	1.	In any 4 kHz band, the center frequency of which is removed from the assigned frequency of channel/band by more than 50% up to and including 100% of the authorized
bandwidth: 25 dBc 

  

	 	2.	In any 4 kHz band, the center frequency of which is removed from the assigned frequency of channel/band by more than 100% up to and including 250% of the authorized
bandwidth: 35 dBc 

  

	 	3.	 In any 4 kHz band, the center frequency of which is removed from the assigned frequency of channel/band by more than 250% of the authorized bandwidth:
An amount equal to 43 dB plus 10 times the logarithm to the base 10 of the transmitter power in Watts, i.e. 43 + 10
LOG10 [P (W)] dB 

 

			
	Exhibit B	  	 Version 4.4

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 1.6.2 ATC Satellite Sharing Requirements 

 

	 	1.	47CFR 25.149 (b) Defines the requirements for ATC and satellite sharing 

1.6.3 ATC Certification 
 47CFR 25.150
(C) (1). Equipment must be certified as set forth in 2.803. 
 47CFR 25.150 (C) (2). Equipment must comply with RF Safety as outlined
in 1.1307(b). 
 1.7 OPERATIONAL REQUIREMENTS 

[***] 
  

			
	Exhibit B	  	 Version 4.4

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 2.0 S-BSS INTERFACES 

[***] 

[***] 
  

			
	Exhibit B	  	 Version 4.4

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33

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 3.0 SERVICES & QUALITY OF SERVICE MANAGEMENT OPERATIONS 

 

 

 Figure 3-1: End-to-End QoS Model 

[***] 
 3.1 SERVICES 

[***] 
  

			
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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 3.1.1 VoIP: 

[***] 
 3.1.2 Emergency Voice
Calling: 
 [***] 
 3.1.3 IP Multicast
and Push-to-Talk Voice: 
 [***] 

3.1.4 Data Services: 
 [***] 

3.1.5 Video Services: 
 [***] 

3.1.6 Multimedia: 
 [***] 

3.2 HANDOFF REQUIREMENTS 
 [***]

 Figure 3-2: Hand-off Scenarios 

[***] 
 3.3 ELEMENT MANAGEMENT
OPERATIONS 
 [***] 
  

			
	Exhibit B	  	 Version 4.4

6/11/09
 Page 13 of
33

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 4.0    S-BSS TECHNICAL & PERFORMANCE REQUIREMENTS 

 4.1 RADIO PERFORMANCE REQUIREMENTS 

4.1.1 Transmitter 
 4.1.1.1 Output
Spectrum 
 [***] 
 4.1.1.2 Number
of Beams 
 [***] 

4.1.1.3 Carrier Bandwidth 
 [***]

 4.1.1.4 Carrier Spacing 
 [***]

 4.1.1.5 Number of Carriers Supported Per Beam 

[***] 
 4.1.1.6 Modulation 

[***] 
 4.1.1.7 Transmit Symbol Rates

 [***] 
 4.1.1.8 Transmit Pulse
Filter 
 [***] 
 4.1.1.9 Transmit
Error Vector Magnitude 
 [***] 

4.1.1.10 Transmit Power Control 
 [***]

  

			
	Exhibit B	  	 Version 4.4

6/11/09
 Page 14 of
33

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 4.1.1.11 Frequency Accuracy 

The frequency error shall be less than 10 Hz. 

4.1.1.12 Forward Error Correction Coding 
  

	 	1.	The transmitter shall support a variety of FEC rates between rate 1/3 and rate 9/10 at a minimum to support the intended traffic and control signals at
various signal-to-noise ratios. The vendor shall supply a table of the supported FEC rates with a description of the employed coding. 

  

	 	2.	The transmitter shall support an efficient FEC scheme for VoIP traffic using capacity achieving FEC codes (Turbo) with multiuser physical layer packets.

  

	 	3.	The transmitter shall support encoding of capacity achieving codes (Turbo) for all non-VoIP traffic. 

 

	 	4.	For VoIP traffic, an array of valid combinations of vocoder rate, FEC coding rate, modulation, and transmit symbol rate shall be supported. These combinations
(“code points”) shall be clearly listed. 

  

	 	5.	Similarly, for non-VoIP traffic a different array of valid combinations of FEC coding rate, modulation, and transmit symbol rate shall be supported. These combinations
(“code points”) shall be clearly listed 

 4.1.1.13 TDMA Burst and Frame Length 

 

	 	1.	The transmitter shall support a variety of different TDMA burst lengths. Table 4.1 provides burst lengths for traffic and control channels.

  

			
	Exhibit B	  	 Version 4.4

6/11/09
 Page 15 of
33

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 Table 4.1: Burst Length for Traffic and Control Channels 

 

					
	 Channel Type
	  	 Nomenclature
	  	 Burst Length

	Traffic Channels	  	[***]	  	[***]
	  	[***]	  	[***]
	  	[***]	  	[***]
	  	[***]	  	[***]
	  	[***]	  	[***]
	  	[***]	  	[***]
	Control Channels	  	[***]	  	[***]
	  	[***]	  	[***]
	  	[***]	  	[***]
	  	[***]	  	[***]
	  	[***]	  	[***]
	  	[***]	  	[***]
	  	[***]	  	[***]

  

	 	2.	The transmitter shall support a variety of different frame lengths based on symbol rate and traffic and control channels. Table 4.2 provides frame lengths for
traffic and control channels with various symbol rates. 

 Table 4.2: Frame Length for Traffic and Control
Channels 
  

															
	 Traffic
Channels

	 Channel
	 	 Modulation
	 	 Coding

Scheme
	 	 Effective

Code Rate

Approx.
	 	 BW

(KHz)
	 	 Symbol

Rate
	 	 Approx.

Net

Payload

Bit Rate

(Kb/s)
	 	 Frame

Length

(bytes)

	 [***]
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 [***]
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 [***]
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 [***]
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 [***]
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 [***]
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 [***]
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 [***]
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 [***]
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 [***]
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 [***]
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 [***]
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 [***]
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 [***]
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	
	 Common Control
Channels

	 Channel
	 	 Modulation
	 	 Coding

Scheme
	 	 Effective

Code Rate

Approx.
	 	 BW

(KHz)
	 	 Symbol

Rate
	 	 Approx.

Net

Payload

Bit Rate

(Kb/s)
	 	 Frame

Length

(bytes)

	 [***]
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 [***]
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 [***]
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 [***]
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 [***]
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 [***]
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]

  

			
	Exhibit B	  	 Version 4.4

6/11/09
 Page 16 of
33

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 4.1.1.14 RF Output Spectrum Emissions 

Spectrum Mask shall comply with FCC requirements. 

Spurious shall meet the FCC requirements. 

4.1.2 Receiver 
 4.1.2.1 Input
Spectrum 
 The output spectrum from the receiver demodulator shall consist of a 5 MHz analog baseband, quadrature sampled at a rate of
7.5 MS/s, with 16 bits/sample in each of the quadrature bit streams. 
 4.1.2.2 Number of Beams 

The Satellite Base Station shall support up to 550 pairs of beams provided proper dimensioning. Each pair consists of a RHCP signal and a LHCP
signal. 
 4.1.2.3 Carrier Bandwidth 

The individual carrier bandwidth may be 31.25, 62.5 (R2) and 156.25 KHz. 
  

			
	Exhibit B	  	 Version 4.4

6/11/09
 Page 17 of
33

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 4.1.2.4 Carrier Spacing 

The carrier spacing shall support a minimum of 31.25 kHz. 

4.1.2.5 Number of Carriers Supported Per Beam 

Each beam output shall support from 1 to 160 carriers, depending on traffic conditions and carrier bandwidth options. Not every beam will
simultaneously support the maximum number of carriers. This upper limit is derived from using all 5 MHz of a single transponder spectrum as 31.25 kHz bandwidth carriers. 

4.1.2.6 Modulation 
 The receiver
shall support as a minimum the following modulations: 
  

	 	1.	Pi/4 QPSK 

  

	 	2.	BPSK (or an equivalent option in terms of bits per symbol, e.g. Pi/2-BPSK) as specified in GMR-3G. 

4.1.2.7 Receive Symbol Rates 
 The receiver
shall support symbol rates of 23.4, 46.8 (R2) and 117 KS/s. 
 4.1.2.8 Receiver Matched Filter 

The receiver matched filter shall implement a square Root Raised Cosine shape with the roll-of factor alpha = 0.35. 

4.1.2.9 Receive Dynamic Range 
 The
receiver dynamic range per carrier shall be no less than 30 dB. 
 4.1.2.10 Frequency Accuracy 

The frequency error shall be less than 10 Hz. 

4.1.2.11 Diversity Combining 
 Each
receiver in the S-BSS shall process both polarization (RHCP and LHCP) signals from satellite return links. The user bearer data and control signals will be present on the interface between the GBBF and the S-BSS in two independent streams
representing these orthogonal polarizations. It is necessary to combine the return link signals in an optimum manner in order to maximize the Signal-to-Noise Ratio (SNR). The performance achievable under different levels of correlation between the
two polarization components shall be quantified. 
  

			
	Exhibit B	  	 Version 4.4

6/11/09
 Page 18 of
33

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 4.1.2.12 Forward Error Correction Coding 

The receiver shall support a variety of FEC rates between rate 1/3 and rate 9/10 at a minimum to support the intended traffic and control
signals at various signal-to-noise ratios. The vendor shall supply a table of the supported FEC rates with a description of the employed coding. 

The receiver shall support efficient decoding, no worse than tail-biting convolutional codes of constraint length 7, for VoIP traffic. 

The receiver shall support decoding of capacity achieving codes (Turbo) for all non-VoIP traffic. 

For VoIP traffic, an array of valid combinations of vocoder rate, FEC coding rate, modulation, and transmit symbol rate shall be supported. These
combinations (“code points”) shall be clearly listed together with the achievable Eb/No and C/N performances at the specified decoded FER. 

Similarly, for non-VoIP traffic a different array of valid combinations of vocoder rate, FEC coding rate, modulation, and transmit symbol rate shall be
supported. These combinations (“code points”) shall be clearly listed together with the achievable Eb/No and C/N performances at the specified decoded FER for corresponding traffic classes. 

4.1.2.13 TDMA Burst and Frame length 
 The
receiver shall support a variety of different TDMA burst lengths. The vendor shall supply a table indicated the proposed burst length for the various traffic and control channels. 

The receiver shall support a variety of different frame lengths based on symbol rate and traffic and control channels. The vendor shall
supply a table indicated the proposed frame structures. 
 4.1.2.14 Es/No, Eb/No Requirements 

Reference values of
Es/N
o,
Eb/N
o for demodulation and decoding in AWGN conditions shall be within 0.1 dB from theoretical performance for
industry standard best codes (equivalently, demodulator and decoder losses shall be less than 0.1 dB in AWGN channel with perfect timing, phase and amplitude information). Performance of timing, phase and amplitude estimation to support
efficient demodulation and decoding should be according to the best practice in industry. Specifically, performance degradation of above estimation loops should not cause more than [0.2] dB loss relative to performance of maximum likelihood
estimators in dynamic fading conditions for each of the three impairments evaluated separately. 
  

			
	Exhibit B	  	 Version 4.4

6/11/09
 Page 19 of
33

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 4.1.2.15 Receiver Selectivity 

The S-BSS receiver selectivity (as defined by 3GPP in 25.104) shall be no less than 25 dB. The test shall be conducted with the condition defined in
25.104. 
 4.1.2.16 Spurious Emissions 

The receiver shall comply with the requirements FCC part 15 with regard to spurious emissions. 

4.2 GENERAL PERFORMANCE REQUIREMENTS 

4.2.1 Synchronization 
 The satellite base
station shall support GPS based synchronization of the air interface and network timing. 
 The S-BSS shall support interbeam
synchronization of the air interface timing. 
 4.2.2 Spot Beam Operation 

 

	 	1.	The S-BSS shall support flexible operation with spot beams. 

  

	 	2.	The beam pitch may be varied from 0.25 degrees to 0.5 degrees. 

Each beam will contain up to 5 MHz of spectrum per gateway. 

4.2.3 Inter-Beam Beam C/I 
 The
S-BSS shall be able to operate with wide range of C/I ratios (>=3dB). 
 4.3 INTERFACE TECHNICAL
PARAMETERS 
 4.3.1 S-BSS to GBBF 

The interface between the S-BSS and the GBBF is via 10 Gb/s fiber optic cables. Each XFP transceiver cable contains two high-performance 850 nm, multimode
fiber optics cables: one to carry the Forward beam traffic and the other to carry the Return beam traffic. The XFP transceiver supports 10 Gb/s full-duplex on multimode fiber cables, is compliant to 802.3ae 10GBASE-SR standard. The transceiver
is designed to support distances up to 300 m. The XFP is hot-swappable and permits the transceiver to be added or swapped without interrupting the network systems. 
  

			
	Exhibit B	  	 Version 4.4

6/11/09
 Page 20 of
33

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	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 The data representing a single beam over the satellite is 5 MHz of spectrum as a digitized waveform
formed by 16 bits each real and imaginary at 7.5 MS/s. 
 These single beam data are packed onto the fiber interface in accordance with SBAS
design. 
 There could be up to 44 fiber optic interfaces including 4 spares, if so configured. 

The S-BSS shall support up to 1100 spot beams in the reverse direction, 550 RHCP and 550 LCHP paired beams, when so configured and 550 spot beams
in the forward direction when so configured. 
 The S-BSS shall receive a return beam reference frequency of 10 MHz from the GBBF
representing the pilot loopback adjusted reference. 
 4.3.2 S-BSS to SGSN (Iu-PS) 

The S-BSS shall route traffic and control information over the interface to the SGSN in the core network. The S-BSS shall comply with 3GPP
TS 25.410, 25.411, 25.412, 25.413, 25.414, and 25.415. 
 4.3.3 S-BSS to SGSN (Iu-BC) (P6M) 

The S-BSS shall support service area broadcast protocol over the interface to the SGSN in the core network. The S-BSS shall comply with 3GPP
TS 25.419. 
 4.3.4 S-BSS Clock Stability 

The S-BSS requires a stable clock of better than 1E-8 which shall be derived from GPS timing. 

This clock shall be 10 MHz or other suitable sinusoidal frequency. 

4.3.5 VLANs, GigE and Routing (TBR by PDR) 

The S-BSS shall support 802.1Q, including the support for placing bearer and management traffic in different VLANs. 

The S-BSS shall support 802.1p. 
 The
S-BSS shall support at least 4 physical queues on the egress S-BSS GigE interface(s). 
  

			
	Exhibit B	  	 Version 4.4

6/11/09
 Page 21 of
33

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 4.4 PHYSICAL AND ENVIRONMENTAL REQUIREMENTS 

 

	 	•	 	 Size: 

  

	 	•	 	 The S-BSS shall be compact in form factor and conform to standard rack dimensions. 

 

	 	•	 	 The S-BSS height shall not exceed 8 feet. 

  

	 	•	 	 The S-BSS may fit into multiple racks. 

  

	 	•	 	 Modularity: 

 The S-BSS
components shall be modular. 
 All modules shall support hot swap. 

 

	 	•	 	 Weight: 

  

	 	•	 	 Each S-BSS rack shall weigh less than 1400 lbs. 

 

	 	•	 	 All modules shall weigh less than 25 lbs. 

  

	 	•	 	 Power: 

  

	 	•	 	 The S-BSS shall be configured to operate from AC power systems. 

 

	 	•	 	 The vendor shall state the base station power requirements. 

 

	 	•	 	 The vendor shall state the regulatory standards compliance of the power interface. 

 

	 	•	 	 Operational Environment: 

  

	 	•	 	 The S-BSS equipment shall comply with operational environmental requirements from IEC 60 721-3-3 “Stationary use at weather
protected locations” as applicable for components operating in indoor environments. 

  

	 	•	 	 Storage Environment: 

  

	 	•	 	 The S-BSS shall comply with the following conditions for controlled environments for indoor storage: 

 

	 	•	 	 -10C to +50C 

  

	 	•	 	 10%RH to 95%RH limited to 29 g/m3 and 0.5 g/m3 absolute humidity 

 

	 	•	 	 Transportation Environment: 

  

	 	•	 	 The S-BSS shall comply with the following conditions for Public Transportation: 

 

	 	•	 	 -20C to +60C 

  

	 	•	 	 5%RH to 95%RH limited to 45 g/m3 and 0.177 g/m3 absolute humidity 

 

			
	Exhibit B	  	 Version 4.4

6/11/09
 Page 22 of
33

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 5.0 S-BSS RADIO RESOURCE CONTROL REQUIREMENTS 

The Radio Network Control (RNC) function in the TerreStar S-BSS system is similar in many respects to its counterpart in the 3G ATC domain. 

 

	 	1.	The S-BSS shall provide interface to and act under control of a customer-furnished Global Resource Manager (GRM) in order to effect satellite radio resource management.

  

	 	2.	The S-BSS shall receive the following configuration via the GRM interface: 

 

	 	a)	Definition of spot beams – identification, latitude/longitude for beam center and six vertices, neighbor list. 

 

	 	b)	Definition of service area – assignment of beams per service area, service areas per S-BSS, logical routing area identification per beam as needed for SGSN and UE
coordination. 

  

	 	c)	Definition of resource assignment per beam including spectrum and power. 

  

	 	d)	This configuration shall allow constraints to be specified on a time of day basis. 

 

	 	3.	The S-BSS shall apply the configuration from the GMR to implement local radio resource planning to include: 

 

	 	a)	Partitioning of spectrum and power across beams. 

  

	 	b)	Definition of control and bearer channels for each spot beam. 

  

	 	c)	Ability to employ constraints so as to provide a fixed frequency/channel plan if required, or also to automatically generate a frequency/channel plan if not
constrained. 

  

	 	4.	The S-BSS shall dynamically optimize the local resource plan for assigned service areas based on demand and respecting the defined optimization objectives and
constraints, including frequency borrowing from less busy beams and application of different reuse patterns for different traffic classes in order to optimize resource utilization for changing traffic conditions. (O3M) 

 

	 	5.	The S-BSS shall send beam traffic statistics and performance via the GRM interface to facilitate GRM planning and analysis. 

 

	 	6.	The S-BSS contractor shall be responsible to provide the S-BSS-GRM Interface Control Document for customer approval. 

 

	 	7.	The S-BSS shall allocate traffic and radio equipment to implement the planned control and traffic channels. 

 

	 	8.	The S-BSS shall provide management of which spot beam the user should access. This is in many respects equivalent to the terrestrial network cell or sector.

  

	 	9.	The S-BSS shall support a variety of mobile terminals in different normal and emergency situations. 

 

	 	10.	The S-BSS shall support a wide mix of multimedia and voice services with many QoS and priority levels. 

 

			
	Exhibit B	  	 Version 4.4

6/11/09
 Page 23 of
33

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

	 	11.	The S-BSS shall be flexible, and scalable so that it can efficiently support new services, requirements and traffic patterns. 

 

	 	12.	The S-BSS shall be software upgradable. 

6.0 PRIORITIZATION AND PRE-EMPTION SUPPORT 

In case traffic congestion or critical conditions such as disasters, the network quickly becomes overloaded and cannot service its high priority users
(for example, public first responders) or commercial users. In these cases, pre-emption and access class-based radio level control mechanisms shall be used to alleviate the congestion and provide radio-level access only to users that have the
required priority, based on operator specified definitions. 
  

	 	1.	The S-BSS shall at minimum support UMTS Release 6 Priority and Preemption mechanisms. 

 

	 	2.	The S-BSS shall provide mechanisms for applying available S-BSS resources related to UMTS QoS levels for the purpose of prioritization and preemption of
sessions. 

  

	 	3.	The S-BSS shall support assignment of priorities to sessions. 

  

	 	4.	The S-BSS shall support preemption of existing sessions based on network policies and S_BSS resources. 

 

	 	5.	The S-BSS shall support downgrading or upgrading session priorities depending upon network policies and S-BSS resources 

 

			
	Exhibit B	  	 Version 4.4

6/11/09
 Page 24 of
33

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 7.0 POWER CONTROL 

In some instances it might be desirable to limit or adjust maximum transmit power on S-BSS forward link. This is needed to support emergency scenarios,
forward link spectrum sharing with ATC network in particular areas as well as to manage per beam power consumption in the satellite power amplifiers. 
  

	 	1.	The S-BSS shall be able to control the transmit power per beam for individual beams as per instructions from GRM. 

 

	 	2.	The S-BSS and GMR-3G shall support closed loop power control of individual traffic channels on return link to compensate for slow channel variations (such as
shadowing, head loss and similar) based on the received signal strength averaged over 1 sec. The system shall support a single step power adjustment to the desired level of up to 10 dB. The system shall be able to adjust the power
level in multiple steps so as to achieve the desired signal level with precision [+/-0.25 for 1 dB step adjustment and +/- 1dB for 10 dB step adjustment] dB. 

 

	 	3.	The S-BSS shall support similar power control mechanism on forward link. Forward link power shall be applicable only for dedicated channels. 

 

	 	4.	The S-BSS and GMR-3G shall employ an outer loop power control that adjusts the reference received signal level used for power control based upon signal quality
metrics (mean and variance signal-to-noise ratio and CRC) measured over (10/Target FER) bursts or 10 seconds, whichever occurs first. 

  

			
	Exhibit B	  	 Version 4.4

6/11/09
 Page 25 of
33

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 8.0 NETWORK MANAGEMENT 

Network management shall provide the following features within the S-BSS components: 

 

	 	•	 	 Fault Management 

  

	 	•	 	 Configuration Management 

  

	 	•	 	 Performance Management 

  

	 	•	 	 Security Management 

 The
S-BSS shall have an Element Manager which manages the various devices in the S-BSS. The Element Manager shall be managed by a Network Manager in the Core Network or the NOC. 

8.1 FAULT MANAGEMENT 
 The S-BSS
shall support carrier grade availability (i.e. availability of at least 99.99% for full capacity or better for a fraction of capacity TBR by PDR). Failure in any component of the S-BSS therefore must be handled quickly and where appropriate
autonomously. 
  

	 	1.	The S-BSS shall support 3GPP fault management requirements (comparable to 3GPP 32.111-1). 

 

	 	2.	The S-BSS shall have local redundancy built-in. 

  

	 	3.	The S-BSS shall self-correct/heal capability for all critical blocks that could affect the carrier grade availability. 

 

	 	4.	The S-BSS shall run self-tests on itself and its managed components. 

 

	 	5.	The system shall employ geographic redundancy between the two gateways. 

 

	 	6.	The S-BSS shall forward alarms to the Network Manager. 

  

	 	7.	The Element Manager shall have a secure web interface for views of alarms/events. 

 

	 	8.	The Network Manager shall be able to access the Element Manager view at a particular S-BSS. 

 

			
	Exhibit B	  	 Version 4.4

6/11/09
 Page 26 of
33

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 8.2 CONFIGURATION MANAGEMENT 

Configuration management is an important component of the overall network management function. It is desired that configuration management of the S-BSS
support logical expansion and upgrade of the S-BSS hardware and software components. 
  

	 	1.	The S-BSS shall support Configuration Management functionality comparable to 3GPP 32.106. 

 

	 	2.	The S-BSS shall be able to accept GRM related configuration. Configuration related to the GRM may require some software installation on the S-BSS, and
shall also require some means of interfacing with the Element Manager in the S-BSS. 

  

	 	3.	The S-BSS shall support the NE-Local MIB or the Mirrored local MIB specification. 

8.3 PERFORMANCE AND USAGE STATISTICS COLLECTION 

The S-BSS shall report performance parameters representing the health and operation of the S-BSS to network operations personnel in an accurate,
complete, and timely manner. 
 8.4 SECURITY AND ACCESS MANAGEMENT 

 

	 	1.	The S-BSS shall provide Security Management comparable to the 3GPP 32.371 v6.2.0 specification for Security Management. 

 

			
	Exhibit B	  	 Version 4.4

6/11/09
 Page 27 of
33

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 9.0 NARROW-BAND BEAM FORMING (NBBF) (ICD+O3M, ICD SHALL BE DELIVERED BY TSN
EDC+2M) 
 The S-BSS shall provide “hooks” for Narrow-Band Beam Forming. 

Terrestar may eventually require a Narrow Band Beam Forming (NBBF) system which would dynamically create beams on a per user basis. It is expected that
the NBBF will work with the support of the GBBF as well as the SBSS to generate the required beams. The creation of such a system will require functionality to be added to the SBSS. Therefore, the SBSS shall include hooks so that this
functionality could be added at a later date. 
 The data flow diagram is shown in figure 1-1. When a user requests a channel the SBSS will
provide the NBBF with frequency channel alternatives that are under consideration. The NBBF will provide the SBSS with information such as expected SNR for each of the candidate channels along with subscribers currently operating in a given band.

 [***] 
 Next the SBSS will assign
the new user to frequency and time slot. The NBBF will create a new beam for that subscriber. Beams at different frequencies and time slots but over the same coverage cell will be combined and defined as a single virtual beam before being
transferred to the SBSS so that the NBBF beam interface is identical to the GBBF beam interface. 
 The SBSS shall include the following
interfaces 
 To the NBBF: 
  

	 	1.	Beam information such as bandwidth, location, pilot information and any other information required to define a beam and subscriber 

 

	 	2.	The frequency and time slot allocation for the assigned beam. 

  

	 	3.	Timing information for signals. 

From the NBBF to the SBSS: 
  

	 	1.	Information to aid in scheduling such as expected SNRs for a beam assigned to a given frequency and time slot along with the SNRs of the legacy channels already
assigned. 

 The SBSS will interface to both the GBBF formed beams as well as the individual feed elements for generating beams.
During the acquisition processes the SBSS will utilize GBBF formed beams. However, after call setup the SBSS will switch to the NBBF beams. 
  

			
	Exhibit B	  	 Version 4.4

6/11/09
 Page 28 of
33

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 After call setup the NBBF will provide unique beam coefficients for the individual users. However, this
will be transparent to the SBSS since users over a given cell area will be combined into a composite signal that will be transferred to the SBSS as an equivalent beam. For each cell the SBSS could receive three beams, one from each of the SBAS
stations and one from the NBBF. 
 The NBBF interfaces with the GBBF are not presented in this addendum. 

10.0 TWO-SATELLITE DIVERSITY 

The S-BSS design shall provide “hooks” for implementation of optimal dual-satellite diversity combining on the return link when the
second satellite becomes available, if that option should be requested by TerreStar Networks at any time after the second satellite is launched. 

When the second satellite becomes operational and if requested by the vendor, the S-BSS shall support assignment of individual terminals to the
satellite with which they have a better “view” and consequently smaller probability of outage. The S-BSS and GMR-3G design shall enable this feature. 

11.0 SINGLE ANTENNA INTERFERENCE CANCELLATION (SAIC) (P6M) 

The SAIC is capacity achieving feature and will enable to use smaller frequency reuse plans and correspondingly improve the capacity (overall spectral
efficiency of the system) on the return link. Present industry solutions improve spectral efficiency from 40% (for blind interference cancellation) to 110% (joint decoding based interference cancellation designed by Trellisware). 

12.0 MIMO (ALAMOUTI SCHEME) (O3M) 

[***] 
  

			
	Exhibit B	  	 Version 4.4

6/11/09
 Page 29 of
33

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 13.0 ANNEX 1- GMR- 3G REFERENCE AND REQUIREMENTS 

[***] 

Figure A-1. GMR-3G User Plane Protocol Stack 

[***] 

Figure A-2. GMR-3G Control Plane Protocol Stack 

Table A-1. GMR-3G Application Specifications 

 

					
	 Section
	 	 Reference
	 	 Requirement

		 	[***]	 	[***]
		 	[***]	 	[***]
		 	[***]	 	[***]
		 	[***]	 	[***]
		 	[***]	 	[***]
		 	[***]	 	[***]
		 	[***]	 	[***]

 A. GMR-3G Physical Channels

 [***] 

Table A-2. Forward Link Modulation, Coding, and Information Rates 

 

													
	 Reference
	 	 Modulation
	 	 Approx.

Effective

Code

Rate
	 	 BW

(KHz)
	 	 Symbol

Rate
	 	 Approx. Net

Payload Bit

Rate (Kb/s)
	 	 Gross Bit

Rate

(Kb/s)

	 1
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 2
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 3
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 4
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 5
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 6
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 7
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 8
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 9
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 10
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 11
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 12
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 13
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 14
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]

  

			
	Exhibit B	  	 Version 4.4

6/11/09
 Page 30 of
33

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 [***] 

Table A-3. Return Link Modulation, Coding, and Information Rates 

 

													
	 Reference
	 	 Modulation
	 	 Approx.

Effective

Code

Rate
	 	 BW

(KHz)
	 	 Symbol

Rate
	 	 Approx. Net

Payload Bit Rate
(Kb/s)
	 	 Gross Bit

Rate

(Kb/s)

	 1
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 2
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 3
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 4
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 5
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 6
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 7
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 8
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 9
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 10
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 11
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]

 The S-BSS required Es/No and the
corresponding error rates are defined in Table A-4. These values represent the AWGN modem performance stand alone without terminal or Gateway Earth Station RF or satellite link impairments. 

Table A-4. Return Link Es/No (Modem to Modem) 

 

													
	 Reference
	 	 Modulation
	 	 FEC
	 	 Approx

Code

Rate
	 	 Symbol Rate (KS/s)
	 	 Required

Es/No

(dB)
	 	 BER/FER

	 1
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 2
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 3
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 4
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 5
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 6
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 7
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 8
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 9
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 10
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]
	 11
	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]	 	[***]

  

			
	Exhibit B	  	 Version 4.4

6/11/09
 Page 31 of
33

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 Table A-5. S-BSS Channel Unit Specifications 

 

					
	 Section
	 	 Reference
	 	 Requirement

		 	[***]	 	[***]
		 	[***]	 	[***]
		 	[***]	 	[***]
		 	[***]	 	[***]
		 	[***]	 	[***]
		 	[***]	 	[***]
		 	[***]	 	[***]
		 	[***]	 	[***]
		 	[***]	 	[***]
		 	[***]	 	[***]
		 	[***]	 	[***]
		 	[***]	 	[***]
		 	[***]	 	[***]
		 	[***]	 	[***]
		 	[***]	 	[***]
		 	[***]	 	[***]
		 	[***]	 	[***]
		 	[***]	 	[***]
		 	[***]	 	[***]
		 	[***]	 	[***]

 B. Logical Channels 

[***] 
  

			
	Exhibit B	  	 Version 4.4

6/11/09
 Page 32 of
33

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem Functional

Requirements
	  	 

  

 14.0 ANNEX 2 – SCHEDULE OF FEATURE RELEASES 

 

			
	 Release
	 	 Feature

	 [***]
	 	[***]
	 [***]
	 	[***]
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	 	[***]

  

			
	Exhibit B	  	 Version 4.4

6/11/09
 Page 33 of
33

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

 Exhibit B2 

Satellite Base Station Subsystem (S-BSS) and Chipset 

Functional Requirements 

TSN_SUB_2_TRD-Satellite Chipset Functional Requirements 

Version
5.5                             May 15, 2008 

Hughes Network Systems, LLC 
 11717
Exploration Lane 
 Germantown, Maryland 20876 
  

 
 TerreStar Networks, Inc.

 One Discovery Place 
 12010
Sunset Hills Road, 6th Floor 
  

This document contains data and information proprietary to TerreStar Networks Inc. This data is being
furnished pursuant to the provisions of the Contract between TerreStar Networks Inc. and Hughes Network Systems, LLC for the TerreStar Satellite Base Station Subsystem. Hughes Network Systems, LLC and TerreStar Networks Inc. shall have the right to
duplicate, use or disclose the data and information to the extent specified in the Contract and herein. 

			
	Exhibit B2	  	 Version 5.5

10/8/08

	TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

Information included in this Exhibit may contain technical data controlled by the
Export Administration Regulations (“EAR”) and/or the International Traffic in Arms Regulations (“ITAR”). This document has not been cleared for export or transfer to a Foreign Person or foreign entity.

 Reston, Virginia 20190 

Vincent Loiacono, Chief Accounting Officer 

 

			
	Exhibit B2	  	 Version 5.5

5/15/09

	 ii

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

 Revision History 

 

							
	 Date
	  	Version	  	 Description
	  	Author
	 4/27/07
	  	5.1	  	Initial Release and Contract Execution Copy	  	[***]
	 1/31/08
	  	5.2	  	Incorporate CCN #1, 2	  	[***]
	 5/12/2008
	  	5.3	  	Incorporate CCN # 5, 7	  	[***]
	 10/8/08
	  	5.4	  	Draft Update for Oct 2008 Replanning	  	[***]
	 5/15/09
	  	5.5	  	Amendment 4	  	[***]

  

			
	Exhibit B2	  	 Version 5.5

5/15/09

	 iii

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

 TABLE OF CONTENTS 

 

			
	 SECTION
	  	PAGE
	 REVISION HISTORY
	  	III
	 1.0 INTRODUCTION
	  	1-1
	 1.1 PURPOSE AND SCOPE
	  	1-1
	 1.2 DOCUMENT HIERARCHY
	  	1-1
	 1.3 DOCUMENT CONVENTIONS
	  	1-2
	 1.4 DEFINITIONS
	  	1-2
		
	 2.0 GMR-3G SATELLITE CHIPSET PLATFORM
	  	2-1
	 2.1 OVERVIEW
	  	2-1
	 2.2 SATELLITE BASEBAND [***] DEVELOPMENT PHASES
	  	2-1
	 2.2.1 Phase 1 Development
	  	2-1
	 2.2.2 Phase 2 Development
	  	2-1
		
	 3.0 SATELLITE BASEBAND [***] HARDWARE PLATFORM (PHASE 2)
	  	3-1
	 3.1 ARCHITECTURE
	  	3-1
	 3.2 REQUIREMENTS
	  	3-1
	 3.2.1 Functional Requirements
	  	3-2
	 3.2.1.1 Two Antenna Operation
	  	3-2
	 3.2.2 Performance Requirements
	  	3-2
	 3.2.2.1 Link Performance Requirements
	  	3-2
	 3.2.2.2 RF Performance Requirements
	  	3-4
	 3.2.3 Encryption
	  	3-4
	 3.2.4 Power Savings Mode
	  	3-5
	 3.2.5 Test Features
	  	3-5
	 3.2.6 Interface Requirements
	  	3-5
	 3.2.6.1 ADC Interface
	  	3-5
	 3.2.6.2 DAC Interface
	  	3-6
	 3.2.6.3 Serial Interface
	  	3-6
	 3.2.6.4 I2C Interface
	  	3-6
	 3.2.6.5 IF/RF Interface
	  	3-6
	 3.2.6.6 Ethernet Interface
	  	3-6
	 3.2.6.7 GPIO Interface
	  	3-7
	 3.2.6.8 Debug Interface
	  	3-8
	 3.2.6.9 Clock Interface
	  	3-8
	 3.2.6.10 External Memory Interface
	  	3-8
	 3.2.7 Physical & Environmental Requirements
	  	3-9
	 3.2.8 Power Requirements
	  	3-9
		
	 4.0 SATELLITE BASEBAND [***] HARDWARE PLATFORM FOR PHASE 1
	  	4-1
	 4.1 PHASE 1 ARCHITECTURE
	  	4-1

  

			
	Exhibit B2	  	 Version 5.5

5/15/09

	 iv

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

			
	 4.2 PHASE 1 REQUIREMENTS
	  	4-1
	 4.2.1 Functional Requirements
	  	4-1
	 4.2.2 Interface Requirements
	  	4-1
	 4.2.3 Physical Requirements
	  	4-2
		
	 5.0 SATELLITE BASEBAND SOFTWARE PLATFORM
	  	5-1
	 5.1 OVERVIEW
	  	5-1
	 5.2 ARCHITECTURE
	  	5-1
	 5.3 SATELLITE BASEBAND SOFTWARE PLATFORM REQUIREMENTS
	  	5-1
	 5.3.1 Access Stratum Functional Requirements
	  	5-1
	 5.3.2 DSP/PHY Functional Requirements
	  	5-2
	 5.3.3 Services
	  	5-2
	 5.3.3.1 VoIP
	  	5-2
	 5.3.3.2 Emergency Voice Calling
	  	5-2
	 5.3.3.3 IP Multicast and Push-to-Talk Voice
	  	5-3
	 5.3.3.4 Data Services
	  	5-3
	 5.3.3.5 Video Services
	  	5-3
	 5.3.3.6 Multimedia
	  	5-3
	 5.3.4 Security
	  	5-3
	 5.3.5 Handoff
	  	5-4
	 5.3.6 Power Control
	  	5-4
	 5.3.7 Hybrid ARQ
	  	5-4
	 5.3.8 Single Antenna Interference Cancellation
	  	5-4
	 5.3.9 Power Management
	  	5-4
	 5.3.10 Management and Diagnostic Features
	  	5-4
	 5.3.11 Operating System Requirements
	  	5-5
	 5.3.12 Processing Requirements
	  	5-5
	 5.3.13 Memory Requirements
	  	5-5
	 5.3.14 Interface Requirements
	  	5-5
	 5.4 PERFORMANCE ENHANCING PROXY (PEP)
	  	5-5
	 5.5 ATC PROCESSOR REQUIREMENTS (CFE)
	  	5-6
		
	 6.0 SCHEDULE OF FEATURE RELEASES
	  	6-1
		
	 7.0 ACRONYMS AND ABBREVIATIONS
	  	7-1

  

			
	Exhibit B2	  	 Version 5.5

5/15/09

	 v

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

 LIST OF FIGURES 

 

			
	 FIGURE
	  	PAGE
	 Figure 2-1. GMR-3G Satellite Chipset Platform Architecture
	  	2-1
	 Figure 2-2. GMR-3G Satellite Baseband Discrete Solution application for Phase 1
	  	2-1
	 Figure 2-3. GMR-3G Satellite Baseband [***] Typical Application for Phase 2
	  	2-1
	 Figure 3-1. Satellite Baseband [***] Architecture for Phase 2
	  	3-1
	 Figure 3-2 Oberon Integration Board Block Diagram
	  	3-9
	 Figure 4-1. Discrete Satellite Baseband Solution Architecture for Phase 1
	  	4-1
	 Figure 5-1. UMTS/GMR-3G Protocol Stack
	  	5-1

  

			
	Exhibit B2	  	 Version 5.5

5/15/09

	 vi

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

 LIST OF TABLES 

 

			
	 TABLE
	  	PAGE
	 Table 1-1. Document Hierarchy
	  	1-1
	 Table 1-2. Requirement Specification Table Format
	  	1-2
	 Table 3-2. Two Antenna Operation
	  	3-1
	 Table 3-3. Transmit Modulation, Coding, and Information Rates
	  	3-2
	 Table 3-4. Receive Modulation, Coding, and Information Rates
	  	3-2
	 Table 3-5. Receive Es/No (Modem to Modem)
	  	3-3
	 Table 3-6. RF Performance Requirements
	  	3-4
	 Table 3-7. Encryption
	  	3-4
	 Table 3-8. Power Savings Mode
	  	3-4
	 Table 3-9. Test Features
	  	3-5
	 Table 3-10. ADC Interface
	  	3-5
	 Table 3-11. DAC Interface
	  	3-5
	 Table 3-12. Serial Interface
	  	3-6
	 Table 3-13. I2C Interface
	  	3-6
	 Table 3-14. IF/RF Interface
	  	3-6
	 Table 3-15. Ethernet Interface
	  	3-6
	 Table 3-16. GPIO Interface
	  	3-7
	 Table 3-17. Debug Interface
	  	3-8
	 Table 3-18. Clock Interface
	  	3-8
	 Table 3-19. External Memory Interface
	  	3-8
	 Table 3-20. Physical & Environmental Requirements
	  	3-9
	 Table 3-21. Power Requirements
	  	3-9
	 Table 3-21. Power Requirements
	  	3-9
	 Table 3-22. Oberon Integration Board Requirements
	  	3-10
	 Table 4-1. Phase 1 Exceptions
	  	4-1
	 Table 4-2. Interface Requirements
	  	4-1
	 Table 5-2. DSP/PHY Functional Requirements
	  	5-1
	 Table 5-3. VoIP
	  	5-2
	 Table 5-4. Emergency Voice Calling
	  	5-2
	 Table 5-5. IP Multicast and Push-to-Talk Voice
	  	5-2
	 Table 5-6. Data Services
	  	5-3
	 Table 5-7. Video Services
	  	5-3
	 Table 5-8. Multimedia
	  	5-3
	 Table 5-9. Security
	  	5-3
	 Table 5-10. Handoff
	  	5-3
	 Table 5-11. Power Control
	  	5-4
	 Table 5-12. Hybrid ARQ
	  	5-4
	 Table 5-13. Single Antenna Interference Cancellation
	  	5-4
	 Table 5-14. Power Management
	  	5-4
	 Table 5-15. Management and Diagnostic Features
	  	5-4
	 Table 5-16. Operating System Requirements
	  	5-5

  

			
	Exhibit B2	  	 Version 5.5

5/15/09

	 vii

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

			
	 Table 5-17. Memory Requirements
	  	5-5
	 Table 5-18. Interface Requirements
	  	5-5
	 Table 5-19. PEP Requirements
	  	5-5
	 Table 5-20. Imposed Requirements for the CFE ATC Processor and NAS
	  	5-6

  

			
	Exhibit B2	  	 Version 5.5

5/15/09

	 viii

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

 1.0 INTRODUCTION 

1.1 PURPOSE AND SCOPE 
 The document
is the technical specification for the GMR-3G Satellite Chipset Platform supporting the operation of terminals over the satellite portion of the TerreStar 3G networks. 

Hughes is responsible for delivering the Satellite Baseband solution and the GMR-3G software. The Satellite Baseband hardware is being developed [***].
This document provides the requirements for [***] of hardware platform and the associated software. 
 Section 2.0 provides an overview of
the architecture for the GMR-3G Satellite Chipset Platform. Section 3.0 details the [***] architecture and requirements while Section 4.0 provides the requirements for the [***]. Section 5.0 provides the details of the software
components that Hughes offers to develop to support satellite operation for TerreStar terminals. 
 The assumption in this document is that
Hughes will supply the [***] to a TerreStar-Selected vendor [***]. 
 1.2 DOCUMENT HIERARCHY 

Table 1-1. Document Hierarchy 
  

					
	 No.
	  	 Document
	  	 Content

			
	1.	  	Contract	  	Terms and Conditions
			
	2.	  	 Exhibit A
 Exhibit
A2
	  	 Statement of Work, S-BSS

Statement of Work, Chipset Platform

			
	3.	  	 Exhibit B
 Exhibit
B2
	  	S-BSS Technical Specification GMR-3G Satellite Chipset Platform Technical Specification
			
	4.	  	 Exhibit C
 Exhibit
C2
	  	 Price Schedule and Payment Milestones

Chipset Platform Price Schedule and Payment Milestones

			
	5.	  	 Exhibit D
 Exhibit
D2
	  	 Options
 Chipset Platform
Options

  

			
	Exhibit B2	  	 Version 5.5

4/27/07

	 1-1

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

 1.3 DOCUMENT CONVENTIONS 

The meaning of the following terms is appropriate throughout this Technical specification document: 

 

	Shall	Represents a mandatory requirement that must be implemented in full by the Contractor or Customer as noted. 

 

	Should	Represents a desirable, but not legally required, act, or omission, whose implementation (in full or in part) is considered advantageous to the service.

  

	Shall not	Represents a requirement that will not under any circumstances be implemented by the defined party. 

The requirement numbers shall comprise the specification section number from the table, concatenated with the reference number from the table, for
example, 2.1.1 or 2.1.3 in the Table 1-2 example. 
 Parameters that are in square brackets are subject to change. The contractor
shall propose final numbers at C-PDR. 
  

					
	Table 1-2. Requirement Specification Table Format
			
	 Section
	  	Reference	  	 Requirement

	 X.X
 (e.g., 2.1)

	  	1	  	The GMR-3G Satellite Chipset Platform shall ...
	  	2	  	The GMR-3G Satellite Chipset Platform shall ...
	  	3	  	The GMR-3G Satellite Chipset Platform shall ...

1.4 DEFINITIONS 
 ATC Baseband
Processor         [***] 
 SAT Baseband
Processor         [***] 
  

			
	Exhibit B2	  	 Version 5.5

4/27/07

	 1-2

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

 2.0 GMR-3G SATELLITE CHIPSET PLATFORM 

2.1 OVERVIEW 
 The GMR-3G Satellite
chipset platform consists of a Hughes supplied [***] hardware and Hughes supplied [***] software. The GMR-3G Satellite chipset platform [***] 

It is assumed that the GMR-3G Satellite Chipset Platform hosts [***] 

The operational concept of the GMR-3G Satellite Chipset Platform is to [***] functions operating under the control and supervision of the [***]. Overall
terminal operation, application processing, voice and or video coding, terrestrial communications (UMTS or GSM) and user interface functions are performed by the [***] 

The RF Components: [***]. A high-level block diagram of the Satellite Chipset platform as used in a terminal is shown in Figure 2-1. 

[***] 
 Figure
2-1. GMR-3G Satellite Chipset Platform Architecture 
 2.2 SATELLITE BASEBAND [***] DEVELOPMENT PHASES 

The Satellite Chipset Platform will be developed in two phases. 

2.2.1 Phase 1 Development 
 [***]

 [***] 

Figure 2-2. GMR-3G Satellite Baseband Discrete Solution application for Phase 1 

2.2.2 Phase 2 Development 
 [***]

 [***] 
 Figure 2
-3 [***] 
 Figure 2-3. GMR-3G Satellite Baseband [***] Typical Application for Phase 2 

 

			
	Exhibit B2	  	 Version 5.5

4/27/07

	 2-1

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

 3.0 SATELLITE BASEBAND [***] HARDWARE PLATFORM (PHASE 2) 

3.1 ARCHITECTURE 
 [***] 

[***] 
 Figure
3-1. Satellite Baseband [***] Architecture for Phase 2 
 3.2 REQUIREMENTS 

3.2.1 Functional Requirements 
  

					
	Table 3-1. Functional Requirements
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]

  

			
	Exhibit B2	  	 Version 5.5

4/27/07

	 3-1

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

 3.2.1.1 Two Antenna Operation 

 

					
	Table 3-2. Two Antenna Operation
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]

 3.2.2 Performance Requirements

 3.2.2.1 Link Performance Requirements 

[***] 
  

													
	Table 3-3. Transmit Modulation, Coding, and Information Rates
	 Reference
	  	 Modulation
	  	 Approx. Effective
Code Rate
	  	 BW (KHz)
	  	 Symbol Rate
	  	 Approx. Net
Payload Bit
Rate
(Kb/s)
	  	 Gross Bit
Rate (Kb/s)

	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	
	 *  - Design and implementation of bearer 4b is not required unless reception of this bearer becomes a
requirement for the S-BSS

 [***] 
  

			
	Exhibit B2	  	 Version 5.5

4/27/07

	 3-2

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

													
	Table 3-4. Receive Modulation, Coding, and Information Rates
							
	 Reference
	  	 Modulation
	  	 Approx.

Effective
Code Rate
	  	 BW
(KHz)
	  	 Symbol Rate
	  	 Approx. Net
Payload Bit
Rate
(Kb/s)
	  	 Gross Bit
Rate (Kb/s)

	1	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	2	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	3	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	4	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	5	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	6	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	7	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	8	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	9	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	10	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	11	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	12	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	13	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	14	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]

 [***] 

 

													
	Table 3-5. Receive Es/No (Modem to Modem)
							
	 Reference
	  	 Modulation
	  	 FEC
	  	 Approx
Code Rate
	  	 Symbol Rate
(KS/s)
	  	 Required
Es/No (dB)
	  	 BER/FER

	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]

  

			
	Exhibit B2	  	 Version 5.5

4/27/07

	 3-3

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

 3.2.2.2 RF Performance Requirements 

[***] 
  

					
	Table 3-6. RF Performance Requirements
			
	 Section
	  	 Reference
	  	 Requirement

	 3.2.2.2
	  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]

 3.2.3 Encryption 

 

					
	Table 3-7. Encryption
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]

  

			
	Exhibit B2	  	 Version 5.5

4/27/07

	 3-4

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

 3.2.4 Power Savings Mode 

 

					
	Table 3-8. Power Savings Mode
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]

 3.2.5 Test Features 

 

					
	Table 3-9. Test Features
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]

 3.2.6 Interface Requirements

 3.2.6.1 ADC Interface 
  

					
	Table 3-10. ADC Interface
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]

  

			
	Exhibit B2	  	 Version 5.5

4/27/07

	 3-5

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

 3.2.6.2 DAC Interface 

 

					
	Table 3-11. DAC Interface
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]

 3.2.6.3 Serial Interface 

 

					
	Table 3-12. Serial Interface
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]

 3.2.6.4 I2C Interface 

 

					
	Table 3-13. I2C Interface
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]

 3.2.6.5 IF/RF Interface 

 

					
	Table 3-14. IF/RF Interface
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]

 3.2.6.6 Ethernet Interface 

 

					
	Table 3-15. Ethernet Interface
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]

  

			
	Exhibit B2	  	 Version 5.5

4/27/07

	 3-6

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

 3.2.6.7 GPIO Interface 

 

					
	Table 3-16. GPIO Interface
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]

  

			
	Exhibit B2	  	 Version 5.5

4/27/07

	 3-7

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

 3.2.6.8 Debug Interface 

 

					
	Table 3-17. Debug Interface
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]
		  	[***]	  	[***]

 3.2.6.9 Clock Interface 

 

					
	Table 3-18. Clock Interface
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]

 3.2.6.10 External Memory Interface 

  

					
	Table 3-19. External Memory Interface
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]

  

			
	Exhibit B2	  	 Version 5.5

4/27/07

	 3-8

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

 3.2.7 Physical & Environmental Requirements 

 

					
	Table 3-20. Physical & Environmental Requirements
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]
	  	[***]	  	[***]
	  	[***]	  	[***]
	  	[***]	  	[***]
	  	[***]	  	[***]
	  	[***]	  	[***]
	  	[***]	  	[***]

 3.2.8 Power Requirements 

 

					
	Table 3-21. Power Requirements
			
	 Section
	  	 Reference
	  	 Requirement

	[***]	  	[***]	  	[***]
	  	[***]	  	[***]
	  	[***]	  	[***]
	  	[***]	  	[***]

 [***] 

[***] 
  

					
	Table 3-22. [***]
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]
	  	[***]	  	[***]

 [***] 

Figure 3-2 [***] 
 [***]

  

			
	Exhibit B2	  	 Version 5.5

4/27/07

	 3-9

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

					
	Table 3-23. [***]
			
	 Section
	  	Reference	 	 Requirement

	 [***]
	  	[***]	 	[***]
	  	[***]	 	[***]
	  	[***]	 	[***]
	  	[***]	 	[***]
	  	[***]	 	[***]
	  	[***]	 	[***]

  

			
	Exhibit B2	  	 Version 5.5

4/27/07

	 3-10

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

 4.0 SATELLITE BASEBAND [***] 

HARDWARE PLATFORM FOR PHASE1 

4.1 PHASE 1 ARCHITECTURE 
 [***]

 Figure 4-1. [***] 

[***] 
 4.2 PHASE 1 REQUIREMENTS 

 4.2.1 Functional Requirements 

The Phase 1 solution shall have the same functionality as described in Chapters 1, 2, 3 and 5 except as noted in Table 4-1 as exceptions. 

 

					
	Table 4-1. Phase 1 Exceptions
			
	 Section
	  	 Phase 2
Reference

Paragraph
	  	 Exception

	 [***]
	  	[***]	  	[***]
	  	[***]	  	[***]
	  	[***]	  	The Discrete Baseband solution will not support Receive and Transmit Diversity operations.
		  	[***]	  	The Discrete Baseband shall not be required to have internal ADC and DAC.

4.2.2 Interface Requirements 
  

					
	Table 4-2. Interface Requirements
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]

  

			
	Exhibit B2	  	 Version 5.5

4/27/07

	 4-1

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

 4.2.3 Physical Requirements 

 

					
	Table 4-3. Physical Requirements
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]

  

			
	Exhibit B2	  	 Version 5.5

4/27/07

	 4-2

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

 5.0 SATELLITE BASEBAND SOFTWARE PLATFORM 

5.1 OVERVIEW 
 [***] 

5.2 ARCHITECTURE 
 [***] 

Figure 5-1. UMTS/GMR-3G Protocol Stack 

5.3 SATELLITE BASEBAND SOFTWARE PLATFORM REQUIREMENTS 

5.3.1 Access Stratum Functional Requirements 
  

					
	Table 5-1. Access Stratum Functional Requirements
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]

  

			
	Exhibit B2	  	 Version 5.5

4/27/07

	 5-1

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

 5.3.2 DSP/PHY Functional Requirements 

 

					
	Table 5-2. DSP/PHY Functional Requirements
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]

 5.3.3 Services 

[***] 
 5.3.3.1 VoIP 

[***] 
  

					
	Table 5-3. VoIP
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]

 5.3.3.2 Emergency Voice Calling

 [***] 
  

					
	Table 5-4. Emergency Voice Calling
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]

  

			
	Exhibit B2	  	 Version 5.5

4/27/07

	 5-2

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

 5.3.3.3 IP Multicast and Push-to-Talk Voice 

 

					
	Table 5-5. IP Multicast and Push-to-Talk Voice
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]

 5.3.3.4 Data Services 

 

					
	Table 5-6. Data Services
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]

 5.3.3.5 Video Services 

 

					
	Table 5-7. Video Services
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]

 5.3.3.6 Multimedia 

 

					
	Table 5-8. Multimedia
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]

 5.3.4 Security 

 

					
	Table 5-9. Security
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]

  

			
	Exhibit B2	  	 Version 5.5

4/27/07

	 5-3

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

 5.3.5 Handoff 

 

					
	Table 5-10. Handoff
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]

 5.3.6 Power Control 

 

					
	Table 5-11. Power Control
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]

 5.3.7 Hybrid ARQ 

 

					
	Table 5-12. Hybrid ARQ
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]

 5.3.8 Single Antenna Interference
Cancellation 
  

					
	Table 5-13. Single Antenna Interference Cancellation
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]

 5.3.9 Power Management 

 

					
	Table 5-14. Power Management
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]

 5.3.10 Management and Diagnostic Features

  

					
	Table 5-15. Management and Diagnostic Features
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]
		  	[***]	  	[***]

  

			
	Exhibit B2	  	 Version 5.5

4/27/07

	 5-4

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

 5.3.11 Operating System Requirements 

 

					
	Table 5-16. Operating System Requirements
	 [***]
	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]

 5.3.12 Processing Requirements

 [***] 
 5.3.13 Memory
Requirements 
  

					
	Table 5-17. Memory Requirements
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]
		  	[***]	  	[***]

 5.3.14 Interface Requirements

  

					
	Table 5-18. Interface Requirements
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]

 5.4 PERFORMANCE ENHANCING PROXY (PEP) 

 [***] 
  

					
	Table 5-19. PEP Requirements
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]

  

			
	Exhibit B2	  	 Version 5.5

4/27/07

	 5-5

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

 5.5 ATC PROCESSOR REQUIREMENTS (CFE) 

 

					
	Table 5-20. Imposed Requirements for the CFE ATC Processor and NAS
			
	 Section
	  	 Reference
	  	 Requirement

	 [***]
	  	[***]	  	1. [***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]

  

			
	Exhibit B2	  	 Version 5.5

4/27/07

	 5-6

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	TerreStar CHIPSET Functional Requirements	  	 

  

 6.0 SCHEDULE OF FEATURE RELEASES 

 

			
	 Release
	  	 Feature

	[***]	  	[***]
	[***]	  	[***]
	[***]	  	[***]
	[***]	  	[***]
	[***]	  	[***]
	[***]	  	[***]
	[***]	  	[***]
	[***]	  	[***]
	[***]	  	[***]
	[***]	  	[***]
	[***]	  	[***]
	[***]	  	[***]
	[***]	  	[***]
	[***]	  	[***]
	[***]	  	[***]
	[***]	  	[***]
	[***]	  	[***]
	[***]	  	[***]
	[***]	  	[***]
	[***]	  	[***]
	[***]	  	[***]
	[***]	  	[***]
	[***]	  	[***]
	[***]	  	[***]
	[***]	  	[***]
	[***]	  	[***]
	[***]	  	[***]

 [***] 

 

			
	Exhibit B2	  	 Version 5.5

4/27/07

	 6-1

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	EXECUTION COPY
	TerreStar CHIPSET Functional Requirements	  	 

  

 7.0 ACRONYMS AND ABBREVIATIONS 

 

			
	 Acronym
	  	 Description

	3G	  	The wireless technology deployed in the W-CDMA/UMTS network.
	3GPP	  	Third-Generation Partnership Project
	ADC	  	Analog to Digital Converter
	API	  	Application Programming Interface
	ARM	  	Advanced RISC Machine
	ARQ	  	Automatic Repeat reQuest
	[***]	  	[***]
	ATC	  	Ancillary Terrestrial Component
	[***]	  	[***]
	BCCH	  	Broadcast Control Channel
	BER/FER	  	Bit Error Rate/Frame Error Rate
	BMC	  	Broadcast Multicast Control
	BP	  	Baseband Processor
	CMOS	  	Complementary Metal Oxide Semiconductor
	CPLD	  	Complex Programmable Logic Device
	DAC	  	Digital to Analog Converter
	[***]	  	[***]
	[***]	  	[***]
	EVM	  	Error Vector Magnitude

  

			
	Exhibit B2	  	 Version 5.5

4/27/07

	 7-1

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	EXECUTION COPY
	TerreStar CHIPSET Functional Requirements	  	 

  

			
	 Acronym
	  	 Description

	FEC	  	Forward Error Correction
	FPGA	  	Field Programmable Gate Array
	FTP	  	File Transfer Protocol
	GMM	  	GPRS Mobility Management
	GMMAS-SAP	  	GPRS Mobility Management SAP
	GMR	  	GEO Mobile Radio
	GMR-3G	  	GEO Mobile Radio
3rd Generation
	GPIO	  	General Purpose Input Output
	GPRS	  	General Packet Radio Service
	GPS	  	Global Positioning System
	GSM	  	Global System for Mobile Communications
	GSMS	  	GPRS Short Message Service
	ICD	  	Interface Control Document
	IP	  	Internet Protocol
	LDPC	  	Low-Density Parity-Check
	MAC	  	Media Access Control
	[***]	  	[***]
	MIMO	  	Multiple Input Multiple Output
	MIPS	  	Million Instructions Per Second
	MM	  	Mobility Management
	MMI	  	Man Machine Interface

  

			
	Exhibit B2	  	 Version 5.5

4/27/07

	 7-2

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	EXECUTION COPY
	TerreStar CHIPSET Functional Requirements	  	 

  

			
	 Acronym
	  	 Description

	MSS	  	Mobile Satellite Service
	NAS	  	Non-Access Stratum
	NVRAM	  	Non-Volatile Random Access Memory
	[***]	  	[***]
	[***]	  	[***]
	PA	  	Power Amplifier
	PDCP	  	Packet Data Convergence Protocol
	C-PDR	  	Chipset Preliminary Design Review
	PEP	  	Performance Enhancement Proxy
	PHY	  	Physical Layer
	PLL	  	Phase Lock Loop
	PTT	  	Push to Talk
	QoS	  	Quality of Service
	QPSK	  	Quadrature Phase-Shift Keying
	R2	  	Release 2
	RAB	  	Radio Access Bearer
	RABM	  	Radio Access Bearer Management
	RABMAS-SAP	  	Radio Access Bearer Management SAP
	RAM	  	Random Access Memory
	RAN	  	Radio Access Network
	RF	  	Radio Frequency

  

			
	Exhibit B2	  	 Version 5.5

4/27/07

	 7-3

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	EXECUTION COPY
	TerreStar CHIPSET Functional Requirements	  	 

  

			
	 Acronym
	  	 Description

	RLC	  	Radio Link Control
	RMII	  	Reduced Media Independent
	RRC	  	Radio Resource Controller
	RSSI	  	Received Signal Strength Indication
	RTOS	  	Real Time Operating System
	RX ADC	  	Receiver Analog to Digital Converter
	SAP	  	Service Access Point
	SAT	  	Satellite
	S-BSS	  	Satellite Base Station Subsystem
	SM	  	Session Management
	SoC	  	System-on-Chip
	SPI	  	Serial Peripheral Interface
	SS	  	Supplementary Services
	TBD	  	To Be Determined
	TX DAC	  	Transmitter Digital to Analog Converter
	UART	  	Universal Asynchronous Receiver Transmitter
	UE	  	User Equipment
	UE SW	  	User Equipment Software
	UMTS	  	Universal Mobile Telecommunications System
	UMTS NAS	  	UMTS Non-Access Stratum
	USB	  	Universal Serial Bus

  

			
	Exhibit B2	  	 Version 5.5

4/27/07

	 7-4

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	EXECUTION COPY
	TerreStar CHIPSET Functional Requirements	  	 

  

			
	 Acronym
	  	 Description

	USIM	  	Universal Subscriber Identity Module
	VDD	  	Voltage dd
	VoIP	  	Voice over IP

  

			
	Exhibit B2	  	 Version 5.5

4/27/07

	 7-5

TERRESTAR PROPRIETARY

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TERRESTAR SATELLITE BASE STATION SUBSYSTEM PRICE

AND PAYMENT MILESTONE SCHEDULE
	  	 

  

 Exhibit C 

TerreStar Satellite Base Station Subsystem 

(S-BSS) 

Price and Payment Milestone Schedule 
  

			
	 Hughes Doc. # H35516, Version 5.1.
	  	June 10, 2009

  

			
	 Hughes Network Systems, LLC
	  	
	 11717 Exploration Lane
	  	
	 Germantown, Maryland 20876
	  	  

		
	 TerreStar Networks, Inc.
	  	
	 One Discovery Place
	  	
	 12010 Sunset Hills Road, 6th Floor
	  	
	 Reston, Virginia 20190
	  	  

		  	Vincent Loiacono, Chief Accounting Officer

  

			
	Exhibit C	  	 Version 5.1

06/18/09
 Page 1 of
10

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TERRESTAR SATELLITE BASE STATION SUBSYSTEM PRICE

AND PAYMENT MILESTONE SCHEDULE
	  	 

  

	
	This document contains data and information proprietary to Hughes Network Systems, LLC and TerreStar
Networks Inc. This data is being furnished pursuant to the provisions of the Contract between TerreStar Networks Inc. and Hughes Network Systems, LLC for the TerreStar Satellite Base Station Subsystem. Hughes Network Systems, LLC and
TerreStar Networks Inc. shall have the right to duplicate, use or disclose the data and information to the extent specified in the Contract.

  

			
	Exhibit C	  	 Version 5.1

06/18/09
 Page 2 of
10

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TERRESTAR SATELLITE BASE STATION SUBSYSTEM PRICE

AND PAYMENT MILESTONE SCHEDULE
	  	 

  

 Revision History 

 

							
	 Date
	  	Version	  	 Description
	  	Author
	 2/6/07
	  	4.0	  	Initial Release and Contract Execution Copy	  	[***]
	 1/31/08
	  	4.1	  	Incorporate CCN #6	  	[***]
	 5/22/08
	  	4.2	  	Incorporate CN #	  	[***]
	 6/17/08
	  	4.3	  	Amend 2 Final Version	  	[***]
	 2/20/09
	  	5.0	  	Amend 3	  	[***]
	 6/18/09
	  	5.1	  	Amendment 4 (Including Satellite Launch July 8, 2010)	  	[***]
	 7/8/09
	  	5.2	  	Changed Milestone 13 to AP	  	[***]

  

			
	Exhibit C	  	 Version 5.1

06/18/09
 Page 3 of
10

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TERRESTAR SATELLITE BASE STATION SUBSYSTEM PRICE

AND PAYMENT MILESTONE SCHEDULE
	  	 

  

 TABLE OF CONTENTS 

 

					
	 SECTION
	  	 	  	PAGE
	 REVISION HISTORY
	  	3
	1.1	  	PURPOSE AND SCOPE	  	6
	1.2	  	DOCUMENT HIERARCHY	  	6
			
	2.0	  	PRICE SCHEDULE	  	7
	2.1	  	PRICE SCHEDULE	  	7
	2.1.1	  	SBSS Baseline Price	  	7
	2.1.2	  	SBSS Options Prices	  	8
			
	3.0	  	PAYMENT PLAN	  	10
	3.1	  	PAYMENT PLAN	  	10

  

			
	Exhibit C	  	 Version 5.1

06/18/09
 Page 4 of
10

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TERRESTAR SATELLITE BASE STATION SUBSYSTEM PRICE

AND PAYMENT MILESTONE SCHEDULE
	  	 

  

 LIST OF TABLES 

 

					
	 TABLE
	 	 	  	PAGE
	Table 1-1.	 	Document Hierarchy	  	6
	Table 2-1.	 	S-BSS Baseline Price	  	7
	Table 2-2.	 	S-BSS Options	  	8
	Table 2-3.	 	S-BSS O3M Options	  	8
	Table 2-4.	 	S-BSS P6M Options	  	9

  

			
	Exhibit C	  	 Version 5.1

06/18/09
 Page 5 of
10

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	 TERRESTAR SATELLITE BASE STATION SUBSYSTEM PRICE

AND PAYMENT MILESTONE SCHEDULE
	  	 

  

 1.1 PURPOSE AND SCOPE 

This Exhibit covers the Price Schedule and Payment Plan for the work that will be performed by Hughes Network Systems, LLC (the Contractor) for the
design, development, fabrication, implementation, integration, delivery, performance verification, and testing of the Satellite Base Station Subsystem (S-BSS). 

1.2 DOCUMENT HIERARCHY 

Table 2-1. Document Hierarchy 
  

					
	 No.
	    	 Document
	  	 Content

	1.	    	Contract	  	Terms and Conditions
			
	2.	    	Exhibit A	  	Statement of Work
			
	3.	    	Exhibit B	  	S-BSS Technical Specification
			
	4.	    	Exhibit C	  	Price Schedule
			
	5.	    	Exhibit D	  	Options

  

			
	Exhibit C	  	 Version 5.1

06/18/09
 Page 6 of
10

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	 TERRESTAR SATELLITE BASE STATION SUBSYSTEM PRICE

AND PAYMENT MILESTONE SCHEDULE
	  	 

  

 2.0 PRICE SCHEDULE 

2.1 PRICE SCHEDULE 

2.1.1 SBSS Baseline Price 

Table 2-1. S-BSS Baseline Price 
  

						
	 Item
	  	 Description
	  	Price
	1	  	[***]	  	 	[***]
		  	[***]	  	 	[***]
		  	[***]	  	 	[***]
		  	[***]	  	 	[***]
		  	[***]	  	 	[***]
		  	[***]	  	 	[***]
		  	[***]	  	 	[***]
		  	[***]	  	 	[***]
		  	[***]	  	 	[***]
		  	[***]	  	 	[***]
		  	[***]	  	 	[***]
			
	2	  	[***]	  	 	[***]
			
	3	  	[***]	  	 	[***]
			
	4	  	[***]	  	 	[***]
			
	5	  	[***]	  	 	[***]
			
	6	  	[***]	  	 	[***]
			
	7	  	[***]	  	 	[***]
			
	8	  	[***]	  	 	[***]
			
	9	  	[***]	  	 	[***]
			
	10	  	[***]	  	 	[***]
			
	11	  	[***]	  	 	[***]
			
	12	  	[***]	  	 	[***]
			
	13	  	[***]	  	 	[***]
			
	14	  	[***]	  	 	[***]
		  	TOTAL PURCHASE PRICE	  	$	 46,050,767

  

			
	Exhibit C	  	 Version 5.1

06/18/09
 Page 7 of
10

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	 TERRESTAR SATELLITE BASE STATION SUBSYSTEM PRICE

AND PAYMENT MILESTONE SCHEDULE
	  	 

  

 2.1.2 SBSS Options Prices 

Table 2-2. S-BSS Options 
  

					
	 1
	  	[***]	  	[***]
	 2
	  	[***]	  	[***]
	 3
	  	[***]	  	[***]
		  	Equipment	  	
		  	Installation and Travel	  	
		  	Test and Integration	  	

 The following options defined as O3M (Option to be priced in 3 Months) in Table 2-6 of the Technical
Specifications and schedule shall be priced at EDC + 3 months: 
 Table 2-3. S-BSS O3M Options 

 

					
	1	  	[***]	  	[***]
	2	  	[***]	  	[***]
		  		  	[***]
	3	  	[***]	  	[***]
		  		  	[***]
	4	  	[***]	  	[***]
		  		  	[***]
	5	  	[***]	  	[***]
	6	  	[***]	  	[***]

 [***] 

 

			
	Exhibit C	  	 Version 5.1

06/18/09
 Page 8 of
10

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	 TERRESTAR SATELLITE BASE STATION SUBSYSTEM PRICE

AND PAYMENT MILESTONE SCHEDULE
	  	 

  

 Table 2-4. S-BSS P6M Options 

 

					
	1	  	[***]	  	[***]
			
	2	  	[***]	  	[***]
			
	3	  	[***]	  	[***]

  

			
	Exhibit C	  	 Version 5.1

06/18/09
 Page 9 of
10

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	
	 TERRESTAR SATELLITE BASE STATION SUBSYSTEM PRICE

AND PAYMENT MILESTONE SCHEDULE
	  	 

  

 3.0 PAYMENT PLAN 

3.1 PAYMENT PLAN 
  

									
	 Number
	  	 Payment Milestone
	  	Value	 	Approximate
Date	 	Estimated
Calendar Date
	1	  	[***]	  	[***]	 	[***]	 	[***]
	2	  	[***]	  	[***]	 	[***]	 	[***]
	3	  	[***]	  	[***]	 	[***]	 	[***]
	4	  	[***]	  	[***]	 	[***]	 	[***]
	5	  	[***]	  	[***]	 	[***]	 	[***]
	6	  	[***]	  	[***]	 	[***]	 	[***]
	7	  	[***]	  	[***]	 	[***]	 	[***]
	8a	  	[***]	  	[***]	 	[***]	 	[***]
	8b	  	[***]	  	[***]	 	[***]	 	[***]
	9a	  	[***]	  	[***]	 	[***]	 	[***]
	9b	  	[***]	  	[***]	 	[***]	 	[***]
	9c	  	[***]	  	[***]	 	[***]	 	[***]
	10a	  	[***]	  	[***]	 	[***]	 	[***]
	10b	  	[***]	  	[***]	 	[***]	 	[***]
	10c	  	[***]	  	[***]	 	[***]	 	[***]
	11	  	[***]	  	[***]	 	[***]	 	[***]
	12a	  	[***]	  	[***]	 	[***]	 	[***]
	12b	  	[***]	  	[***]	 	[***]	 	[***]
	12c	  	[***]	  	[***]	 	[***]	 	[***]
	12d	  	[***]	  	[***]	 	[***]	 	[***]
	13	  	[***]	  	[***]	 	[***]	 	[***]
	14	  	[***]	  	[***]	 	[***]	 	[***]
		  	Total	  	46,050,767	 		 	

  

			
	Exhibit C	  	 Version 5.1

06/18/09
 Page 10 of
10

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	TERRESTAR CHIPSET PAYMENT MILESTONE SCHEDULE	  	 

  

 Exhibit C2 

TerreStar Chipset 

Price and Payment Milestone Schedule 
  

			
	 Version 3.3
	  	June 25, 2009

  

			
	 Hughes Network Systems, LLC
	  	
	 11717 Exploration Lane
	  	
	 Germantown, Maryland 20876
	  	  

		
	 TerreStar Networks Inc.
	  	
	 One Discovery Place
	  	
	 12010 Sunset Hills Road, 6th Floor
	  	
	 Reston, Virginia 20190
	  	  

		  	Vincent Loiacono, Chief Accounting Officer

 

This document contains data and information proprietary to TerreStar Networks Inc. and Hughes Network
Systems, LLC. This data is being furnished pursuant to the provisions of the Contract between TerreStar Networks Inc. and Hughes Network Systems, LLC for the TerreStar Satellite Base Station Subsystem. Hughes Network Systems, LLC and TerreStar
Networks Inc. shall have the right to duplicate, use or disclose the data and information to the extent specified in the Contract and herein. 

			
	Exhibit C2	  	 Version 3.3

06/25/09
 Page 1 of 9

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	TERRESTAR CHIPSET PAYMENT MILESTONE SCHEDULE	  	 

  

	
	Information included in this Exhibit may contain technical data controlled by the Export
Administration Regulations (“EAR”) and/or the International Traffic in Arms Regulations (“ITAR”). This document has not been cleared for export or transfer to a Foreign Person or foreign entity.

 

			
	Exhibit C2	  	 Version 3.3

06/25/09
 Page 2 of 9

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	TERRESTAR CHIPSET PAYMENT MILESTONE SCHEDULE	  	 

  

 TABLE OF CONTENTS 

 

					
	 SECTION
	  	PAGE
	 1.1
	 	 PURPOSE AND SCOPE
	  	5
	 1.2
	 	 DOCUMENT HIERARCHY
	  	5
			
	 2.0
	 	 PRICE SCHEDULE
	  	6
	 2.1
	 	 CHIPSET BASELINE PRICE
	  	6
	 2.2
	 	 CHIPSET OPTION PRICES
	  	7
			
	 3.0
	 	 CHIPSET PAYMENT PLAN
	  	8

  

			
	Exhibit C2	  	 Version 3.3

06/25/09
 Page 3 of 9

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	TERRESTAR CHIPSET PAYMENT MILESTONE SCHEDULE	  	 

  

 LIST OF TABLES 

 

					
	 TABLE
	 	 	  	PAGE
	 Table 1-1.
	 	 Document Hierarchy
	  	5

  

			
	Exhibit C2	  	 Version 3.3

06/25/09
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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	TERRESTAR CHIPSET PAYMENT MILESTONE SCHEDULE	  	 

  

 1.1 PURPOSE AND SCOPE 

This Exhibit covers the Price Schedule and Payment Plan for the work that will be performed by Hughes Network Systems, LLC (the Contractor) for the
design, development, fabrication, implementation, integration, delivery, performance verification, and testing of 2 Phases for the TerreStar Chipset. 

1.2 DOCUMENT HIERARCHY 
  

					
		    	Table 1-1. Document Hierarchy	  	
			
	 No.
	    	 Document
	  	 Content

			
	1.	    	Contract	  	Terms and Conditions
			
	2.	    	Exhibit A	  	S-BSS Statement of Work
			
	3	    	Exhibit A2	  	Chipset Statement of Work
			
	4.	    	Exhibit B	  	S-BSS Technical Specifications
			
	5.	    	Exhibit B2	  	Chipset Technical Specifications
			
	6.	    	Exhibit C	  	S-BSS Price Schedule
			
	7.	    	Exhibit C2	  	Chipset Price Schedule
			
	8.	    	Exhibit D	  	S-BSS Options
			
	9.	    	Exhibit D2	  	Chipset Options

  

			
	Exhibit C2	  	 Version 3.3

06/25/09
 Page 5 of 9

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	TERRESTAR CHIPSET PAYMENT MILESTONE SCHEDULE	  	 

  

 2.0 PRICE SCHEDULE 

 

	 	2.1	CHIPSET BASELINE PRICE 

  

					
	 Item
	  	 Description
	  	 Price

	1	  	[***]	  	[***]
		  	[***]	  	            [***]
		  	 [***]
	  	
		  	 [***]
	  	
		  	[***]	  	            [***]
		  	 [***]
	  	
		  	 [***]
	  	
		  	[***]	  	            [***]
		  	 [***]
	  	
	2	  	[***]	  	[***]
		  	[***]	  	            [***]
		  	 [***]
	  	            [***]
		  	 [***]
	  	            [***]
		  	 [***]
	  	            [***]
		  	[***]	  	            [***]
		  	 [***]
	  	            [***]
		  	 [***]
	  	            [***]
		  	 [***]
	  	            [***]
		  	 [***]
	  	            [***]
		  	 [***]
	  	            [***]
		  	[***]	  	            [***]
		  	 [***]
	  	            [***]
		  	 [***]
	  	            [***]
	3	  	[***]	  	[***]
		  	[***]	  	
		  	[***]	  	
	4	  	[***]	  	[***]
	5	  	[***]	  	[***]
	6	  	[***]	  	[***]
		  	SUB TOTAL	  	$21,436,500

  

			
	Exhibit C2	  	 Version 3.3

06/25/09
 Page 6 of 9

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	TERRESTAR CHIPSET PAYMENT MILESTONE SCHEDULE	  	 

  

 2.2 CHIPSET OPTION PRICES 

 

					
	 Item
	 	 Description
	  	Price
	 1
	 	[***]	  	[***]
		 	 Renewable up to 6 years after November 1, 2010
	  	

  

			
	Exhibit C2	  	 Version 3.3

06/25/09
 Page 7 of 9

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	TERRESTAR CHIPSET PAYMENT MILESTONE SCHEDULE	  	 

  

 3.0 CHIPSET PAYMENT PLAN 

 

										
	Table 1-1: Chipset Payment Milestones	  
	 Number
	  	 SOW
Reference
	  	 Payment Milestone
	  	 Chipset
Amendment
Value
	 	 Date
	 
	 1
	  	[***]	  	[***]	  	[***]	 	[	***] 
	 2
	  	[***]	  	[***]	  	[***]	 	[	***] 
	 2a
	  	[***]	  	[***]	  	[***]	 	[	***] 
	 3
	  	[***]	  	[***]	  	[***]	 	[	***] 
	 4
	  	[***]	  	[***]	  	[***]	 	[	***] 
	 5
	  	[***]	  	[***]	  	[***]	 	[	***] 
	 6
	  	[***]	  	[***]	  	[***]	 	[	***] 
	 7
	  	[***]	  	[***]	  	[***]	 	[	***] 
	 8
	  	[***]	  	[***]	  	[***]	 	[	***] 
	 9
	  	[***]	  	[***]	  	[***]	 	[	***] 
	 10
	  	[***]	  	[***]	  	[***]	 	[	***] 
	 11
	  	[***]	  	[***]	  	[***]	 	[	***] 
	 12a
	  	[***]	  	[***]	  	[***]	 	[	***] 
	 12b
	  	[***]	  	[***]	  	[***]	 	[	***] 
	 12c
	  	[***]	  	[***]	  	[***]	 	[	***] 
	 12d
	  	[***]	  	[***]	  	[***]	 	[	***] 
	 13a
	  	[***]	  	[***]	  	[***]	 	[	***] 
	 13b
	  	[***]	  	[***]	  	[***]	 	[	***] 
	 16
	  	[***]	  	[***]	  	[***]	 	[	***] 
	 17
	  	[***]	  	[***]	  	[***]	 	[	***] 
	 18
	  	[***]	  	[***]	  	[***]	 	[	***] 
	 19
	  	[***]	  	[***]	  	[***]	 	[	***] 
	 20
	  	[***]	  	[***]	  	[***]	 	[	***] 
	 21
	  	[***]	  	[***]	  	[***]	 	[	***] 
	 22
	  	[***]	  	[***]	  	[***]	 		
		  	Total 	  	21,436,500	 		

  

			
	Exhibit C2	  	 Version 3.3

06/25/09
 Page 8 of 9

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	TERRESTAR CHIPSET PAYMENT MILESTONE SCHEDULE	  	 

  

									
	Table 1-2: Incremental Phase Modulator Payment Milestones
	 Number
	  	 SOW
Reference
	 	 Payment Milestone
	  	 Chipset

Amendment

Value
	 	 Date

					
	 1
	  	[***]	 	[***]	  	[***]	 	[***]
					
	 2
	  	[***]	 	[***]	  	[***]	 	[***]
					
	 3
	  	[***]	 	[***]	  	[***]	 	[***]

  

									
	Table 1-3: Oberon Integration Board Payment Milestones
	 Number
	  	 SOW
Reference
	 	 Payment Milestones
	  	 Chipset

Amendment

Value
	 	 Date

					
	 1
	  	[***]	 	[***]	  	[***]	 	[***]
					
	 2
	  	[***]	 	[***]	  	[***]	 	[***]
					
	 3
	  	[***]	 	[***]	  	[***]	 	[***]
					
	 4
	  	[***]	 	[***]	  	[***]	 	[***]
					
	 5
	  	[***]	 	[***]	  	[***]	 	[***]

  

			
	Exhibit C2	  	 Version 3.3

06/25/09
 Page 9 of 9

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem SOW

 
	  	 

  

 Exhibit A 

TerreStar Satellite Base Station Subsystem 

(S-BSS) 

Statement of Work 

TSN_SAT_2_REQ-Satellite Base Station Subsystem SOW V 3.2 

June 26, 2009 
  

			
	Hughes Network Systems, LLC	  	
	11717 Exploration Lane	  	
	Germantown, Maryland 20876	  	
		  	  

	TerreStar Networks, Inc.	  	
	One Discovery Place	  	
	12010 Sunset Hills Road, 6th Floor	  	
	Reston, Virginia 20190	  	  

		  	Vincent Loiacono, Chief Accounting Officer

  

	
	
This document contains data and information proprietary to TerreStar Networks Inc. This data is being furnished pursuant to the
provisions of the Contract between TerreStar Networks Inc. and Hughes Network Systems, LLC for the TerreStar Satellite Base Station Subsystem. Hughes Network Systems, LLC and TerreStar Networks Inc. shall have the right to duplicate, use or disclose
the data and information to the extent specified in the Contract and herein.
  

	 This document contains information subject
to the U.S. Export Administration Regulations (EAR). Re-export or retransfer not in conjunction with the U.S. EAR is prohibited.
  

 

			
	Use or disclosure of the data contained on this sheet is subject to the restriction on the title page.	  	 Version 3.2

6/25/09

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem SOW

 
	  	 

  

 Revision History 

 

							
	 Date
	  	Version	  	 Description
	  	Author
	1/31/07	  	1.0	  	Initial Release	  	[***]
	1/31/07	  	1.1	  	Changed KOR/SRR to 45 days after go ahead	  	[***]
	2/2/07	  	1.2	  	Added Clarification to Acceptance Criteria	  	[***]
	2/06/07	  	1.3	  	Renamed to correct Execution Copy Errors	  	[***]
	2/07/07	  	1.4	  	Clarified Acceptance Criteria for the TVR and ORR	  	[***]
	2/09/07	  	1.5	  	Changed the Export Control Language to eliminate ITAR	  	[***]
	1/31/08	  	2.0	  	 Incorporated CCN #6
 Removed
references to Release 1 Alpha
 Minor editorial updates
	  	[***]
	5/1/08	  	2.1	  	Updated milestones for extended schedules. Added upgrade and rollback of releases.	  	[***]
	6/6/08	  	2.2	  	Amendment 2 Update for extended schedule	  	[***]
	6/13/08	  	2.3	  	Further Amendment 2 Updates	  	[***]
	6/17/08	  	2.4	  	Final Amendment 2 Changes	  	[***]
	2/05/09	  	3.0	  	Amendment 3 Changes	  	[***]
	4/3/09	  	3.1	  	Amendment 4 Changes (Including Launch Date of July 8,2009)	  	[***]
	6/26/09	  	3.2	  	TSN Feedback from 3.1	  	[***]
	7/8/09	  	3.3	  	TSN/HNS agreed clarifications	  	[***]

  

			
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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem SOW

 
	  	 

  

 Table of Contents 

 

					
	Revision History	  	
	Table of Contents	  	
	1	  	Introduction	  	4
	  1.1	  	Purpose and Objective	  	4
	  1.2	  	Scope	  	4
	2	  	Applicable Specifications	  	5
	3	  	Requirements	  	6
	  3.1	  	General Requirements	  	6
	  3.2	  	Program Management	  	7
	  3.3	  	System Design and Development	  	10
	  3.4	  	Production and Implementation	  	14
	  3.5	  	Technical and Operational Verification Phase	  	15
	  3.6	  	System Deliverables	  	16
	  3.7	  	Deployment	  	17
	  3.8	  	Technical Verification	  	17
	  3.9	  	Operational Verification	  	17
	  3.10	  	First Call	  	18
	  3.11	  	Documentation	  	18
	  3.12	  	Training	  	24
	  3.13	  	Customer Furnished Equipment	  	24
	4	  	Project Schedule	  	26
	  4.1	  	General	  	26
	  4.2	  	Program Milestones	  	26
	  4.3	  	Operational Verification	  	29
	  4.4	  	Operational Capability	  	31

  

			
	Figure 3-1 S-BSS Test Objectives	  	16
	Figure 3-2 Contract Deliverable Schedule	  	18
	Figure 3-3 Documentation Specification Tree	  	23
	Figure 4-1 High Level S-BSS Project Schedule	  	26
	Figure 4-2 Technical Meetings	  	27
	Figure 4-3 Integration and Test High Level Schedule	  	28
	Figure 4-4 Operational Verification High Level Schedule	  	30

  

			
	Use or disclosure of the data contained on this sheet is subject to the restriction on the title page.	  	 Version 3.2

6/25/09

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
  
	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem SOW

 
	  	 

  

 1 Introduction 

1.1 Purpose and Objective 

This statement of work (SOW) defines the program partnership, tasks, deliverable data, and schedules for the design, development,
manufacture, installation, test, integration with the TerreStar Network (TSN) and the ongoing support of the satellite base station subsystem. The SOW defines the design, development, integration, test, deployment, integration with the TSN, and
operational verification of two Functionality Releases anticipated for full S-BSS functionality. At Provisional and Final Acceptance an operations and maintenance (O&M) handover shall occur. 

1.2 Scope 

Contractor shall develop the satellite base station subsystem (S-BSS) within the satellite segment of the TSN. The satellite segment
includes the [***]. The development of the two functionality releases shall include all tasks necessary to bring the S-BSS into Initial Operational Capability and Full Operational Capability as a part of the TSN and shall progressively add
functionality until full S-BSS functionality is attained. These tasks include: 
  

	 	•	 	 S-BSS Operational Concepts Development 

  

	 	•	 	 S-BSS Design, Development, Fabrication, Spare Parts, Implementation, Integration and Test 

 

	 	•	 	 S-BSS Delivery and Technical and Operational Performance Verification 

 

	 	•	 	 Satellite Segment Integration and Test 

  

	 	•	 	 Documentation 

  

	 	•	 	 Training 

  

	 	•	 	 Program Management 

The S-BSS interfaces with the [***]. It shall include a [***] defined in Exhibit B, TSN_SAT_2_TRD-S-BSS Functional Requirements. The S-BSS
interfaces to [***]. The S-BSS shall be composed of two components of equipment located at the satellite gateways in Ontario, Canada, and North Las Vegas, Nevada (NLV) and an S-BSS Test Bed located at a TerreStar facility to be identified prior to
shipment. 
  

			
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	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem SOW

 
	  	 

  

 2 Applicable Specifications 

The S-BSS development shall conform to the requirements in the following specifications. 

[***] 

The following documents are included as reference documents to ensure all components of the satellite segment are designed in a consistent
manner where applicable. 
 [***] 
  

			
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	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem SOW

 
	  	 

  

 3 Requirements 

3.1 General Requirements 

3.1.1 S-BSS Development 

The Contractor shall perform all tasks necessary to design, prototype, develop, implement, install, test, and operationally deploy a
satellite base station subsystem which meets the requirements set forth in this SOW, the TSN_SAT_2_TRD-S-BSS Functional Requirements, and the other documents that comprise the S-BSS contract. To facilitate a progressive development of S-BSS
functionality, the S-BSS project shall include a succession of two functionality releases as defined in Exhibit B, TSN_SAT_2_TRD-S-BSS Functional Requirements. The definitions contained in the Exhibit B were determined based on the following
TerreStar requirements. (Note: Release 1 is separated into 3 point releases defined below) Release 1.0 shall contain the capacity and functionality that TerreStar requires to perfect the Mobile Satellite Services (MSS) Spectrum no later than the end
of the second quarter of 2009. [***]. The following are the major program milestones: 
 [***] 

Functionality Release 1 shall have a SRR/PDR and Release 1 and 2 shall have a, CTS, Technical Verification Test (TVT) and Operational
Verification Test (OVT) in accordance with sections 3.2 and 3.5 with acceptance of the Release occurring after successful completion of Operational Verification. (Release 1.0 shall have an SRR/PDR, CDR, and CTS. Release 1.1 and 1.5 shall have a TVT
and OVT) After installation of the Canadian S-BSS, a mutually agreed Release 2 OVT Regression Test that shall consist of a subset of the Release 2 OVT shall be conducted followed by a Canadian gateway ORR. Functionality Release 1.1, 1.5, and 2 shall
include documentation updates for all affected S-BSS documents defined in section 3.10 in accordance with the schedule defined in Figure 3-2 Contract Deliverable Schedule. Final Acceptance shall include all documentation updates for all affected
documents defined in section 3.11 in accordance with the schedule defined in Figure 3-2 Contract Deliverable Schedule. The dates for the SRR/PDR and CDR shall be determined by mutual consent. 

Network capacity for each Operational Verification Test or OVT Regression Test shall be as follows: 

[***] 

The network capacity at each gateway shall be capable of being used within any of the 550 nominal satellite beams required to cover the
Primary and Secondary coverage areas as defined in the satellite specification, in any amount of bandwidth, as selected by TerreStar. 

Release 1 Structure for Point Releases 

The SBSS will contain 3 point releases for Release 1 in order to phase in functionality.(Please refer to Exhibit B for the technical
details.) 
 Release 1.0 contains feature-set required for the First Call Test and supports single beam functionality.

 Release 1.1, contains the basic feature-set for TerreStar’s initial product launch, including narrowband voice and data
and supporting 280 beams. Release 1.1 will be tested during TVT-1.1. 
 Release 1.5 contains additional features as described in
Exhibit B and will be tested during TVT-1.5. 
  

			
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 3.1.2 Acceptance 

There will be three acceptance milestones for the S-BSS. 
  

	 	•	 	 Provisional Acceptance includes the following functionality: [***] 

 

	 	•	 	 Operational Acceptance for Release 2 software functionality as defined in Exhibit B [***] 

 

	 	•	 	 Final Acceptance including the following: [***] 

3.1.3 Operations and Maintenance Handover 

The Contractor shall provide the necessary documentation in accordance with section 3.11 and training in accordance with section 3.12 to
transition O&M responsibility to TerreStar. The documentation and training shall be provided during the Operational Verification Phase for handover of O&M responsibilities for Release 1.1 Functionality at Provisional Acceptance. The
documentation and training shall be provided during the Operational Verification Phase for handover of O&M responsibilities at Operational Acceptance of Release 2 software functionality. All Release 2 functionality shall be tested using a
TerreStar-provided UT by Final Acceptance. Operational Acceptance of Release 2 software functionality includes an upgrade and regression test of the NLV S-BSS. The Contractor shall demonstrate upgrade and regression procedures in the lab.

 Note: In the event the TerreStar provided UT does not support the contracted SBSS functionality, the above mentioned tests
will be performed in a lab environment in accordance with an agreed upon test plan. Where functional testing is not feasible, the Contractor shall inform TerreStar of the reduced testplan and TerreStar acceptance shall not be unreasonably withheld
due to the reduced testplan. 
 3.2 Program Management 

3.2.1 Program Management Organization 

3.2.1.1 Program Manager 

The Contractor shall assign a full time program manager who has the responsibility for accomplishment of all the tasks defined in this
SOW. This shall include planning, directing, controlling and reporting progress on all program activities from contract award through Operational Acceptance. 

The Program Manage shall be supported by an Engineering Manager/Chief System Engineer with responsibility for all technical tasks defined
in this SOW. 
 3.2.1.2 Subcontracts 

If the Contractor elects to subcontract portions of the contract, the Contractor shall provide technical and administrative subcontract
management sufficient to ensure successful performance of all subcontracts. Successful performance is delivery of the required products on time, with full compliance to the technical specifications. Procurement specifications shall be generated for
all subcontracts to assure compliance 
  

			
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with the standards and requirements of this contract. The Contractor shall ensure that maintenance and support is provided, either by his own or subcontractor personnel, for the duration of the
Operational Verification Phases. 
 3.2.1.3 Program Communications 

The Program Manager shall be the principal interface between the Program and the Contractor’s corporate organization, the Contractor
and Subcontractors (if applicable), and between the Contractor and the TerreStar Program Office for all matters relating to the contract. The Program Manager shall also serve as the focal point for the identification and resolution of all problems.

 3.2.2 Program Plans 

3.2.2.1 Program Management Plan 

The Contractor shall prepare and submit a Program Management Plan (PMP) describing the S-BSS Program activities. The plan, at a minimum,
shall describe the organizational structure and the contractual and technical lines of communication; define program responsibilities; describe the management objectives and priorities and any risk areas; describe the risk management process;
personnel and staffing profiles and any plans for using subcontractors; describe all program interfaces, including any subcontractor interfaces; describe the documentation control and configuration management processes; and describe the quality
assurance processes. 
 The Contractor shall submit a Preliminary PMP with the Contractor’s proposal. The Final PMP shall be
submitted at the Kick-Off Meeting. The Program Manager shall manage the S-BSS program in accordance with the approved PMP. 

3.2.2.2 Program Schedule 

The Contractor shall develop and maintain a Master Phasing Schedule and Detailed Program Schedules. The Master Phasing Schedule shall
clearly identify all key milestones including all hardware, software, and data deliveries, all customer furnished items and the date required, major technical and programmatic reviews, and all TerreStar milestones that are dependent on S-BSS
deliveries. The Detailed Program Schedules shall be used by the contractor to plan all tasks, task dependencies, and critical path. The Detailed Program Schedules shall be updated monthly to reflect program progress and provided to the TerreStar PMO
with the monthly status report. 
 3.2.3 Program Management Reviews, Meetings, and Status Reports

 3.2.3.1 Kick-Off Meeting 

The Contractor shall conduct a Program Kick-Off Meeting 45 days after letter contract go ahead to ensure a mutual understanding on all
contractual requirements incorporated into the negotiated contract and the Contractor’s Program Plan. The meeting shall review the total program including contractual, technical, schedule, business conduct and risk and mitigation plans.
Business conduct subjects would include topics such as: lines of authority and communication, meeting formats, TerreStar/Contractor Responsibilities, scope change process, etc. The Contractor shall deliver a Kick-Off Meeting data package one week
prior to the meeting that includes all the draft, preliminary, and final documents listed in Figure 3-2 Contract Deliverable Schedule. 
  

			
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 3.2.3.2 Program Status 

The Contractor shall provide TerreStar full visibility into all S-BSS contractual efforts through both formal and informal communications.
The formal communications shall be in the form of monthly program reviews, ad hoc meetings to discuss contractual issues, and monthly written reports. The PMP shall specify which metrics will be used to certify milestone completion. 

3.2.3.3 Monthly Program Management Reviews 

The Contractor shall conduct Monthly Program Management Reviews (PMR) to present a summary of major accomplishments, problems and
concerns, and status the Master Phasing Schedule. All technical, schedule and management problem areas shall be identified and discussed with risk and risk mitigation efforts detailed. The schedule review shall include a comparison of the work
planned to the work accomplished, an update on staffing status, and a discussion of the activities planned for the next month. The Contractor shall provide summary Project Status Reports at the PMRs. Action items shall be assigned and recorded in an
Action Item Log with specific closure dates for each item and a person responsible for resolving the action. All recently closed or on-going action items from previous reviews shall be individually reviewed and discussed. If the Contractor team
includes any subcontractors, the monthly reviews shall include a review of the individual subcontractor major accomplishments and problems and concerns, including an update on the schedule progress. 

The PMR shall be held in a face-to-face meeting at least once every three months at a mutually agreed location. Other venues for this
meeting can be teleconferences, web meetings, video conferences, etc. 
 The Contractor shall generate an agenda for each PMR and
provide a copy to TerreStar one week prior to the review. The Contractor shall generate minutes of the PMRs, including the current status of the Action Item Log, and deliver a copy to TerreStar within one week after the review. 

3.2.3.4 Additional Management Reviews 

Additional program management meetings shall be scheduled as required to insure TerreStar is fully apprised of status and risk issues that
might impact S-BSS functionality or delivery date. 
 3.2.4 Technical Reviews, Meetings, and Reports 

3.2.4.1 General 

The Contractor shall conduct formal reviews to provide TerreStar an assessment of system performance. These reviews shall include a System
Requirements Review (SRR), a Preliminary Design Review (PDR), A Critical Design Review (CDR) a Consent-to-Ship Test Review, an Operational Readiness Review, and an Operational Acceptance Review. 

3.2.4.2 SRR 

The Contractor shall conduct the SRR at a mutually agreed time to select and present the design concept, to review preliminary trade study
results, prototype status, the program schedule, and risk reduction efforts, and to identify S-BSS Configuration Items (CIs). The Contractor shall deliver an SRR Data Package one week prior to the meeting that includes all the draft, preliminary,
and final documents listed in Figure 3-2 Contract Deliverable Schedule. 
  

			
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 3.2.4.3 PDR 

The Contractor shall conduct a PDR at a mutually agreed time. The Contractor shall review the preliminary design and the air interface,
link budgets, demonstrate achievability of critical designs, and present the final S-BSS requirements, the final prototyping results of all critical units, the Master Phasing Schedule, the risk assessment and the risk mitigation plans. The
Contractor shall deliver a PDR data package two weeks prior to the meeting that includes all the draft, preliminary, and final documents listed in Figure 3-2 Contract Deliverable Schedule. 

3.2.4.4 CDR 

The Contractor shall conduct a CDR at a mutually agreed time. The Contractor shall present data that verifies the final design meets the
S-BSS Performance Specification, including link budgets, the results of all remaining trade studies, the PDR risk mitigation results, the program master schedule, and the subsystem deployment plan including operational facility modifications and
support. The Contractor shall deliver a CDR data package two weeks prior to the meeting that includes all the draft, preliminary, and final documents listed in Figure 3-2 Contract Deliverable Schedule. 

3.2.4.5 Consent to Ship 

The Contractor shall conduct a CTS Review to present the results of the system integration and test activities and the status of
deployment preparations prior to shipping and installing at the operational sites. Section 4.2.7 defines the documentation required at this review. 

3.2.4.6 Meeting Minutes 

The Contractor shall provide reports and/or minutes for each of the technical reviews including a listing of action items with specific
closure dates for each item. All engineering assumptions and agreements made or reached during the technical meetings shall be documented in the minutes. 

3.2.4.7 Additional Meetings 

The Contractor or TerreStar may schedule additional meetings to provide a technical interchange on topics requiring a greater level of
detail or involvement of technical specialists. An agenda for each technical interchange meeting (TIM) shall be generated and copies distributed to all participants one week prior to the TIM. The Contractor shall prepare minutes of each TIM,
including the assigned action item list, and deliver a copy to TerreStar within one week after the TIM. 
 3.2.4.8 Readiness
Reviews 
 The Contractor shall conduct Test Readiness Reviews (TRR) prior to formal tests defined in Section 3.5 of
this SOW. 
 3.3 System Design and Development 

The Contractor shall perform the system engineering, software design and development, hardware design and development, and prototyping
efforts necessary to ensure that the S-BSS satisfies all of the functional and performance requirements set forth in the S-BSS Procurement Specification. 

3.3.1 [***] 

[***] 
  

			
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	  	AMENDMENT 4
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 3.3.2 Export Compliance Analysis 

The Contractor shall perform an analysis of the S-BSS components and shall determine the applicable export compliance regulations (e.g.
International Traffic in Arms Regulations (ITAR) or Export Authorization Regulations (EAR). A preliminary assessment shall be made by the Kick-Off Meeting. Final rulings from the appropriate export control authorities shall be received NLT PDR.

 3.3.3 System Engineering 

The Contractor shall establish a system engineering office within the S-BSS program organization and shall maintain this office throughout
the duration of the program. This office shall implement and maintain the System Design Plan submitted with the Contractor’s proposal and approved at the Kick-Off Meeting, and shall ensure that all design activities are conducted in accordance
with the provisions of the plan. 
 The system engineering office shall have the overall responsibility of ensuring that the
S-BSS is in full compliance with the functional and performance requirements contained in the System Procurement Specification, and agreed to in the CONOPS, the System Performance Specification, and the ICD. 

The Contractors system engineering office shall perform the following specific tasks and others as necessary. 

3.3.3.1 System Design 

The Contractor shall develop, in accordance with the design plan and the S-BSS Functional specification, an S-BSS concept and top level
subsystem design and shall document that design in the System Performance Specification (SPS). The system design functions shall be allocated to hardware, software, and procedures and documented in the Hardware Requirements Document, the Software
Requirements Document, and the CONOPS. 
 3.3.3.2 Common Satellite Air Interface Specification Development 

The Contractor shall develop an [***]. 

3.3.3.3 Interface Control Document 

The Contractor shall specify all external and internal interfaces in a Subsystem ICD. This document shall [***]. 

3.3.3.4 Analysis and Simulation 

The design, including the air interface and throughout, shall be verified using analysis, prototypes, simulation, and modeling. The
interim results and trade studies shall be presented at the SRR with final results and trade studies at the PDR. The Analysis and Simulation Plan shall be presented and agreed to at the Kick-Off Meeting. 

3.3.3.5 Control and Management 

The Contractor shall develop an S-BSS control and management system integrated into the Satellite Beam Access Subsystem (SBAS) Control and
Management System (CMS) to provide a single integrated control console. 
  

			
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	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem SOW

 
	  	 

  

 3.3.4 Software Design and Development 

3.3.4.1 Software Development Plan 

The Contractor shall provide a Software Deployment Plan (SDP) in accordance with paragraph 3.11.1.5 of this SOW. The S/W development shall
be managed in accordance with the SDP through delivery of all three functionality releases. 
 3.3.4.2 Contractor Developed
Software 
 The Contractor shall design, code, integrate, test, deliver, and repair all the software required for subsystem
operation and maintenance: including, software installation, S-BSS configuration, monitoring, operation, and maintenance through Operational Acceptance. The Contractor shall specify the software language to be used. 

3.3.4.3 Commercial Off-the-Shelf Software Products 

If commercial off-the-shelf (COTS) software is used in the design, it shall be products with demonstrable probability for support over the
expected life of the S-BSS in accordance with the contract. 
 3.3.4.4 Software Development 

Where Contractor-developed software or Contractor modified commercially available, off-the-shelf software is used as part of the design,
the S/W shall be developed or modified in accordance with the Contractor’s approved SDP. The Contractor shall provide all licenses and documentation required for system operation. S/W developed or modified under this contract, including all
related documentation and source code, shall be delivered as described in the Contract. 
 3.3.4.5 Software Design
Documentation 
 The Contractor shall document functional software requirements in the Software Design Specification,
validating the traceability of the requirements from the System Performance Specification. The Software Design Specification detail shall be sufficient to ensure a common understanding of the requirements; ensure that requirements are complete,
consistent, and testable; and define the inputs and outputs for every function. The software shall be designed, selected or developed to facilitate life-cycle maintenance. 

3.3.4.6 Software Test 

The Contractor shall generate and use test plans, procedures, and reports to verify that each software configuration item (SWCI) performs
in accordance with individual SWCI test specifications and the CI interface requirements. TerreStar shall have the right to observe and monitor the CI tests. Following completion of testing, the Contractor shall document the test results, deviations
from test procedures, and all software anomalies and submit a report to TerreStar. 
 The Contractor shall provide all necessary
test tools and equipment to support S-BSS integration and test and Technical and Operational Verification. 
  

			
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	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem SOW

 
	  	 

  

 3.3.5 Hardware Design and Test 

3.3.5.1 Hardware Development Plan 

The Contractor shall provide a Hardware Development Plan (HDP) in accordance with paragraph 3.10 of this SOW. The H/W development shall be
managed in accordance with the HDP through delivery of all three functionality releases of the S-BSS Program. 
 The hardware for
this program shall consist of a combination of existing COTS, modified COTS, modified Contractor equipment, and, if required, newly developed equipment. The Contractor shall use the latest version of COTS hardware components wherever possible, when
consistent with the results of analysis, reliability, availability, performance and other technical factors. The HDP shall clearly define which portions of each HWCI are in each of these categories with a justification for each selection.

 3.3.5.2 Contractor Developed Hardware 

The Contractor shall perform the planning, coordination, and implementation of the tasks required to develop the S-BSS hardware developed
tools, engineering aids, simulators, tests aids, etc. 
 All hardware designed or modified, developed, manufactured, assembled
and tested by the Contractor or its Subcontractors shall be in accordance with the requirements of the Program Product Assurance Plan. 

The Contractor shall document functional hardware requirements in the Hardware Design Specification, validating the traceability of the
requirements from the System Performance Specification. The Hardware Design Specification detail shall be sufficient to ensure a common understanding of the requirements; ensure that requirements are complete, consistent, and testable; and define
the inputs and outputs for every function. The hardware shall be designed and selected or developed to facilitate life-cycle maintenance and to permit access to facilitate replacement of components. The Contractor shall provide recommended
procedures for maintaining the equipment in the CI and System Maintenance Procedures. 
 3.3.5.3 Hardware Test

 The Contractor shall generate and utilize test plans, procedures, and reports to verify that each hardware configuration
item (HWCI) performs in accordance with individual CI test specifications and the interface requirements for each input and output port. TerreStar shall have the right to observe and monitor the CI tests. Following completion of testing, the
Contractor shall document the test results, deviations from test procedures, and all hardware anomalies and submit a report to TerreStar. 

3.3.6 Prototyping, Demonstrations, and Simulations 

3.3.6.1 Analysis and Simulation Plan 

The Contractor shall review and analyze all S-BSS requirements, [***], to determine which development activities require prototyping
and/or performance demonstrations and which requirements should be tested using simulation. The results of this review shall be documented in the Analysis and Simulation Plan and presented at the SRR. 

3.3.6.2 Simulators 

The Contractor shall develop simulator(s) in accordance with the requirements agreed to in the Analysis and Simulation Plan. The
simulator(s) shall be used for formal test activities as agreed to in the System Integration and Test Plan. The simulators shall be capable of run times that allow for rapid turn around of 

 

			
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scenarios that facilitate a thorough engineering analysis and design optimization effort. In addition, TerreStar intends to use the simulator(s) after delivery for troubleshooting, verification
of new system upgrades, and traffic loading analysis. 
 3.3.6.3 Prototyping and Demonstration Documentation 

Any prototyping or demonstrations shall be completely defined and documented by the Contractor with copies provided to TerreStar. The
results of the prototyping and demonstrations shall be documented in a report and summary data shall be presented at the PDR. TerreStar shall have the right to be present at any S-BSS performance demonstrations or simulations. 

3.4 Production and Implementation 

3.4.1 Production Process, Quality Assurance, and Configuration Management 

The Contractor shall establish a production process and be responsible for the procurement, manufacture, assembly, test and integration of
the hardware and software required for the delivery of a complete and operating S-BSS. 
 All production and implementation of
deliverable equipment shall be in accordance with the requirements of the S-BSS Hardware Development Plan, Software Development Plan, the Product Assurance Plan, and the Manufacturing Quality Assurance Plan. 

The Contractor shall be responsible for the configuration management of the Contractor controlled baseline and shall maintain
configuration management until Final Acceptance. 
 3.4.2 COTS Hardware and Software 

3.4.2.1 COTS Procurement 

The Contractor shall be responsible for the procurement of the COTS hardware and software and for the verification of its performance. All
COTS components shall be selected to facilitate life-cycle maintenance. The configuration shall permit updates and performance of preventive maintenance on a non-interference basis with operations. 

3.4.2.2 COTS Performance Verification 

The Contractor shall define the specific verification methods to be used to assure the acceptable performance of all COTS hardware and
software items selected to fulfill the S-BSS requirements. For equipment acquired from original equipment manufacturers or other vendors, one or more levels of testing may be performed in the factory according to vendor’s methods which conform
to industry standards, or according to approved procedures. Factory demonstrations, post-installation verification testing and other standard evaluation methods to ensure that acquired components operate as specified shall be identified in the
System Integration and Test Plan. Vendor-supplied documentation, including user’s guides and operation procedures, shall be validated for accuracy and completeness for S-BSS use prior to final acceptance from the vendor. 

3.4.2.3 COTS Post Installation Testing 

Following installation in the S-BSS, additional COTS functional and performance tests may be required to ensure that the item has been
properly integrated with other satellite segment components and continues 
  

			
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to operate as specified. It shall be the Contractor’s responsibility to insure ongoing system operation and performance in accordance with the requirements of the specification. 

3.4.3 S-BSS Integration 

The Contractor shall be responsible for the integration of the COTS and all manufactured elements of each CI, including the hardware and
software required for system operation, using the System Integration and Test Plan. 
 3.5
Technical and Operational Verification Phase 
 The functions and objective performance of each S-BSS Functionality Release
shall be verified during a Technical Verification Phase. This phase shall begin with CI integration and test and shall conclude with the TVT, [***]. 

3.5.1 Integration 

The Contractor shall perform integration of all hardware and software elements of all CIs comprising the S-BSS Functionality Releases. The
Contractor shall perform integration of the S-BSS with all [***]. The integration activities shall be in accordance with the Contractor developed System Integration and Test Plan (STP), and the Product Assurance Plan and shall include TerreStar
engineers under the direction of Contractor management. Full access to all System components at all times shall be granted to TerreStar personnel. 

3.5.2 Test 

3.5.2.1 General 

The Contractor shall demonstrate S-BSS Functionality Release performance in a series of formal tests and demonstrations using
simulators/emulators, and actual operational components. The formal tests shall be executed using Test Procedures approved by TerreStar and generated in accordance with the STP and the System Integration and Test Plan. The formal tests and
demonstrations shall include active TerreStar and QA participation in execution of procedures. The Contractor shall execute the following formal tests: [***]. Each formal test shall be preceded by a TRR conducted by the Contractor. During the TRR,
all aspects of the formal test shall be reviewed and assessed for readiness to start testing including personnel, hardware, software, procedures, and external coordination (i.e. satellite monitoring, external interface support, etc.). A go/no-go
assessment is made by TerreStar at the conclusion of the TRR. 
 3.5.2.2 Test Objectives 

Each Formal Test shall accomplish the following: 
  

			
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 Figure 3-1 S-BSS Test Objectives 

 

							
	 Test
	  	 Objective
	  	 Entry Criteria
	  	 Success Criteria

	 Consent-to-Ship
	  	[***]	  	[***]	  	[***]
	 Technical Verification
	  	[***]	  	[***]	  	[***]
	 Operational Verification
	  	[***]	  	[***]	  	[***]

 3.5.2.3 Test Discrepancies 

 The Contractor shall use his approved Product Assurance Plan processes to document, correct, and regression test system test
discrepancies. These discrepancies shall be corrected prior to the start of the next formal test or at a later time approved by TerreStar. 

3.5.2.4 Test Reports 

The Contractor shall prepare test reports documenting the results of the test activity, including procedures executed, procedure pass/fail
status, discrepancies discovered, and data collected. Discrepancies that cause system degradation or indicate a failure to meet performance specifications shall be discussed with system impact defined and correction plans indicated. 

 

	 	3.6	System Deliverables 

 The
Contractor shall deliver the hardware and software required to provide the full capability and service features for each Functionality Release as described in the S-BSS Functional Requirements. 

3.6.1 Satellite Base Station 

[***]. The S-BSS, including all its components, shall satisfy the functional and technical requirements specified in the S-BSS Functional
Requirements. 
 3.6.2 Spares 

The Contractor shall deliver sufficient initial spares, as defined in the Spares Provisioning Plan, to operate and maintain the S-BSS in
accordance with the S-BSS availability requirements set forth in the TSN_SAT_2_TRD-S-BSS Functional Requirements. 

3.6.3 S-BSS Test Bed 

The Contractor shall deliver and install at a TerreStar facility to be identified prior to shipment an S-BSS Test Bed comprised of a
minimal S-BSS configured with sufficient Base Station/channel equipment to fully exercise and test the satellite network, hardware and software upgrades, the air interface, and network configurations in a non-operational environment. The S-BSS Test
Bed shall interface [***]. 
  

			
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	 TerreStar Satellite Base Station Subsystem SOW

 
	  	 

  

 3.6.4 System Simulators and Test Tools 

The Contractor shall deliver to TerreStar and install as appropriate the S-BSS System Simulator(s) used in system development, integration
and test, and the technical and operational verification phases. 
 3.7
Deployment 
 The Contractor shall provide a System Deployment Plan to define how the S-BSS will be deployed for full revenue
service. This plan is described in further detail in the Documentation section. 
 The Contractor shall perform the planning and
engineering necessary to install the S-BSS in the two satellite gateway operational facilities at Ontario, Canada, and NLV, in accordance with TerreStar Engineering and Installation Guidelines (ref Section 2). Required facility modifications
will be presented at CDR with all supporting documentation. The Contractor shall provide all S-BSS engineering drawings and other specifications necessary for installation. TerreStar shall provide access to the facilities, as reasonably required by
the Contractor, necessary facility modifications, and any required local permits, licenses, etc. A physical audit will be conducted after installation and prior to Technical Verification to ensure all required equipment and documentation is
available. 
 [***] 

The Contractor shall be responsible for packing, shipment, unpacking, and installation of the S-BSS to the two satellite gateway sites at
NLV and Ontario, Canada and shall do sufficient integrity testing to ensure the S-BSS is ready for the Technical Verification Phase. 

3.8 Technical Verification 

The S-BSS Technical Specifications for each Functionality Release and all interfaces with the TerreStar Network Segments shall be verified
at each satellite gateway operational facility [***]. This verification shall begin after site installation is complete and a TRR is conducted. Tests shall include [***] shall include verification of critical and relevant technical parameters. If
the Contractor elects to perform portions of the TVTs without using the in orbit satellite, those test shall be specifically mentioned in the test plan and a strong justification provided. 

[***]. Test deficiencies shall be documented and resolution plans developed and implemented. 

[***] 
 [***]

 3.9 Operational Verification 

The readiness of the S-BSS Functionality Releases to enter operational service shall be verified during an Operational Verification Phase.
This phase shall begin after the Technical Verification Review and shall conclude with the completion of the operational demonstration/User Acceptance Test (UAT) for each Functionality Release. [***]. Each test shall be preceded by a TRR conducted
by TerreStar. 
 [***] 
  

			
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	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem SOW

 
	  	 

  

	 	3.10	First Call 

 The
Contractor shall use commercially reasonable efforts to assist TerreStar to establish a voice and data call using the satellite chipset and the S-BSS communicating through the satellite using the 2000 – 2020 MHz and 2180 – 2200 MHz bands
as soon as possible after access to the satellite in its orbital position is granted. The parameters of a voice and data call shall be defined by the end of CTS. 

3.11 Documentation 

The Contractor shall follow industry standard documentation and data management practices and procedures. Data Management shall encompass
developed data and data pertaining to COTS products. 
 For each Functionality Release, the Contractor shall provide COTS manuals
for all delivered COTS hardware and software and shall prepare CI and Subsystem Maintenance Procedures for all developed hardware and software. 

Documentation shall be delivered in a format compatible with the latest version of Microsoft Office Professional Edition 2003 or higher
and can be transferred electronically. Delivery shall be in accordance with the schedules defined below and shall allow a minimum of four weeks for TerreStar review prior to approval. TerreStar shall approve/disapprove all documentation within four
weeks of receipt of final copy. Information contained in each document shall be as proposed by the Contractor. The documents to be delivered for the Kick-Off Meeting shall be delivered for review at a mutually agreed date to allow TerreStar
sufficient preparation time for the meeting. 
 Figure 3-2 Contract Deliverable Schedule 

  

															
	 Deliverable
	  	 Proposal
	  	 Kick-Off
	  	 SRR
	  	 PDR
	  	CDR	  	CTS	  	Comments
	 Program Master Phasing Schedule
	  	Prelim	  	Final	  		  		  		  		  	
	 Project Mgmt Plan
	  	Prelim	  	Final	  		  		  		  		  	
	 Product Assurance Plan
	  	Prelim	  	Final	  		  		  		  		  	
	 System Engineering Design Plan
	  	Prelim	  	Final	  		  		  		  		  	
	 Software Development Plan
	  	Prelim	  	Final	  		  		  		  		  	
	 Hardware Development Plan
	  		  		  	Prelim	  	Final	  		  		  	
	 Data Management Plan
	  	Prelim	  	Final	  		  		  		  		  	
	 System Performance Specification
	  	Define Approach	  	Review Proposal	  	Prelim	  	Final	  		  		  	
	 Interface Control Document
	  	Define Approach	  	Review Proposal	  	Prelim	  	Final	  		  		  	

  

			
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	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem SOW

 
	  	 

  

															
	 Deliverable
	  	 Proposal
	  	 Kick-Off
	  	 SRR
	  	 PDR
	  	 CDR
	  	 CTS
	  	 Comments

	 CONOPS
	  	Define Approach	  	Review Proposal	  	Prelim	  	Final	  		  		  	
	 Air Interface Specification
	  	Define Approach	  	Review Proposal	  	Prelim	  	6/15/07	  		  		  	
	 System Integration and Test Plan
	  	Concept
provided by
TerreStar	  	Review Concept	  	Draft	  	Prelim	  	Final	  		  	
	 Analysis and Simulation Plan
	  		  	Prelim	  	Final	  		  		  		  	
	 Export Control Analysis
	  		  	Prelim	  		  	Final	  		  		  	
	 Hardware Requirements Document
	  		  		  	Prelim	  	Final	  		  		  	
	 Software Requirements Document
	  		  		  	Prelim	  	Final	  		  		  	
	 Specification Traceability Matrix
	  		  		  	Prelim	  	Final	  		  		  	
	 Hardware Design Specification
	  		  		  		  	Prelim	  	Final	  		  	
	 Software Design Specification
	  		  		  		  	Prelim	  	Final	  		  	
	 System Operator’s Manual
	  		  		  		  		  	Prelim	  	Final	  	
	 System Deployment Plan
	  		  		  		  	Prelim	  	Final	  		  	
	 Manufacturing QA Plan
	  		  		  		  	Prelim	  	Final	  		  	
	 Spares Provisioning Plan
	  		  		  		  	Prelim	  	Final	  		  	
	 Training Plan
	  		  		  		  	Prelim	  	Final	  		  	
	 System Test Procedures
	  		  		  		  		  	Prelim	  	Final	  	
	 CI and System Build Documentation
	  		  		  		  		  	Prelim	  	Final	  	
	 CI and System Maintenance Procedures
	  		  		  		  		  	Prelim	  	Final	  	
	 Test Reports
	  		  		  		  		  		  	Final	  	required for
TVT and OVT

  

			
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	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem SOW

 
	  	 

  

															
	 Deliverable
	  	Proposal	  	Kick-Off	  	SRR	  	PDR	  	CDR	  	CTS	  	Comments
	 Project Status Reports
	  		  		  		  		  		  		  	Due at each
PMR
	 Maintenance and Support Plan
	  		  	Prelim	  		  		  	Final	  		  	

 3.11.1 Documentation Descriptions 

3.11.1.1 Program Master Phasing Schedule 

The Program Master Phasing Schedule shall define the following: 

[***] 

3.11.1.2 Program Management Plan 

The PMP shall define the structure and management organization used to execute the program (ref. para 3.2.2). 

3.11.1.3 Product Assurance Plan 

A Product Assurance Plan shall be developed for Hardware Quality Assurance, Data Management and Configuration Management. The Software
Quality Assurance and Software Configuration Management processes shall be documented in the Software Development Plan according to normally accepted commercial practice. The Hardware Quality and Configuration Management processes shall use best
commercial practices or accepted standards as applicable for the type of hardware being developed. The Product Assurance Plan shall identify all standards used. 

3.11.1.4 System Engineering Design Plan 

The Contractor shall provide a System Engineering Design Plan that details the system engineering process to be used during the
development. A structured, top-down design process that ensures compliance to the SPS shall be used. At a minimum the process shall consider the following: requirements allocation, establishment and maintenance of design budgets; consideration of
TerreStar Network design and Satellite Segment design; analysis and simulation efforts; design oversight of the various system, hardware, and software design activities; design optimization; use of common methodologies, tools, procedures and
documentation: proactive coordination and resolution of issues with and among design groups; a coordinated test philosophy; and a responsive specification design process with TerreStar visibility and joint Contractor/TerreStar system specification
change approval. 
 3.11.1.5 Software Development Plan 

The Contractor shall provide a Software Development Plan in accordance with normally accepted commercial practice. The plan shall be
delivered in final at the Kick-Off Meeting. 
 3.11.1.6 Hardware Development Plan 

Contractor shall provide a Hardware Development Plan that defines the hardware development process to be used for the development of new
hardware, the integration of COTS, and the modification of COTS. The plan shall define required documentation, use of engineering notebooks, integration processes, discrepancy reporting, and discrepancy correction. 

 

			
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	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem SOW

 
	  	 

  

 3.11.1.7 Data Management Plan 

The Contractor shall implement a Data Management Plan to manage and control the generation, acquisition and maintenance of technical
documents, engineering data, vendor data, manuals, management data and operational support data. 
 3.11.1.8 Analysis and
Simulation Plan 
 The Contractor shall provide a plan which defines which requirements will be verified by analysis,
prototyping, simulation and/or modeling. 
 3.11.1.9 System Performance Specification 

The System Performance Specification shall define the functional performance, interface, logistical, and quality requirements of the S-BSS
and shall include a verification matrix to define how and when each requirement in the SPS will be verified (analysis, inspection, test, computer simulation; unit test, subsystem test, etc.). 

3.11.1.10 Interface Control Document 

The Contractor shall provide an ICD that describes both physically and functionally all internal and external system interfaces. It shall
be compatible with existing satellite segment, IP Network, OSS/BSS, and 3G Core/IMS ICDs. The IP Network and 3G Core/IMS ICDs will be provided by TerreStar as described in section 2. 

3.11.1.11 System Operations Concept 

The Contractor shall develop a System Operations Concept (CONOPS) that describes the operation of the S-BSS within the satellite segment
and its interfaces with the IP Network and User Equipment and allocates functional and performance requirements from the SPS to the operational procedures. The document shall be written in a format provided by the Contractor and should include: a
system description with functional diagrams, an operations description with data flow diagrams, operation time lines, Human/Machine Interface (HMI), etc. The contractor shall include in the CONOPS likely disaster scenarios with how the S-BSS would
allocate frequency and power to the channels and the likely capacity of the satellite segment in each scenario. 
 3.11.1.12
Common Air Interface Specification 
 The Contractor shall develop a Common Air Interface (CAI) Specification for [***]

 [***] 

3.11.1.13 Hardware Requirements Document 

The Contractor shall provide a Hardware Requirements Document that allocates functional and performance requirements from the SPS to the
system hardware. This document shall be used as the basis for the Hardware Design Specification. 
  

			
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	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem SOW

 
	  	 

  

 3.11.1.14 Software Requirements Document 

The Contractor shall provide a Software Requirements Document that allocates functional and performance requirements from the SPS to the
system software. This document shall be used as the basis for the Software Design Specification. 
 3.11.1.15 System
Integration and Test Plan 
 The Contractor shall provide a System Integration and Test Plan that reasonably conforms with
the Test Concept document previously provided to Contractor and that details the test philosophy and test process to be used to accomplish system integration and technical and operational verification. [***] 

Examples of tests that shall be included are: [***] 

The Test Plan shall define a problem reporting process that contains defined severity levels with Contractor response and resolution times
specified. 
 3.11.1.16 Specification Traceability Matrix 

The Contractor shall generate a matrix showing the flow down of the TerreStar system specifications into the S-BSS subsystem, CIs, and
units. 
 3.11.1.17 Hardware and Software Design Specifications 

The Contractor shall provide design specifications for each hardware and software configuration item. The specification shall be written
in a format provided by the Contractor and shall include: a configuration item definition, interface definitions, major components, characteristics, design and construction standards, physical and functional characteristic, test requirements, etc.

 3.11.1.18 System Operators Manual 

The Contractor shall provide complete documentation on the proper operation and features of the S-BSS suitable for the network operators.

 3.11.1.19 System Deployment Plan 

The System Deployment Plan (SDP) shall include the Contractor’s plan for S-BSS delivery and installation, facility requirements,
field service support after Consent-to-Ship, etc. The plan shall also include depot and field support for software and hardware maintenance, spares provisioning, O&M facility modifications, and TerreStar operator, customer service, engineering
and field service training. 
 3.11.1.20 Manufacturing QA Plan 

The Contractor shall provide an equipment manufacturing plan showing the inspections, procedures and other quality functions it will use
to assure that the deliverable hardware satisfies the program quality requirements. 
 3.11.1.21 Spare Provisioning Plan 

 The Contractor shall provide a plan for recommended spare parts inventory to be maintained by TerreStar to assure continued
reliable operations. 
  

			
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	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem SOW

 
	  	 

  

 3.11.1.22 Training Plan 

The Contractor shall develop a plan describing the procedures, materials, media and methodologies it will use to provide training to all
subsystem users and operators. Training methods may include, but are not limited to, computer assisted instruction, classroom presentation, supervised on-the-job training, and video tape presentations. 

3.11.1.23 System Test Procedures 

The Contractor shall develop System Test Procedures to test and validate system performance during the formal test activities. 

3.11.1.24 CI and Subsystem Build Documentation 

Engineering documentation shall be delivered for all TerreStar funded development. This documentation shall include: design
specifications, schematics, wiring diagrams, parts lists, process specifications, assembly instructions, test specifications, quality standards, licenses, or any other documentation needed to technically and legally operate the delivered subsystem.
Schematics, wiring diagrams, parts lists and as installed facility drawings shall be provided for each S-BSS location. For S/W developed or modified under this contract, the Contractor shall provide all licenses and documentation required for system
operation, including all source code, as described in the Contract. 
 3.11.1.25 CI and Subsystem Maintenance Procedures 

 CI and System Maintenance Procedures shall be provided for the S-BSS at each location. These documents shall include: field
service manuals, troubleshooting instructions and line replaceable unit (LRU) identification, operating procedures, emergency procedures, network management procedures, Upgrade procedures for Release 1.5 to Release 2, back-out procedures for Release
2 to revert to Release 1.5, should also be provided. 
 3.11.1.26 Test Reports 

The Contractor shall deliver a test report at the conclusion of each formal test activity. These reports are described in paragraph 3.5.2.

 3.11.1.27 Project Status Reports 

Project Status Reports shall be provided at each PMR as described in paragraph 3.2.3. 

3.11.1.28 Maintenance and Support Plan 

The Contractor shall develop a Maintenance and Support Plan which details the organization and activities necessary to provide operational
support for S-BSS throughout the Warranty period. 
 3.11.2 S-BSS Specification Tree 

Figure 3-3 Documentation Specification Tree shows the specification and manual relationships. 

Figure 3-3 Documentation Specification Tree 

[***] 
  

			
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	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem SOW

 
	  	 

  

 3.12 Training 

3.12.1 Training Plan 

The Contractor shall generate an S-BSS Operations and Maintenance Training Plan. The Contractor shall impart to TerreStar personnel the
skills necessary to operate and maintain the S-BSS in an effective and efficient manner and within subsystem performance specifications. 

3.12.2 Training Material 

The Contractor shall provide O&M training course materials including course description, curricula, class handouts, and training
course materials; provide trained and qualified instructors; and conduct the presentation of the training course. 

3.12.3 Training Courses 

The Contractor shall develop a training course that address safety, security, familiarization with S-BSS equipment, functionality, air
interface design, maintenance, installation, and operation. Course shall be developed for specific job areas to achieve proficiency levels consistent with assigned tasks, as well as skills for overall operation of the S-BSS. 

3.12.4 Training Methods 

Training methods may include, but are not limited to, computer assisted instruction, classroom presentation, supervised on-the-job
training, and video tape presentations. 
 3.12.5 Training Documents 

The Contractor shall prepare the following documents: Training Plan, Training Course Materials, Instructor’s Guide, Operations
Certification Procedures and Materials. 
 3.13 Customer Furnished Equipment 

Unless clearly stated in the body of the following, dates for deliverables are TBD; the Contractor and TerreStar shall agree dates at NLT
SRR. 
 The dates for some of the below items are shown in section 3.1.1. 

3.13.1 Site Facilities 

TerreStar shall be responsible for provisioning the two satellite gateway facilities including the building and associated infrastructure
as specified in the System Deployment Plan. 
 TerreStar shall provide the onsite office space, power, communications, storage,
etc for the site installation team. 
 TerreStar shall provide the Core Network, 3G Core/IMS Segment, and IT segment. 

TerreStar shall provide connectivity to the CALEA and E911 services. 

 

			
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	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem SOW

 
	  	 

  

 3.13.2 S-BSS Testing 

TerreStar shall facilitate the Test Plan coordination between the S-BSS and SBN contracts. 

[***] 
 The
maintenance windows shall be coordinated so as not interfere with SBSS testing, as much as possible. In the event they do interfere with SBSS testing, Contractor shall be granted relief from the associated Milestone completion due date and any
Liquidated Damages, if applicable. 
 During this time, Hughes requires that the GRM, SOC, Core, and UT to be available and
supported. 
 During this time, the SBSS is not expected to be operational. During the last 2 weeks of the TVT testing and
after the TVT Dry-Run on the Satellite is completed, Hughes shall support, on a second priority basis, TSN OVT. 
 TerreStar and
the Contractor agree that during the period of overlap between TVT and SBN IOT that reasonable effort will be used to ensure maximum availability of shared test resources to both test campaigns. 

TerreStar shall provide the User Equipment (UE) and the necessary UE technical support to be used during the Technical and Operational
Verification Phases. The UE must be available by [***]. 
 TerreStar shall provide numbering plans as required, IP address plans,
telephone numbering plans, or others not later than [***]. (This item was delivered.) 
 TerreStar shall provide the Core
Network, 3G Core/IMS Segment, and IT segment connectivity as required at the Contractor facility for use during development, test, integration and Consent-to-Ship Testing [***]. 

TerreStar shall provide a functional GRM/GRM simulator at Hughes Lab Facilities by [***], and the operational GRM in the field for field
testing by [***]. 
 TerreStar shall provide access to the SBAS and/or SBAS simulators/emulators for Contractor use during
development, test, integration, Consent-to-Ship Testing, and Technical and Operational Verification as defined in the System Integration and Test Plan and on a non interference basis with SBN activities. 

After S-BSS Acceptance, TerreStar will provide access to the TerreStar Development and Test environments for use during warranty repairs,
functionality improvements, integration and test activities, and other development requirements. TerreStar will provide test and development support as mutually agreed. 
  

			
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	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem SOW

 
	  	 

  

 4 Project Schedule 

4.1 General 

The S-BSS project shall be comprised of several functionality releases as described in section 3.1. The Functionality Release 1.0 and 1.1
phasing is portrayed below. Key dates are provided in section 3.1. Planning for Release 1 starts when a letter contract/MOU is issued and concludes 45 days later with a Kick-Off Meeting. As the Release 1 development progresses and subsystem
integration begins, the program enters the Release 1.1 Technical Verification Phase. This Phase concludes with the Release 1.1 TVT and Technical Verification Review and the Release 1.1 Operational Verification Phase begins. During this phase the
Contractor shall support an operational demonstration/UAT planned and executed by TerreStar. This phase concludes with S-BSS Provisional Acceptance after the successful completion of the operational demonstration/UAT and the Operational Readiness
Review. O&M Handover for Release 1.1 occurs at Provisional Acceptance, for Release 2 software functionality at Release 2 ORR and for the Canadian gateway at Final Acceptance. 

Figure 4-1 High Level S-BSS Project Schedule 

 

 

 Subsequent Functionality Releases shall follow the high level project phases shown in Figure 4-1 High Level
S-BSS Project Schedule. 
 4.2 Program Milestones 

Program milestones are: Kick-Off Meeting, System Requirements Review, Preliminary Design Review, Critical Design Review, Consent-to-Ship
Review, Technical Verification Review, and Operational Acceptance. These are defined below. 
  

			
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	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem SOW

 
	  	 

  

 4.2.1 Planning and Development 

Planning and development shall be conducted according to the Contractor’s PMP, System Engineering Design Plan, Hardware and Software
Development Plans, and the Product Assurance Plans. Suggested efforts are as follows and required milestones are defined. 

4.2.2 Kick-Off Meeting 

The Kick-Off Meeting purpose, scope and deliverables are defined in paragraph 3.2.3.1. 

4.2.3 System Requirements Review 

The SRR purpose, scope and deliverables are defined in paragraph 3.2.4.2. Each Functionality Release shall have an SRR. 

Figure 4-2 Technical Meetings 

 

 

 4.2.4 Preliminary Design Review 

The PDR purpose, scope and deliverables are defined in paragraph 3.2.4.3. Each Functionality Release shall have a PDR. The PDR for Release
2 may be combined with the SRR by mutual consent. 
 4.2.5 Critical Design Review 

The CDR purpose, scope and deliverables are defined in paragraph 3.2.4.4. Each Functionality Release shall have a CDR. 

 

			
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	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem SOW

 
	  	 

  

 4.2.6 Technical Verification 

Technical verification shall be conducted according to the Contractor’s PMP, the System Integration and Test Plan, and the Product
Assurance Plan. Suggested efforts are as follows and required milestones are defined. Each Functionality Release shall have a TVT. 

Figure 4-3 Integration and Test High Level Schedule 

 

 

 4.2.7 Consent to Ship Review 

4.2.7.1 CTS Purpose 

Verify the readiness to ship S-BSS to the operational site and the readiness of the operational sites to accept the S-BSS deliverables.

 4.2.7.2 CTS Scope 

Review CTS test results, operational facility preparations, and deployment preparations. Each Functionality Release and the Canadian
gateway hardware delivery shall have a CTS Review. 
 4.2.7.3 CTS Deliverables 

Satellite Base Station; initial spares; S-BSS test tools; lien work-off plan; CI and System Maintenance Procedures; System Test
Procedures; CI and System Build Documentation; Test Reports. 
 4.2.8 Technical Verification Review

 4.2.8.1 Technical Verification Review Purpose 

There shall be a Technical Verification Review (TVR) for each functionality release to determine: [***] 

 

			
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	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem SOW

 
	  	 

  

 4.2.8.2 Technical Verification Review Scope 

During the TVRs the Contractor shall present information on the readiness of the S-BSS including: a review of the TVT results to validate
proper technical performance; a complete report on all open problem reports that summarize the issue, the severity, the resolution plan, and when the problem resolution will be available for integration into the operational system; operations and
maintenance procedures; S-BSS spares availability; S-BSS stability and availability; and other technical and operational readiness issues. 

4.2.8.3 Technical Verification Review Deliverables 

Test Reports; technically verified S-BSS; problem report work-off plan. 

4.2.8.4 Technical Verification Review Success Criteria 

The data presented at the TVR will be assessed and a determination made on the readiness of the S-BSS to enter the Operational
Verification Phase. The following criteria shall be met. . 
 [***] 

At Completion of each TVR TerreStar will approve the TVT results or will notify the Contractor in writing of any non-conformances with
applicable specifications. Contractor will promptly correct such nonconformity and shall notify TerreStar that the corrections are ready for retest. Upon successful completion of such retest, TerreStar will give its approval. Upon non-successful
completion, this process shall repeat. In the event TerreStar fails to provide such written notice within ten (10) days after completion of the TVR, TerreStar will be deemed to have given its approval of TVR. 

4.3 Operational Verification 

Operational verification shall be conducted according to the Contractor’s PMP, TerreStar System Integration and Test Plan, S-BSS
Integration and Test Plan, the Product Assurance Plan, and the jointly developed operational procedures. Suggested efforts are as follows and required milestones are defined. Each Functionality Release shall have an Operational Verification Test and
the Canadian gateway S-BSS shall have an OVT regression test. 
  

			
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	  	AMENDMENT 4
	 TerreStar Satellite Base Station Subsystem SOW

 
	  	 

  

 Figure 4-4 Operational Verification High Level Schedule

 

 

 4.3.1 Operational Readiness Review (ORR) 

4.3.1.1 Operational Readiness Review Purpose 

There shall be an Operational Readiness Review (ORR) for Functionality Release 1.1, the Canadian Gateway, and Functionality Release 2 to
determine: if the required functionality and capacity for the release is operating in accordance with the design and requirements and therefore is ready for revenue generating service. 

4.3.1.2 Operational Readiness Review Scope 

Review Operational Verification Test results for trouble reports, system stability, operational procedure quality, personnel training, and
other pertinent requirements. 
 During the ORRs the Contractor shall present information on the readiness of the S-BSS
including: a review of the S-BSS technical performance during the OVT to validate proper technical performance; a complete report on all open problem reports that summarize the issue, the severity, the resolution plan, and when the problem will be
available for integration into the operational system; operations and maintenance procedures; S-BSS spares availability; S-BSS stability and availability; and other technical and operational readiness issues. 

4.3.1.3 Operational Readiness Review Deliverables 

Operational procedures and trained personnel. Problem report work-off plan. 

4.3.1.4 Operational Readiness Review Success Criteria 

The data presented at the ORR will be assessed and a determination made on the readiness of the S-BSS to enter Revenue Service. The
following criteria shall be met. 
  

			
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 [***] 

An assessment that the S-BSS is ready for Revenue Service based on the criteria above must be made to successfully complete the OVT and
ORR and for Provisional Acceptance, Release 2 Acceptance, and Final Acceptance to occur. At Completion of each ORR TerreStar will approve the ORR or will notify the Contractor in writing of any non-conformances with applicable specifications. Where
such non-conformance is attributable to Contractor, Contractor shall promptly correct such non-conformity and shall notify TerreStar that the corrections are ready for retest. Upon successful completion of such retest, TerreStar will give its
approval. Upon non-successful completion, this process shall repeat. With respect to each ORR, in the event (i) TerreStar fails to provide such written notice within ten (10) days after completion of the ORR, or (ii) TerreStar fails
to complete the ORR within the time schedule set forth in this Contract, or as amended, and such delay is not attributable to Contractor, or (iii) TerreStar puts the S-BSS, or portions thereof, in each case covered by such ORR, delivered by
Contractor into revenue generating service, TerreStar will be deemed to have given its approval of the relevant ORR. 
 
4.4 Operational Capability 
 4.4.1 Initial Operational Capability 

The Release 1.1 ORR shall be held prior to the start of Initial Operational Capability (ref. paragraph 3.1). 

4.4.2 Release 2 Operational Acceptance 

The Release 2 ORR shall be held prior to establishing operational capability for the Release 2 Functionality. Release 2 Functionality
Operational Acceptance shall occur after the successful completion of the Release 2 Functionality ORR at NLV. 

4.4.3 Full Operational Capability 

The S-BSS FOC ORR shall be held prior to the start of Final Acceptance (ref. paragraph 3.1). The S-BSS FOC ORR shall include a summary of
the results from the Canadian Gateway Release 2 ORR and the NLV Release 1.1 and Release 2 ORRs. S-BSS Final Acceptance shall occur after the S-BSS FOC ORR and shall be no later than [***]. 

 

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 Exhibit A-2 

TerreStar Satellite Chipset 

Statement of Work 

TSN_SAT_2_REQ-Satellite Chipset SOW V 2.4 

June 25, 2009 

Hughes Network Systems, LLC 
 11717
Exploration Lane 
 Germantown, Maryland 20876 
  

			
		  	  

	 TerreStar Networks Inc.

One Discovery Place

12010 Sunset Hills Road, 6th Floor

Reston, Virginia 20190
	  	  

		  	 Vincent Loiacono, Chief Accounting Officer

 

	
	
This document contains data and information proprietary to TerreStar Networks Inc. and Hughes Network Systems, LLC. This data is being furnished
pursuant to the provisions of the Contract between TerreStar Networks Inc. and Hughes Network Systems, LLC for the TerreStar Satellite Base Station Subsystem. Hughes Network Systems, LLC and TerreStar Networks Inc. shall have the right to duplicate,
use or disclose the data and information to the extent specified in the Contract and herein.
  

	Information included in this Exhibit may contain technical data controlled by the Export
Administration Regulations (“EAR”) and/or the International Traffic in Arms Regulations (“ITAR”). This document has not been cleared for export or transfer to a Foreign Person or foreign entity.

 

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 REVISION HISTORY 

 

							
	 Date
	  	Version	  	 Description
	  	Author
	4/6/2007	  	0.1	  	Initial Draft	  	[***]
	4/9/2007	  	0.2	  	Draft	  	[***]
	4/11/2007	  	0.3	  	Preliminary	  	[***]
	4/16/2007	  	0.5	  	Various Negotiation Updates. Made Consistent with S-BSS SOW	  	[***]
	4/23/2007	  	1.0	  	Initial Release with Contract	  	[***]
	4/26/2007	  	1.2	  	Final Release Version with Contract	  	[***]
	5/13/2008	  	2.0	  	Schedule extension	  	[***]
	10/20/2008	  	2.1	  	Amendment 3 Final Version	  	[***]
	10/22/2008	  	2.2	  	Final Edits	  	[***]
	02/20/09	  	2.3	  	Amendment 3 edits to conform to new program plan	  	[***]
	06/25/09	  	2.4	  	Amendment 4 edits including Change Notice 8 Realignment, Satellite Delay, Oberon Integration Platform, and Python Workaround	  	[***]

  

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 TABLE OF CONTENTS 

 

			
	 Section
	  	Page
		
	 1.0     INTRODUCTION
	  	1
	 1.1     PURPOSE AND OBJECTIVE
	  	1
	 1.2     SCOPE
	  	1
		
	 2.0     APPLICABLE SPECIFICATIONS
	  	1
		
	 3.0     REQUIREMENTS
	  	1
	 3.1     GENERAL REQUIREMENTS
	  	1
	 3.1.1     Chipset Development
	  	1
	 3.2     PROGRAM MANAGEMENT
	  	2
	 3.2.1     Program Management Organization
	  	2
	 3.2.1.1     Program Manager
	  	2
	 3.2.1.2     Subcontracts
	  	2
	 3.2.1.3     Program Communications
	  	2
	 3.2.2     Program Plans
	  	2
	 3.2.2.1     Program Management Plan
	  	2
	 3.2.2.2     Program Schedule
	  	2
	 3.2.3     Program Management Reviews, Meetings, and Status Reports
	  	3
	 3.2.3.1     Kick-Off Meeting
	  	3
	 3.2.3.2     Program Status
	  	3
	 3.2.3.3     Monthly Program Management Reviews
	  	3
	 3.2.3.4     Additional Management Reviews
	  	3
	 3.2.4     Technical Reviews, Meetings, and Reports
	  	3
	 3.2.4.1     General
	  	3
	 3.2.4.2     C-SRR
	  	4
	 3.2.4.3     C-PDR
	  	4
	 3.2.4.4     C-CDR
	  	4
	 3.2.4.5     Meeting Minutes
	  	4
	 3.2.4.6     Additional Meetings
	  	4
	 3.2.4.7     Readiness Reviews
	  	5
	 3.3     DESIGN AND DEVELOPMENT
	  	5
	 3.3.1     UMTS Compatibility
	  	5
	 3.3.2     Export Compliance
	  	5
	 3.3.3     System Engineering
	  	5
	 3.3.3.1     System Design
	  	5
	 3.3.3.2     Common Air Interface Specification
	  	6
	 3.3.3.3     Interface Control Document
	  	6
	 3.3.3.4     Analysis and Simulation
	  	6
	 3.3.3.5     Control and Management
	  	6
	 3.3.4     Software Design and Development
	  	6
	 3.3.4.1     Software Development Plan
	  	6

  

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

			
	 3.3.4.2     Contractor Developed Software
	  	6
	 3.3.4.3     Software Development
	  	6
	 3.3.4.4     Software Design Documentation
	  	6
	 3.3.4.5     Software Test
	  	6
	 3.3.5     Hardware Design and Test
	  	6
	 3.3.5.1     Hardware Development Plan
	  	6
	 3.3.5.2     Contractor Developed Hardware
	  	7
	 3.3.5.3     Phase 1 Hardware
	  	7
	 3.3.5.4     Phase 2 Hardware
	  	8
	 3.3.5.5     Hardware Test
	  	8
	 3.4     PRODUCTION AND IMPLEMENTATION
	  	8
	 3.4.1     Production Process, Quality Assurance, and Configuration Management
	  	8
	 3.4.2     COTS
	  	9
	 3.4.2.1     COTS Procurement
	  	9
	 3.4.2.2     COTS Performance Verification
	  	9
	 3.4.2.3     COTS Post Installation Testing
	  	9
	 3.5     TECHNICAL AND OPERATIONAL VERIFICATION PHASES
	  	9
	 3.5.1     General
	  	9
	 3.5.2     Test Objectives
	  	10
	 3.5.3     Design Verification
	  	10
	 3.5.4     Device Qualification Test
	  	10
	 3.5.5     Phase 2 Lab Integration Test
	  	10
	 3.5.6     UE Integration
	  	11
	 3.5.7     Integration with Additional terminals
	  	11
	 3.5.8     Test Discrepancies
	  	11
	 3.5.9     Test Reports
	  	11
	 3.5.10     Technical Verification (reference S-BSS SOW Section 4.2.8)
	  	12
	 3.5.10.1     Technical Verification Review Purpose
	  	12
	 3.5.10.2     Technical Verification Review Scope
	  	12
	 3.5.10.3     Technical Verification Review Deliverables
	  	12
	 3.5.10.4     Technical Verification Review Success Criteria
	  	12
	 3.5.11     Operational Verification (reference S-BSS SOW Section 3.5, 3.9, and
4.3)
	  	12
	 3.5.11.1     Operational Readiness Review (ORR)
	  	12
	 3.5.11.2     Operational Readiness Review Purpose
	  	12
	 3.5.11.3     Operational Readiness Review Scope
	  	13
	 3.5.11.4     Operational Readiness Review Deliverables
	  	13
	 3.5.11.5     Operational Readiness Review Success Criteria
	  	13
	 3.6     COMPONENT DELIVERABLES
	  	13
	 3.6.1     Phase 1 — Discrete Reference Design
	  	14
	 3.6.2     Phase 2 ASIC Platform
	  	14
	 3.7     DOCUMENTATION
	  	14
	 3.7.1     Documentation Descriptions
	  	15
	 3.7.1.1     Program Master Phasing Schedule
	  	15
	 3.7.1.2     Program Management Plan
	  	16
	 3.7.1.3     Product Assurance Plan
	  	16

  

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

			
	 3.7.1.4     System Engineering Design Plan
	  	16
	 3.7.1.5     Software Development Plan
	  	16
	 3.7.1.6     Hardware Development Plan
	  	16
	 3.7.1.7     Data Management Plan
	  	16
	 3.7.1.8     System Performance Specification
	  	16
	 3.7.1.9     Interface Control Document
	  	16
	 3.7.1.10     Hardware Requirements Document
	  	17
	 3.7.1.11     Software Requirements Document
	  	17
	 3.7.1.12     Integration and Test Plan
	  	17
	 3.7.1.13     Specification Traceability Matrix
	  	17
	 3.7.1.14     Hardware and Software Design Specifications
	  	17
	 3.7.1.15     Manufacturing QA Plan
	  	17
	 3.7.1.16     System Test Procedures
	  	17
	 3.7.1.17     Test Reports
	  	17
	 3.7.1.18     Project Status Reports
	  	18
	 3.7.1.19     Support Plan
	  	18
	 3.7.1.20     ASIC Data Sheet
	  	18
	 3.7.1.21     ASIC Procurement Specification
	  	18
	 3.8     CHIPSET PRICE ESTIMATES
	  	18
	 3.9     CUSTOMER FURNISHED ITEMS
	  	18
	 3.9.1     User Terminal Chipset, Vocoder, and Support
	  	18
	 3.9.2     User Terminals using Phase 1 and Phase 2 Satellite Baseband Hardware
	  	20
	 3.9.3     CFE Design Materials Deliverables
	  	20
	 3.9.3.1     Phase 1
	  	21
	 3.9.3.2     Phase 2
	  	21
	 3.10     Development FLOW
	  	22
	 3.10.1     Phase 1 Development
	  	22
	 3.10.2     Phase 2 Development
	  	23
	 3.11     OBERON INTEGRATION BOARD DESCRIPTION
	  	23
		
	 4.0     PROJECT SCHEDULE
	  	1
	 4.1     FULL REVENUE SERVICE
	  	4

  

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 LIST OF FIGURES 

 

			
	 Figure
	  	Page
		
	 Figure 3-1     Chipset Test Objectives
	  	10
	 Figure 3-2     Phase 2 Development
	  	23

  

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 LIST OF TABLES 

 

			
	 Table
	  	Page
		
	 Table 3-1.     Contract Deliverable Schedule
	  	15
	 Table 3-2.     User Terminal Chipset, Vocoder and Support
	  	18
	 Table 3-3.     User Terminals using Phase 1 and Phase 2 Satellite Baseband
Hardware
	  	20
	 Table 3-4.     CFE Design Materials Deliverables — Phase 1
	  	21
	 Table -3-5.     CFE Design Materials Deliverables — Phase 2
	  	21
	 Table 4-1.     Satellite Chipset Master Project Milestones
	  	1

  

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 1.0 INTRODUCTION 

 
  

1.1 PURPOSE AND OBJECTIVE 
 This
statement of work (SOW) is written as an amendment to the Satellite Base Station Subsystem (S-BSS) Contract. It adds the tasks necessary to complete one of the final critical components of the operational TerreStar Network (TSN), user equipment (UE)
comparable in size to today’s terrestrial cellular systems for communication over the TSN. 
 The Contractor shall supply the GMR-3G
Satellite Chipset (the “Chipset”) Platform (Satellite Baseband hardware and the SW Platform) and the Oberon Integration Board to TerreStar. 

For the Phase 1 Chipset, the Contractor shall support the TerreStar chosen terminal Vendor who will integrate, manufacture, and supply TerreStar
reference terminals based on the technology from Contractor. In addition, the Contractor shall perform all tasks necessary to support the integration, test, troubleshooting, and resolution of all problems associated with the Chipset from start of
integration with the terminal supplier through handset certification and from the start of integration with the S-BSS through Provisional and Final Acceptance. 

For Phase 2 Chipset, the Contractor shall develop the Oberon Integration Platform and shall integrate the Phase-2 Chipset, with the Oberon Integration
Platform, based on the Elektrobit Phase-1 Macroboard. The Contractor shall perform all tasks necessary to support integration of the Oberon Integration Platform with the S-BSS in a lab setting, through the Chipset Final Acceptance. 

The purpose of the Oberon Integration Platform is to reduce the requirement for CFEs from TerreStar for the Phase 2 Chipset Work. 

Through the Chipset Final Acceptance, support to TerreStar for the RF Chip selected by TerreStar (Freescale Python), shall be provided by Contractor via
a support agreement to be entered into between the Contractor and Freescale. 
 To eliminate any doubt about this Chipset Amendment,
TerreStar’s intent with this SOW is that the Contractor deliver satellite chipsets fully integrated with the S-BSS that are capable of the required functionality from both the S-BSS and the Chipset specifications as defined in this contract, as
amended, when operating from a terminal vendor supplied UE with Phase 1 Chipsets, and in a lab setting, with the Phase-2 Chipset on the Oberon Integration Platform. For purposes of clarity, it is understood that Contractor’s support for a
terminal vendor for the Phase 2 ASIC is not included in the scope of the Chipset Work under this SOW. Any such work, if requested by TerreStar, shall be provided by the Contractor under a separate agreement to be mutually agreed between the Parties.

  
  

1.2 SCOPE 
 The contractor shall be
responsible for the design and development of the Chipset within the timeframe defined in the milestone schedule. The schedule is based on a phased approach defined as Phase 1 and Phase 2. Phase 1 minimizes hardware design and development to deliver
an interim solution designed to provide market ready handsets to meet the stringent start of revenue service milestones of TerreStar. Phase 1 also includes several SW releases to build functionality. Two market releases shall be certified

  

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 
and available for revenue service with the S-BSS functionality as modified through O3M and P6M at Provisional and Final Acceptance. Phase 2 focuses on a custom ASIC hardware solution intended to
be a mid term solution on a technology roadmap that leads to a universal chipset. Phase 2 SW shall include the full functionality in the S-BSS and Chipset specifications as modified through O3M, C-PDR, and P6M. In general the scope of the
development is as follows: 
 The Contractor: 
  

	 	•	 	 Integrated Program Management between the S-BSS and the Chipset 

 

	 	•	 	 Systems engineering and evaluation of terminal chipsets 

 

	 	•	 	 Implement the S-BSS developed Common Air Interface and design the necessary SW modules for the Satellite mode protocol in the UE

  

	 	•	 	 Satellite mode baseband chip design (two phases as defined above) 

 

	 	•	 	 Evaluation of terrestrial RF chipset 

  

	 	•	 	 Development of software for satellite mode layers access stratum and below 

 

	 	•	 	 Integration of satellite mode 

  

	 	•	 	 Support for integration of satellite mode with terrestrial mode 

 

	 	•	 	 Phase 1 Prototype Design, Development, Integration, and Test 

 

	 	•	 	 Phase 2 Oberon ASIC Prototype Design and Development, Integration and Test with the Oberon Integration Board. 

 

	 	•	 	 Documentation 

  

	 	•	 	 Management of ASIC foundry manufacturing, release to production, and ongoing production 

TerreStar: 
  

	 	•	 	 Overall Terminal design 

  

	 	•	 	 Selection/supply of baseband terrestrial chipset (ATC baseband) 

 

	 	•	 	 Selection/supply of RF chipset 

  

	 	•	 	 Processor and software for terminal, including: non-access stratum; ATC access stratum; applications including voice codecs and other required terminal
features and functions (layers access stratum and below) 

  

	 	•	 	 Staged supply of prototype User Equipment to the Contractor for integration purposes. 

 

	 	•	 	 Access to satellite payload links as agreed in the S-BSS SOW. 

 

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 2.0 APPLICABLE SPECIFICATIONS 

The Chipset development shall conform to the requirements in the following specifications: 

 

	 	•	 	 Exhibit B, TSN_SAT_2_TRD-S-BSS Functional Requirements 

 

	 	•	 	 Exhibit B2, TSN_SUB_2_TRD-Satellite Chipset Functional Requirements 

 

	 	•	 	 Elektrobit Document, TerreStar Product Certification List, dated April 10, 2007 

 

	 	•	 	 TSN User Web Interface Specification (to be provided NLT C-PDR) 

The following documents are included as reference documents to ensure all components of the satellite segment are designed in a consistent manner where
applicable. 
 [***] 
  

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 3.0 REQUIREMENTS 

 
  

3.1 GENERAL REQUIREMENTS 

3.1.1 Chipset Development 
 The
Contractor shall perform all tasks necessary to design, prototype, develop, implement, test, support integration of the Chipset with the terminal vendor and the S-BSS, and release a Chipset which meets the requirements set forth in this SOW, the
Chipset Technical Specification, and the certification requirements that relate to the satellite portion of the UE. 
 The Chipset development
is in two phases as described in Section 1.2 . In Phase 1, the Chipset shall be developed using commercial-off-the-shelf components to minimize development effort and to reduce risk in meeting TSN operational requirements. Features are
required to be compatible with and provide the full S-BSS Release 1 functionality. Upgrades shall be developed to be compatible with and provide the full S-BSS Release 2 functionality certified and ready for revenue service at S-BSS Final
Acceptance. In Phase 2, the Chipset is integrated in a custom ASIC that supports the full S-BSS and CAI functionality as defined in the TerreStar Network requirements specified in Exhibit B and B2 of this Contract as modified with the O3M, C-PDR,
and P6M functionality. 
 The major releases and the functionality of the Chipset in Phase 1 and Phase 2 are provided in the following table.
Note that S-BSS Release 1 Alpha was deleted with CCN 6 to the S-BSS Contract. Release 1 Alpha remains a deliverable software release for the Chipset. The major program milestones are contained in Section 4.0 . 

 

							
	 S-BSS Release

 
 Baseband
Chipset
	  	 	  	 S-BSS Release 1
	  	 S-BSS Release 2

	 Phase 1

DSP, Discrete
	  	Chipset Release 1 Alpha Functionality	  	Full S-BSS Release 1 Functionality	  	[***]
				
	 Phase 2

ASIC
	  	N/A	  	N/A	  	Full S-BSS Release 2 Functionality and Full Chipset Phase 2 Functionality

For Phase 2, over the air testing is not included in the scope of the Chipset Work under this SOW, and all tests shall be run in a lab environment on the
Oberon Integration Board with the Macro Board and SBSS and required simulators. 
  

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

  

3.2 PROGRAM MANAGEMENT 

3.2.1 Program Management Organization 

3.2.1.1 Program Manager 
 The S-BSS
dedicated program manager shall assume responsibilities for accomplishment of all the tasks defined in this SOW. This shall include planning, directing, controlling, and reporting progress on all program activities from contract award through Phase
2 UE Certification. 
 There will be a single Executive Engineering Manager overseeing the chipset and S-BSS activities. 

3.2.1.2 Subcontracts 
 If the
Contractor elects to subcontract portions of the contract, the Contractor shall provide technical and administrative subcontract management sufficient to ensure successful performance of all subcontracts. Successful performance is delivery of the
required products on time, with full compliance to the technical specifications. Procurement specifications shall be generated for all subcontracts to assure compliance with the standards and requirements of this contract. The Contractor shall
ensure that maintenance and support is provided, either by his own or subcontractor personnel, through successful completion of UE certification for both Phase 1 and Phase 2 and through the warranty period. 

3.2.1.3 Program Communications 
 The
Program Manager shall be the principal interface between the Program and the Contractor’s corporate organization, the Contractor and Subcontractors (if applicable), and between the Contractor and the TerreStar Program Office for all matters
relating to the contract. The Program Manager shall also serve as the focal point for the identification and resolution of all problems. 

3.2.2 Program Plans 

3.2.2.1 Program Management Plan 
 The
Contractor shall update the S-BSS Program Management Plan (PMP) to include the Chipset Program activities. The update, at a minimum, shall describe the organizational structure changes and any changes to contractual and technical lines of
communication; update program responsibilities; update the management objectives and priorities and any risk areas; update the risk management process, if required; update personnel and staffing profiles and any plans for using subcontractors;
update all program interfaces, including any subcontractor interfaces; update the documentation control and configuration management processes, if required; and update the quality assurance processes, if required. 

The PMP updates shall be submitted at the Chipset Amendment Kick-Off Meeting. The Program Manager shall manage the Chipset program in accordance with the
approved PMP. 
 3.2.2.2 Program Schedule 

The Contractor shall update the Master Schedule with Chipset tasks/milestones and shall develop and maintain Detailed Chipset Program Schedules. The
Master Schedule shall clearly identify all key milestones including all hardware, software, and data deliveries, all TerreStar-furnished items and the date required, all deliveries to the terminal vendor and the date required, and major technical
and programmatic reviews. The Detailed Program Schedules shall be used by the contractor to plan all tasks, 
  

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 
task dependencies, and critical path. The Detailed Program Schedules shall be updated monthly to reflect program progress and provided to the TerreStar PMO with the monthly status report.

 The Contractor may maintain a separate Master Schedule for the Chipset development, however, the program interdependencies between the S-BSS
development and the Chipset development shall be contained in each schedule. 
 3.2.3 Program Management Reviews, Meetings, and Status
Reports 
 3.2.3.1 Kick-Off Meeting 

The Contractor shall conduct a Program Kick-Off Meeting as scheduled in Section 4.0 after contract amendment go ahead to ensure a mutual
understanding on all contractual requirements incorporated into the negotiated contract and the Contractor’s Program Plan. The meeting shall review the total program including contractual, technical, schedule, business conduct, and risk and
mitigation plans and how the Chipset development is coordinated and synchronized with the S-BSS development. Business conduct subjects would include topics such as: lines of authority and communication, meeting formats, TerreStar/Contractor
Responsibilities, scope change process, etc. The Contractor shall present a preliminary cost of the Phase 1 and Phase 2 production Chipset. If the preliminary cost is greater than the target cost contained in the contract, the Contractor shall
review all cost elements that are the basis of the cost estimate and propose potential cost reduction opportunities. The Contractor shall deliver a Kick-Off Meeting data package one week prior to the meeting that includes all the draft, preliminary,
and final documents listed in Table 3-1. 
 3.2.3.2 Program Status 

The Contractor shall provide TerreStar full visibility into all Chipset contractual efforts through both formal and informal communications. The formal
communications shall be in the form of monthly program reviews, ad hoc meetings to discuss contractual issues, and monthly written reports. The PMP shall specify which metrics will be used to certify milestone completion. When reasonable, S-BSS and
Chipset formal meetings shall be combined. 
 3.2.3.3 Monthly Program Management Reviews 

The Contractor shall conduct Monthly Program Management Reviews (PMR) in conjunction with the S-BSS PMR. Content of the PMR shall be as described in the
S-BSS SOW Section 3.2.3.3. 
 3.2.3.4 Additional Management Reviews 

Additional program management meetings shall be scheduled as required to insure TerreStar is fully apprised of status and risk issues that might impact
Chipset functionality or delivery date. 
 3.2.4 Technical Reviews, Meetings, and Reports 

3.2.4.1 General 
 The Contractor
shall conduct formal reviews to provide TerreStar an assessment of system performance. These reviews shall include a System Requirements Review (C-SRR), a Preliminary Design Review (C-PDR), a Critical Design Review (C-CDR) for each phase, and a
Chipset Design Verification Test Review for each phase. 
  

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 3.2.4.2 C-SRR 

The Contractor shall conduct the C-SRR at a mutually agreed time to select and present the design concept, to review preliminary trade study results,
prototype status, the program schedule, and risk reduction efforts. The Contractor shall deliver a C-SRR Data Package one week prior to the meeting that includes all the draft, preliminary, and final documents listed in Table 3-1. 

3.2.4.3 C-PDR 
 The Contractor shall
conduct a C-PDR at a mutually agreed time. The Contractor shall: review the preliminary design, the air interface, and link budgets; demonstrate achievability of critical designs; present the final Chipset requirements, the final prototyping results
of all critical units, the program master schedule, the risk assessment and the risk mitigation plans. The Contractor shall present the final cost of the Phase 1 and Phase 2 production Chipset as mutually agreed. The Contractor shall deliver a C-PDR
data package two weeks prior to the meeting that includes all the draft, preliminary, and final documents listed in Table 3-1. 

3.2.4.4 C-CDR 
 The Contractor shall
conduct C-CDRs (Phase 1 and Phase 2) at a mutually agreed time. The Contractor shall present data that verifies the final design meets the Chipset Performance Specification, including link budgets, the results of all remaining trade studies, the
C-PDR risk mitigation results, the program master schedule, and the Chipset test and qualification plan. The Contractor shall deliver C-CDR data packages two weeks prior to the meeting that includes all the draft, preliminary, and final documents
listed in Table 3-1. 
 3.2.4.5 Certification Go/No Go Review 

The Contractor shall support a UE Certification Go/No go Review held by the Terminal Vendor. The Contractor shall present the results of the Chipset
integration and test activities with the Terminal Vendor and the S-BSS including a functionality mapping of Chipset and S-BSS, all open problem reports with a closure plan, certification support activities and expected certification results. The
Contractor shall provide a Go/No Go recommendation for proceeding to UE certification. 
 3.2.4.5 Meeting Minutes 

The Contractor shall provide reports and/or minutes for each of the technical reviews including a listing of action items with specific closure dates for
each item. All engineering assumptions and agreements made or reached during the technical meetings shall be documented in the minutes. 

3.2.4.6 Additional Meetings 
 The
Contractor or TerreStar may schedule additional meetings to provide a technical interchange on topics requiring a greater level of detail or involvement of technical specialists. An agenda for each technical interchange meeting (TIM) shall be
generated and copies distributed to all participants one week prior to the TIM. The Contractor shall prepare minutes of each TIM, including the assigned action item list, and deliver a copy to TerreStar within one week after the TIM. 

 

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 3.2.4.7 Readiness Reviews 

The Contractor shall conduct Test Readiness Reviews prior to formal tests defined in Section 3.5 of this SOW. 

 
  

3.3 DESIGN AND DEVELOPMENT 
 The
Contractor shall perform the system engineering, software design and development, hardware design and development, and prototyping efforts necessary to ensure that the Chipset satisfies all of the functional and performance requirements set forth in
the Chipset Procurement Specification and that the Chipset as designed will be fully operational with the S-BSS. 
 3.3.1 UMTS
Compatibility 
 The Contractor shall provide a roadmap for Chipset upgrade from Release 6 to UMTS Release 7 in conjunction with the S-BSS
roadmap as described in the S-BSS SOW Section 3.3.1. 
 3.3.2 Export Compliance 

In conjunction with the S-BSS export compliance analysis (ref S-BSS SOW Section 3.3.2), the Contractor shall perform an analysis of the Chipset
components and shall determine the applicable export compliance regulations (e.g. International Traffic in Arms Regulations (ITAR) or Export Authorization Regulations (EAR). A preliminary assessment shall be made by the Kick-Off Meeting. Final
rulings from the appropriate export control authorities shall be received NLT C-PDR. 
 3.3.3 System Engineering 

The Contractor shall establish a system engineering office within the Chipset program organization and shall maintain this office throughout the duration
of the program. This office shall implement and maintain the System Design Plan approved at the Kick-Off Meeting, and shall ensure that all design activities are conducted in accordance with the provisions of the plan. 

The system engineering office shall have the overall responsibility of ensuring that the Chipset is in full compliance with the functional and
performance requirements and that it is fully operational with the S-BSS. The Contractor’s system engineering office shall perform the following specific tasks and others as necessary. 

3.3.3.1 System Design 
 The
Contractor shall develop, in accordance with the design plan and the Chipset Functional specification, a Chipset concept and top level subsystem design and shall document that design in the System Performance Specification (SPS). The system design
functions shall be allocated to hardware, software, and procedures, and documented in the Hardware Requirements Document and the Software Requirements Document. User Interface concepts shall be fully documented and coordinated with the Terminal
Vendor and TerreStar. 
 The Contractor shall ensure that the satellite chipset platform interfaces with the selected RF Chipset platform and
other handset components to meet the TerreStar link budget requirements. 
  

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 3.3.3.2 Common Air Interface Specification 

The Contractor shall ensure the Chipset design supports the GMR-3G CAI developed under the S-BSS SOW (ref BSS SOW Section 3.3.3.2). 

3.3.3.3 Interface Control Document 

The Contractor shall develop an ICD that defines external and internal interfaces and is compatible with the terminal vendor interfaces. 

3.3.3.4 Analysis and Simulation 

The Contractor shall perform analysis, simulation and modeling necessary to ensure that the Chipset meets the performance requirements. The results of
these studies shall be presented at C-PDR. The Analysis and Simulation Plan shall be presented and agreed to at C-SRR. 

3.3.3.5 Control and Management 
 The
Contractor shall ensure the Chipset is compatible with the TerreStar Subscriber Web Interface and that the satellite component of the UE can accept user configuration parameters from that interface. Design to be agreed at C-PDR. 

3.3.4 Software Design and Development 

3.3.4.1 Software Development Plan 

The Contractor shall provide a Software Development Plan (SDP) in accordance with paragraph 3.7.1.5 of this SOW. The S/W development shall be
managed in accordance with the SDP through delivery of both Phase 1 and 2. The Contractor shall support the integration and testing of the satellite Phase 1 chipset into the UE and the S-BSS. 

3.3.4.2 Contractor Developed Software 

The Contractor shall design, code, integrate, test, deliver, and repair all the software required for Chipset operation and maintenance, including,
over-the-air software installation in accordance with the Chipset specification to update the UE for full S-BSS Release 2 Functionality. The Contractor shall specify the software language to be used. 

3.3.4.3 Software Development 
 Where
Contractor-developed software or Contractor-modified commercially available, off-the-shelf software is used as part of the design, the S/W shall be developed or modified in accordance with the Contractor’s approved SDP. The Contractor shall
provide all licenses and documentation required for system operation. S/W developed or modified under this contract, including all related documentation and source code, shall be delivered as described in the Contract. 

3.3.4.4 Software Design Documentation 

The Contractor shall document functional software requirements in the Software Design Specification, validating the traceability of the requirements from
the System Performance Specification. The Software Design Specification detail shall be sufficient to ensure a common understanding of the requirements; ensure that requirements are complete, consistent, and testable; and define the inputs and
outputs for 
  

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 every function. The software shall be designed, selected, or developed to facilitate life-cycle
maintenance and over-the-air UE modification and updating in accordance with the specification. 
 3.3.4.5 Software Test 

The Contractor shall generate and use test plans, procedures, and reports to verify that each software configuration item (SWCI) performs in accordance
with individual SWCI test specifications and the CI interface requirements. TerreStar shall have the right to observe and monitor the CI tests. Following completion of testing, the Contractor shall document the test results, deviations from test
procedures, and all software anomalies and submit a report to TerreStar. 
 The Contractor shall support Chipset integration and test with the
UE and the S-BSS. The Contractor shall provide all necessary test tools and equipment to support Chipset integration and test with the UE and the S-BSS. 

3.3.5 Hardware Design and Test 

3.3.5.1 Hardware Development Plan 

The Contractor shall provide a Hardware Development Plan (HDP) in accordance with paragraph 3.7.1.6 of this SOW. The H/W development shall be
managed in accordance with the HDP through delivery of all functionality releases of the Chipset Program. 
 All hardware designed or modified,
developed, manufactured, assembled, and tested by the Contractor or its Subcontractors shall be in accordance with the requirements of the Program Product Assurance Plan. The Contractor shall document functional hardware requirements in the Hardware
Design Specification, validating the traceability of the requirements from the System Performance Specification. The Hardware Design Specification detail shall be sufficient to ensure a common understanding of the requirements; ensure that
requirements are complete, consistent, and testable; and define the inputs and outputs for every function. The hardware shall be designed and selected or developed to facilitate life-cycle maintenance and to permit access to facilitate replacement
of components. The Contractor shall provide recommended procedures for maintaining the equipment in the CI and System Maintenance Procedures. 

3.3.5.2 Contractor Developed Hardware 

The Satellite Baseband hardware shall be developed in two phases. The Contractor shall perform the planning, coordination, and implementation of the tasks
required to develop the Chipset hardware developed tools, engineering aids, simulators, and tests aids. 
 3.3.5.3 Phase 1 Hardware 

 In Phase 1, the Contractor shall design and deliver a reference design using discrete components (ref section 3.1.1 ) capable of
performing all Release 1 and 2 functionality in accordance with the specification. A prototype of this design shall be made available to TerreStar’s chosen terminal vendor. The terminal vendor shall manufacture Phase 1 UE. The Contractor shall
provide all necessary documentation to enable the terminal vendor to manufacture, integrate, and test the reference platform design in a user terminal. The Contractor shall support the integration and testing of the satellite chipset into the UE.

  

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 3.3.5.4 Phase 2 Hardware 

In Phase 2, the Contractor shall design and deliver the complete satellite baseband in a single custom ASIC capable of performing S-BSS Release 2
functionality. The Contractor shall integrate and test the Satellite Chipset with the Oberon Integration Board. 
 Oberon Integration Board:

 The Contractor shall supply the Oberon Integration Board. This board shall house the custom ASIC (Oberon) as well as the RF Transceiver part
(Freescale Python) that was selected by TerreStar. The Oberon Integration Board shall house 2 RF Transceivers in order to support receiver diversity (Note: The RF front end (LNA, PA, filters etc) are not included in the scope of the Chipset Work
under this SOW. 
 The Oberon Integration Board shall be able to operate in a lab bench setting for ASIC DVT and for integration with the S-BSS.

 The Oberon Integration Board shall be capable of connecting to the Elektrobit Phase 1 Macro Board. The baseband interface shall be carried
through the connector to the Macro Board. 
 The Oberon Integration Board shall have two connectors capable of connecting to the Elektrobit
Phase 1 Front End RF Macro board, supporting one transmit path and 2 receiver paths for receiver diversity. 
 3.3.5.5 Hardware Test

 The Contractor shall generate and utilize test plans, procedures, and reports to verify that each hardware configuration item (HWCI)
performs in accordance with individual CI test specifications and the interface requirements for each input and output port. TerreStar shall have the right to observe and monitor the CI tests. Following completion of testing, the Contractor shall
document the test results, deviations from test procedures, and all hardware anomalies and submit a report to TerreStar. The Contractor shall support Chipset integration and test with the UE and the S-BSS. The Contractor shall provide all necessary
test tools and equipment to support Chipset integration and test with the UE and the S-BSS. (In the case of Phase-2, the UE is the Oberon Integration Platform with the Elektrobit Macroboard.) 

 
  

3.4 PRODUCTION AND IMPLEMENTATION 

3.4.1 Production Process, Quality Assurance, and Configuration Management 

The Contractor shall establish a production process and be responsible for the procurement, manufacture, assembly, test and integration of the hardware
and software required for the delivery of a complete and operating Chipset. 
 All production and implementation of deliverable equipment shall
be in accordance with the requirements of the Chipset Hardware Development Plan, Software Development Plan, the Product Assurance Plan, and the Manufacturing Quality Assurance Plan. 

The Contractor shall be responsible for the configuration management of the Contractor-controlled baseline and shall maintain configuration management
until completion of Chipset Phase 2 Satellite Chip Final Acceptance in accordance with the schedule in Section 4.0 . 
  

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 3.4.2 COTS 

3.4.2.1 COTS Procurement 
 The
Contractor shall be responsible for the procurement of the COTS hardware and software and for the verification of its performance. All COTS components shall be selected to facilitate life-cycle maintenance. The configuration shall permit SW/FW
over-the-air updates over both the satellite and ATC networks where appropriate. The terminal vendor shall be responsible for procuring any required COTS for the reference UE and manufacturing other than the Chipset prototypes provided by the
Contractor (ref Section 3.6 ). 
 If commercial off-the-shelf (COTS) software is used in the design, it shall be products with
demonstrable probability for support five years after Phase 2, Release 2 Final Acceptance. 
 3.4.2.2 COTS Performance Verification 

 The Contractor shall define the specific verification methods to be used to assure the acceptable performance of all COTS hardware and
software items selected to fulfill the Chipset requirements. For equipment acquired from original equipment manufacturers or other vendors, one or more levels of testing may be performed in the factory according to vendor’s methods which
conform to industry standards, or according to approved procedures. Factory demonstrations, post-installation verification testing and other standard evaluation methods to ensure that acquired components operate as specified shall be identified in
the System Integration and Test Plan. Vendor-supplied documentation, including user’s guides and operation procedures, shall be validated for accuracy and completeness for UE use prior to final acceptance from the vendor. 

3.4.2.3 COTS Post Installation Testing 

Following installation in the reference UE, additional COTS functional and performance tests may be required to ensure that the item has been properly
integrated with other UE components and continues to operate as specified. It shall be the Contractor’s responsibility to insure ongoing satellite UE operation and performance in accordance with the requirements of the specification.

  
  

3.5 TECHNICAL AND OPERATIONAL VERIFICATION PHASES 

3.5.1 General 
 The Contractor shall
demonstrate Chipset Technical and Functionality performance in a series of formal tests and demonstrations using simulators/emulators, and actual operational components. The formal tests shall be executed using Test Procedures approved by TerreStar
and generated in accordance with the System Integration and Test Plan. The formal tests and demonstrations shall include active TerreStar and QA participation in development and execution of procedures and for Phase 1 Chipset, delivery of a working
UE from TSN. The Contractor shall execute the following formal tests: For Phase 1 Chipset: DVT, prior to the final delivery of the Phase 1 hardware solutions to the terminal vendor; Technical and Operational Verification Tests in conjunction with
the S-BSS; For Phase 2 Chipset: DVT, Lab Integration Test and a Device Qualification Test (DQT). For Phase-1, during the Operational Verification Test executed by TerreStar, the Contractor shall provide Chipset technical support throughout the
duration of the test. Each formal test shall be preceded by a Test Readiness Review (TRR) conducted by the Contractor. During the TRR, all aspects of the formal test shall be reviewed and assessed for readiness to start testing including personnel,
hardware, software, procedures, and external coordination (i.e. satellite 
  

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 monitoring, external interface support, etc.). A go/no-go assessment is made by TerreStar at the
conclusion of the TRR. 
 TerreStar desires joint participation in the TVT and OVT to facilitate a more rapid transition to operations. During
the TVT, both TerreStar and Contractor personnel shall take part in the integration and test activities as active members of the test team, under the direction of Contractor management. During OVT, both TerreStar and Contractor personnel shall take
part in the test activities as active members of the test team, under the direction of TerreStar management. For the purpose of clarity, the TVT and OVT are for Phase 1 Chipset. The Phase 2 Chipset tests shall be lab tests. 

3.5.2 Test Objectives 
 Each Formal
Test accomplishes the following. The Contractor responsibilities for each of these tests are stated in other parts of the SOW. 

Figure 3-1 Chipset Test Objectives 
  

							
	 Test
	  	 Objective
	  	Entry Criteria	  	Success Criteria
				
	 [***]
	  	[***]	  	[***]	  	[***]
				
	 [***]
	  	[***]	  	[***]	  	[***]
				
	 [***]
	  	[***]	  	[***]	  	[***]
				
	 [***]
	  	[***]	  	[***]	  	[***]

 3.5.3 Design Verification 

The DVT is a hardware centric test. The functions and objective performance of each Chipset Functionality Release shall be verified during a DVT for each
phase and each release within a phase. 
 For the Phase 2 DVT, the 10x bearer channel size shall be tested at the PHY layer between the Oberon
Integration Board and the SBSS. (Note: Performance of the 10x bearer channel may be limited by the Python RF Transceiver chip.) 

3.5.4 Device Qualification Test 
 At
the completion of DVT, the ASIC Fabrication Vendor must finalize their Device Qualification Testing (DQT) before ramping up high volume production on the ASIC. The DQT encompasses Wafer Process Qualification and Package Qualification requirements.
DQT ensures that the ASIC can be reliably manufactured in high volume. 
 3.5.5 Phase 2 Lab Integration Test 

The Phase 2 Lab Integration Test shall demonstrate the integration of the Phase 2 Chipset together with the Oberon Integration Board and the Phase 1 Macro
Board with the S-BSS. The Testplan for the Lab Integration Test is to be mutually agreed upon by both parties. 
  

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 Note: Scope of the test is limited to functionality supported by the Phase 1 Macro Board. For example,
10x bearer may not be tested in a Full End-to-End test with the S-BSS. 
 Phase 2 Lab Integration Success Criteria: 

 

	 	-	All technical specifications that can reasonably be tested by the Phase 2 Test Platform are met. 

 

	 	-	Mutually agreed work off plan for all open problem reports that can be closed with the Phase 2 Test Platform 

The Phase 2 Test Platform consists of the Oberon Integration Board in combination with the Phase 1 Macro Board and connected to the SBSS with the
necessary simulators in a lab environment. 
 3.5.6 UE Integration 

The Contractor shall support integration of all hardware and software elements of Phase 1 into the UE. The Contractor shall use the integrated
satellite/ATC UE to perform integration of the UE with the S-BSS and other TSN segments as described in the S-BSS documentation. The integration activities shall be in accordance with the Contractor developed System Integration and Test Plan and the
Product Assurance Plan and shall include TerreStar engineers under the direction of Contractor management. Full access to all System components at all times shall be granted to TerreStar personnel. 

3.5.7 Integration with Additional terminals 

The contractor shall support user terminal integration for up to two additional RF transceiver ASICs with schedule and cost proposed and contracted
separately within 3 years from the end of this contract. Subsequent releases/enhancements of a given RF transceiver ASIC with no changes in interface specification will be considered as the same ASIC type and not as another ASIC type. 

The contractor shall support user terminal integration for up to two additional ATC Baseband processors with schedule and cost proposed and contracted
separately within 3 years from the end of this contract. Subsequent releases/enhancements of a given ATC Baseband processor with no changes in interface specification will be considered as the same ASIC type and not as another ASIC type. 

3.5.8 Test Discrepancies 
 The
Contractor shall use its approved Product Assurance Plan processes to document, correct, and regression test system test discrepancies. These discrepancies shall be corrected prior to the start of the next formal test or at a later time approved by
TerreStar. 
 3.5.9 Test Reports 

The Contractor shall prepare test reports documenting the results of the test activity, including procedures executed, procedure pass/fail status,
discrepancies discovered, and data collected. Discrepancies that cause system degradation or indicate a failure to meet performance specifications shall be discussed with system impact defined and correction plans indicated. 

 

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 3.5.10 Technical Verification (reference S-BSS SOW Section 4.2.8) 

Technical verification for Phase 1 shall be conducted according to the Contractor’s Program Management Plan, System Integration and Test Plan
(includes S-BSS and Chipset), the Product Assurance Plan, and the Contractor developed test procedures. Suggested efforts are as follows and required milestones are defined. Each Functionality Release shall have a Technical Verification Test.

 3.5.10.1 Technical Verification Review Purpose 

There shall be a Technical Verification Review (TVR) for Phase 1 and each functionality release within Phase 1 to determine: 1) if the technical
performance of the Phase 1 Chipset/S-BSS meets the requirements of Exhibit B and 2) if the required functionality and capacity for the release is operating in accordance with the design and requirements. 

3.5.10.2 Technical Verification Review Scope 

During the TVRs the Contractor shall present information on the readiness of the Chipset/S-BSS including: a review of the Technical Verification Test
results to validate proper technical performance; a complete report on all open problem reports that summarize the issue, the severity, the resolution plan, and when the problem will be available for integration into the operational system;
operations and maintenance procedures; Chipset/S-BSS stability and availability; and other technical and operational readiness issues. 

3.5.10.3 Technical Verification Review Deliverables 

Test Reports; technically verified Chipset/S-BSS; problem report work-off plan. 

3.5.10.4 Technical Verification Review Success Criteria 

The data presented at the TVR shall be assessed and a determination made on the readiness of the Chipset/S-BSS to enter the Operational Verification
Phase. The following criteria shall be met. An assessment that the Chipset/S-BSS is ready for Operational Verification must be made to successfully complete the TVR. 

 

	 	-	All technical specifications required for the release met. 

  

	 	-	Chipset and S-BSS operate together to provide the communications functionality specified 

 

	 	-	All revenue impacting problem reports closed. 

  

	 	-	Mutually agreed work off plan for all open problem reports 

3.5.11 Operational Verification (reference S-BSS SOW Section 3.5, 3.9, and 4.3) 

Operational verification for Phase 1 shall be conducted according to the Contractor’s Program Management Plan, TerreStar System Integration and Test
Plan (includes S-BSS and Chipset), the Product Assurance Plan, and the jointly developed operational procedures. Each Functionality Release shall have an Operational Verification Test. 

3.5.11.1 Operational Readiness Review (ORR) 

3.5.11.2 Operational Readiness Review Purpose 

There shall be an ORR for each Release 1 and 2 for Phase 1 to determine if the required functionality and capacity for the release is operating in
accordance with the design and requirements. 
  

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 3.5.11.3 Operational Readiness Review Scope 

Review Operational Verification Test results for trouble reports, system stability, operational procedure quality, personnel training, and other pertinent
requirements. 
 During the ORRs the Contractor shall present information on the readiness of the Chipset/S-BSS including: a review of the
Chipset/S-BSS technical performance during the Operational Verification Test to validate proper technical performance; a complete report on all open problem reports that summarize the issue, the severity, the resolution plan, and when the problem
will be available for integration into the operational system; Chipset/S-BSS stability and availability; and other technical and operational readiness issues. 

3.5.11.4 Operational Readiness Review Deliverables 

Operationally verified Chipset/S-BSS. Problem report work-off plan. 

3.5.11.5 Operational Readiness Review Success Criteria 

The data presented at the ORR will be assessed and a determination made on the readiness of the Chipset/S-BSS to enter Revenue Service. The following
criteria shall be met. An assessment that the Chipset/S-BSS is ready for Revenue Service must be made to successfully complete the ORR and for Provisional and/or Final Acceptance to occur. 

 

	 	-	All technical specifications required for the release met. 

  

	 	-	All revenue impacting problem reports closed. 

  

	 	-	Chipset/S-BSS system meets availability requirements as defined in Exhibit B. 

 

	 	-	Items identified as required for the ORR in the TVT problem report work off plan successfully completed 

 

	 	-	All Operations and Maintenance Handover tasks completed 

  

	 	-	Mutually agreed work off plan for all open problem reports 

  

 
 3.6 COMPONENT DELIVERABLES

 The Contractor shall deliver the hardware and software required to provide the full capability and service features for each Functionality
Release as described in the Functional Requirements that are fully compatible with S-BSS. These include: 
  

	 	•	 	 Intermediate Deliverables — Section 4.0 describes several intermediate deliverables the Contractor shall make primarily to the terminal
vendor. These deliverables are critical to the work flow required to provide a market ready handset. The deliverables and the associate success criteria shall be defined as described in Section 3.7.1.1

 

	 	•	 	 Fully Certified (with respect to Satellite Portion) Phase 1 Satellite Component for TerreStar UE, operational in each final factor delivered from the
Terminal Vendor, and fully integrated and operational with the S-BSS 

  

	 	•	 	 Discrete Reference Design using COTS HW 

  

	 	•	 	 Release 1 SW , as modified by O3M, C-PDR, and P6M, operational in each form factor 

 

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

	 	•	 	 Phase 1, S-BSS Release 2 SW, as modified by O3M, C-PDR, P6M, with all Phase 1 Release 1 problem report resolutions 

 

	 	•	 	 Phase 2 ASIC integrated and tested with the S-BSS 

  

	 	•	 	 o Phase 2 Satellite Chipset Tests: DVT and SBSS Integration Tests with compliance to the Phase 2 Chipset Requirements as can be reasonably tested in
the Oberon Integration Board Test Platform. 

  

	 	•	 	 Reference Design using ASIC HW 

  

	 	•	 	 Phase 2, S-BSS Release 2 SW, as modified by O3M, C-PDR, P6M with all Phase 1 problem report resolutions incorporated and can be reasonably tested in
the Oberon Integration Board Test Platform. 

 3.6.1 Phase 1 — Discrete Reference Design 

The Contractor shall deliver 30 units reference hardware containing the satellite baseband solution in a form to be agreed at C-PDR. The reference design
shall satisfy the functional and technical requirements specified in the Chipset and S-BSS Technical Specifications as modified by O3M, C-PDR, and P6M analyses and shall be fully compliant with all certification requirements. SW/FW for Phase 1 shall
be delivered in a minimum of two releases. The initial release shall provide the full capability of the Release 1 S-BSS and the GMR-3G CAI as modified by the O3M, C-PDR, and P6M analyses. The Phase 1/Release 1 HW and SW shall be fully compliant with
the certification requirements (ref Section 2.0 ). The final release shall provide the full capability of the Release 2 S-BSS and the GMR-3G CAI as modified by the O3M, C-PDR, and P6M analyses. The Phase 1/Release 2 HW and SW shall be
fully compliant with all certification requirements (ref Section 2.0 ). 
 3.6.2 Phase 2 ASIC Platform 

The Contractor shall deliver 10 units of the custom ASIC satellite baseband solution. The ASIC shall satisfy the functional and technical requirements
specified in the Chipset Technical and S-BSS Technical Specifications as modified by O3M, C-PDR, and P6M analyses and shall be fully compliant with all certification requirements as can be reasonably tested in the Oberon Integration Board Test
Platform. SW/FW for Phase 2 shall be delivered in a minimum of one release. The need for a second release shall be mutually agreed to at C-PDR. The release shall provide the full capability of the Release 2 S-BSS and the GMR-3G CAI as modified by
the O3M, C-PDR, and P6M analyses. The Phase 2 HW and SW shall be fully compliant with all certification requirements (ref Section 2.0 ) as can be reasonably tested in the Oberon Integration Board Test Platform. 

 
  

3.7 DOCUMENTATION 
 The Contractor
shall follow industry standard documentation and data management practices and procedures. 
 Documentation shall be delivered in a format
compatible with the latest version of Microsoft Office Professional Edition 2003 or higher and shall be transferred electronically. Delivery shall be in accordance with the schedules defined below and shall allow a minimum of three weeks for
TerreStar review prior to approval. TerreStar shall approve/disapprove all documentation within four weeks of receipt of final copy. Information contained in each document shall be as proposed by the Contractor. The 

 

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 documents to be delivered for the Kick-Off Meeting shall be delivered for review at a mutually agreed
date to allow TerreStar sufficient preparation time for the meeting. 
 Table 3-1. Contract Deliverable Schedule 

  

													
	 Deliverable
	  	[***]	  	[***]	  	[***]	  	[***]	  	[***]	  	Comments
	 [***]
	  	[***]	  		  		  		  		  	
	 [***]
	  	[***]	  		  		  		  		  	
	 [***]
	  	[***]	  		  		  		  		  	
	 [***]
	  		  	[***]	  		  		  		  	
	 [***]
	  	[***]	  		  		  		  		  	
	 [***]
	  	[***]	  		  		  		  		  	
	 [***]
	  	[***]	  		  		  		  		  	
	 [***]
	  		  	[***]	  		  		  		  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]	  		  	
	 [***]
	  		  	[***]	  		  		  		  	
	 [***]
	  		  	[***]	  		  		  		  	
	 [***]
	  	[***]	  	[***]	  		  		  		  	
	 [***]
	  	[***]	  	[***]	  		  		  		  	
	 [***]
	  		  	[***]	  	[***]	  	[***]	  		  	
	 [***]
	  		  		  		  	[***]	  	[***]	  	
	 [***]
	  		  		  	[***]	  	[***]	  	[***]	  	[***]
	 [***]
	  		  		  		  		  		  	[***]
	 [***]
	  		  		  		  		  		  	[***]
	 [***]
	  		  		  	[***]	  	[***]	  		  	
	 [***]
	  		  		  		  		  	[***]	  	
	 [***]
	  		  		  		  		  	[***]	  	

 3.7.1 Documentation Descriptions 

3.7.1.1 Program Master Phasing Schedule 

The Program Master Phasing Schedule shall define the following: 
  

	 	•	 	 The top level milestones phased with the TerreStar Master Program milestones and the terminal vendor milestones to ensure Chipset development, test,
and integration supports TerreStar program objectives. 

  

	 	•	 	 Detailed task lists that define all the tasks required for successful completion of the program. 

 

	 	Note:	A rolling wave plan may be used that details in high detail the next 3-4 months of effort and lesser detail further out in the time line. As each month goes by,
detail is added to maintain the 3-4 month “rolling wave” of detail. 

  

					
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

	 	•	 	 The Master Phasing Schedule shall be delivered and baselined at the Kick-Off review. All milestones required for fully coordinated reference terminal
and Chipset programs shall be presented. All coordination milestones shall fully define the item to be delivered (e.g. specification, prototype HW, diagnostic SW, etc), the acceptance criteria to be satisfied before the item is accepted, and the
potential impact to subsequent execution of either program and ultimately to UE certification and S-BSS and Chipset Acceptance. Changes to the baseline schedule shall be approved by TerreStar. 

3.7.1.2 Program Management Plan 

The program management plan, developed as part of the S-BSS development program, shall be updated to cover the chipset development activities. 

3.7.1.3 Product Assurance Plan 
 The
product assurance plan, developed as part of the S-BSS development program, shall be updated to cover the chipset development activities. 

3.7.1.4 System Engineering Design Plan 

The engineering design plan, developed as part of the S-BSS development program, shall be updated to cover the chipset development activities. 

3.7.1.5 Software Development Plan 

The Contractor shall provide a Software Development Plan in accordance with normally accepted commercial practice. The plan shall be delivered in final at
the Kick-Off Meeting. 
 3.7.1.6 Hardware Development Plan 

The Contractor shall provide a Hardware Development Plan that defines the hardware development process to be used for the development of the Phase 1
reference daughter card and Phase 2 ASIC. 
 3.7.1.7 Data Management Plan 

The data management plan, developed as part of the S-BSS development program, shall be updated to cover the chipset development activities. 

3.7.1.8 System Performance Specification 

The System Performance Specification shall define the functional performance, interface, and quality requirements of the Chipset and shall include a
verification matrix to define how and when each requirement in the SPS will be verified (analysis, inspection, test, computer simulation; unit test, subsystem test, etc.). 

In particular, the performance limits of the Phase 1 deliverables will be identified. 

3.7.1.9 Interface Control Document 

The Contractor shall provide an Interface Control Document that describes both physically and functionally all internal and external system interfaces.

  

					
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 3.7.1.10 Hardware Requirements Document 

The Contractor shall provide a Hardware Requirements Document that allocates functional and performance requirements from the SPS to the system hardware.
This document shall be used as the basis for the Hardware Design Specification. 
 3.7.1.11 Software Requirements Document

 The Contractor shall provide a Software Requirements Document that allocates functional and performance requirements from the SPS to the
system software. This document shall be used as the basis for the Software Design Specification. 
 3.7.1.12 Integration and Test Plan

 The Contractor shall provide a Chipset Platform Integration and Test Plan that reasonably conforms with the Test Concept document
previously provided to Contractor and that details the test philosophy and test process to be used to accomplish system integration and technical and operational verification. The plan shall include structured progressively more complex testing,
that is, unit tests, CI integration tests, subsystem integration tests, consent-to-ship tests, technical verification tests, and operational acceptance tests. The plan shall define Contractor and TerreStar participation in each test phase. The plan
shall specify retest requirements and test environments. The plan shall include a Verification Cross Reference Matrix (VCRM) that maps the requirements of the specifications and the SOW to the test phase and shall indicate the verification method
(inspection, documentation, test, or analysis). 
 The Test Plan shall define a problem reporting process that contains defined severity levels
with Contractor response and resolution times specified. 
 3.7.1.13 Specification Traceability Matrix 

The specification traceability matrix as part of the S-BSS development program, shall be updated to cover the chipset development activities. 

3.7.1.14 Hardware and Software Design Specifications 

The Contractor shall provide design specifications for each hardware and software configuration item. The specification shall be written in a format
provided by the Contractor and shall include: a configuration item definition, interface definitions, major components, characteristics, design and construction standards, physical and functional characteristic, and test requirements, etc.

 3.7.1.15 Manufacturing QA Plan 

The manufacturing QA plan, developed as part of the S-BSS development program, shall be updated to cover the chipset development activities. 

3.7.1.16 System Test Procedures 

The Contractor shall develop System Test Procedures to test and validate system performance during the formal test activities. 

3.7.1.17 Test Reports 
 The
Contractor shall deliver a test report at the conclusion of each formal test activity. These reports are described in Section 3.5.9 . 
  

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 3.7.1.18 Project Status Reports 

The project status reports, developed as part of the S-BSS development program, shall be updated to cover the chipset development activities. 

3.7.1.19 Support Plan 
 The
Contractor shall develop a Support Plan which details the organization and activities necessary to provide support for Chipset. 

3.7.1.20 ASIC Data Sheet 
 The
Contractor shall provide an ASIC Data Sheet that describes the interfaces, pin-outs, and registers. 
 3.7.1.21 ASIC Procurement
Specification 
 The Contractor shall provide an ASIC procurement specification that defines the ASIC marking, I/O loading, and electrical
parameters. 
  
  

3.8 CHIPSET PRICE ESTIMATES 
 The
consumer market for cellular equipment has proven to be extremely sensitive to internal component prices. Small percentage increases can cause the handset price to exceed consumer expectations and result in reduced sales. With this background, it is
imperative that the Contractor and TerreStar work together to ensure a Chipset price that is in line with TerreStar market needs and competitive with other consumer wireless devices. This process will evolve from preliminary cost estimates through
to final pricing including volume discounts. The Contractor shall support TerreStar in developing these price estimates starting at C-SRR. All pricing will be finalized in a subsequent Production Contract. 

 
  

3.9 CUSTOMER FURNISHED ITEMS 

TerreStar shall provide suitable design documentation and support materials according to the following schedules. 

3.9.1 User Terminal Chipset, Vocoder, and Support 

Note: Anywhere ATC baseband processor is mentioned in the following tables it may mean ATC baseband chip only, ATC baseband chip plus multimedia
accelerator, or ATC baseband chip plus additional application processor. 
 Table 3-2. User Terminal Chipset, Vocoder and
Support 
  

					
	 Section
	  	Reference	  	 Requirement

	3.9.1	  	1	  	TerreStar shall conclude the evaluation and selection of the ATC Baseband Processor and the Satellite RF chipsets by [***].
		  	2	  	TerreStar shall provide the detailed specification, reference development boards, samples and access to the design support of ATC Baseband Processor and Satellite RF
chipsets by [***].

  

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

					
		  	3    	  	Final Vocoder selection and specifications by [***] (The Contractor and TSN in cooperation).
		  	4    	  	TerreStar shall provide the vocoder software in suitable form for the satellite mode that resides in the ATC Baseband processor by [***].
		  	5    	  	TerreStar shall provide the support to define the Hardware and Software ICD between the Satellite and ATC Baseband in accordance with the Deliverable Schedule in Table
3-4.

  

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 3.9.2 User Terminals using Phase 1 and Phase 2 Satellite Baseband Hardware 

Table 3-3. User Terminals using Phase 1 and Phase 2 Satellite Baseband Hardware 

 

					
	 Section
	  	Reference	  	 Requirement

	3.9.2	  	1	  	TerreStar shall provide non-form (“Macro Based”) fit prototype User Equipment (UE) that uses the Phase 1 Satellite Baseband solution in accordance with the
milestone schedule in Section 4. Twenty-four (24) units required. Non Access Stratum code required. This is for integration with the Contractor Protocol Stack and Physical Layer
		  	2	  	TerreStar shall provide form fit prototype User Equipment (UE) that uses the Phase 1 Satellite Baseband solution by in accordance with the milestone schedule and
functionality defined in Section 4. Twenty-four (24) units required.
		  	3	  	TerreStar shall provide prototype User Equipment for the Phase 2 ASIC Satellite Baseband solution by providing and supporting 8 Phase 1 Macro Boards. For purposes of
clarity, TerreStar support shall include SW updates for the Phase 1 Macro board where modifications are required to support Oberon specific functionality.
		  	4	  	TerreStar shall provide the necessary UE technical support during the Integration, Technical, Design, and Operational Verification Phases.
		  	5	  	 TerreStar shall provide a phone test tool to exercise and monitor message activity of the Non-access Stratum (NAS) stack on
the ATC baseband processor. Need time no later than [***]. The test tool is ATC Baseband Processor dependent. The desired capabilities are as agreed in a telcon between the terminal vendor and the Contractor on [***], and include: scripting and
logging functionality; interfaces to monitor UMTS L2/L3 layer activity; interfaces to monitor GMR3G L2/L3 activity. This test tool will be used to drive the UE when testing with S-BSS. The Contractor will require training and technical support on
the prototypes and test tool. TerreStar shall provide a date the test tool is available for Contractor use at C-SRR.
 This shall be met by
TerreStar providing and supporting 8 Phase 1 Macro Boards during the Phase 2 Development.

 3.9.3 CFE Design Materials
Deliverables 
 TerreStar shall provide suitable design documentation and support materials according to the following schedule. 

TerreStar shall support the integration of the software in the ATC Baseband processor that includes training and documentation. The integration of the
satellite mode with the ATC Baseband processor may involve modifications to the terrestrial mode physical layer drivers and access to terrestrial mode data. 
  

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 3.9.3.1 Phase 1 

All CFE material in Table 3-4 has been delivered except item 14, at the time of the finalization of this SOW. Therefore, no further activity in this area
is required, except for item 14, which is an on-going activity during Phase 1. 
 Table 3-4. CFE Design Materials Deliverables
— Phase 1 
  

							
	 Section
	  	Reference	  	 Requirement

	 3.9.3.1
	  	1	  	[***]	  	[***]
		  	2	  	[***]	  	[***]
		  	3	  	[***]	  	[***]
		  	4	  	[***]	  	[***]
		  	5	  	[***]	  	[***]
		  	6	  	[***]	  	[***]
		  	7	  	[***]	  	[***]
		  	8	  	[***]	  	[***]
		  	9	  	[***]	  	[***]
		  	10	  	[***]	  	[***]
		  	11	  	[***]	  	[***]
		  	12	  	[***]	  	[***]
		  	13	  	[***]	  	[***]
		  	14	  	[***]	  	[***]

 3.9.3.2 Phase 2 

The Phase 2 ATC Baseband (Infineon PMB8878) chip and RF chip (Python) are the same as Phase 1. Note that the Python chip in Phase 2 shall use the DIGRF3G
interface to the Phase 2 Satellite BB Chipset. 
 Table -3-5. CFE Design Materials Deliverables — Phase 2

  

							
	 Section
	  	Reference	  	 Requirement

	 3.9.3.2
	  	1	  	[***]	  	[***]
		  	2	  	[***]	  	[***]
		  	3	  	[***]	  	[***]
		  	4	  	[***]	  	[***]
		  	5	  	[***]	  	[***]
		  	6	  	[***]	  	[***]
		  	7	  	[***]	  	[***]
		  	8	  	[***]	  	[***]
		  	9	  	[***]	  	[***]
		  	10	  	[***]	  	[***]
		  	11	  	[***]	  	[***]
		  	12	  	[***]	  	[***]

  

			
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	TerreStar Satellite Chipset SOW	  	 

  

					
	 13
	  	[***]	  	[***]
	 14
	  	[***]	  	[***]
	 15
	  	[***]	  	[***]

  

 
 3.10 DEVELOPMENT FLOW 

3.10.1 Phase 1 Development 
 Once
the selection of the ATC Baseband and RF Chips are made, the Contractor shall start the build of the Phase 1 reference platform. The Contractor shall deliver the Phase 1 hardware to the terminal vendor. The terminal vendor shall integrate the Phase
1 hardware into a prototype reference user terminal provided to the Contractor for software verification. The Contractor shall release a minimum of three diagnostic software releases to the terminal vendor at the dates listed in
Section 4.0 . Patches and other software problem fixes shall be provided as necessary to successfully complete the reference UE design. These software releases are intended to verify the Phase 1 hardware interfaces and basic receive and
transmit functionality. At the completion of the diagnostic integration, the Contractor shall carry out a Design Verification Test (DVT) to validate all performance and functional attributes of the Phase 1 chipset platform. At this point,
pre-production parts will be available and the reference UE will be provided to the Contractor. The Contractor shall then be responsible for integration and test of the satellite air interface protocol as described in the S-BSS SOW. TerreStar and
the reference terminal vendor shall support this integration and test as necessary to resolve issues that arise. 
 Note that the Release 1 TVT
and OVT are split into two separate campaigns: Release 1.1 and Release 1.5 with release content as defined in the SBSS SOW and Technical Specification. 

[***] 
 Figure 3-1 Phase
1 Development 
 3.10.1.1 Incremental Phase Modulator For Phase 1 

In order to accommodate the frequency offset limitation of the Python RFIC chip, an Incremental Phase Modulator is required in the Phase-1 Chipset.
Contractor to add the Incremental Phase Modulator (“IPM”) to the FPGA that is part of the Phase-1 Chipset solution, and to add the necessary software to control this new FPGA function. 

The IPM will be implemented in the FPGA and rotates the phase of the I and Q signals according to the desired frequency offset. The IPM is used within
the Python’s frequency offset step size. Larger frequency offsets require Python frequency offset correction and a corresponding IPM correction in the FPGA. 

Freescale Python Requirements (CFE): 
 The
Python firmware must allow direct programming of the M and N registers in the TX PLL by the AS/PHY software. 
  

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 3.10.2 Phase 2 Development 

The Phase 2 development under this SOW shall use the same RF chip and ATC Baseband chip as Phase 1. 

In Phase 2 Development, the ASIC development can begin once the foundry is selected for fabrication. The ASIC development process includes design,
verification, physical design and fabrication. The ASIC prototypes shall be provided to Contractor for placement on the Oberon Integration Board. The ASIC shall be verified using Contractor diagnostic releases on the Oberon Integration Board in
combination with the Phase 1 Macro Board. At the completion of the diagnostic integration, the Contractor shall carry out a DVT to validate all performance and functional attributes of the Phase 2 chipset platform. At this point, pre-production
parts will be available. The Contractor shall then be responsible for integration and test of the satellite portion, including all mobility functionality, with the S-BSS in a lab environment. TerreStar shall support this integration and test as
necessary to resolve issues that arise. 
 After DVT, the Contractor will also carry out DQT after which the production ASICs will be made
available to TerreStar. 
 [***] 

FIGURE 3-2 PHASE 2 DEVELOPMENT 

3.10.2.1 Oberon Integration Platform for Phase 2 Development 

The Oberon Integration Platform shall be developed by Contractor with technical capabilities as described in Exhibit B2. This includes the development and
testing of a board to house the Oberon ASIC. The Oberon Integration Platform will interface to the Phase-1 Makroboard and will be tested with the SBSS in a lab setting. 
  

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 4.0 PROJECT SCHEDULE 

As stated throughout this SOW, the Chipset and S-BSS development, through the Chipset Amendment, are considered one program with three projects (S-BSS,
Phase1 Chipset, and Phase 2 Chipset). In addition, the Chipset and terminal vendor projects are critically interdependent. Each of the milestones identified in Section 3.9 above, the tables below, and others to be identified in more
detailed planning between the parties, is critical to developing an operational UE. If the Contractor or TerreStar fail to meet a milestone, the lost schedule time may not be recoverable. The Contractor and TerreStar shall make best efforts to meet
each milestone with the required functionality. Continual monitoring of program progress shall be made with schedule risks and potential impacts identified as soon as possible. If a milestone is missed, the affected party shall immediately notify
the other of the impact to future deliveries. Both parties shall work to mitigate the impact and recover the lost schedule time if possible. Mitigation actions shall be mutually agreed and direction to implement the mitigation plan shall be made by
TerreStar. 
 TABLE 4-1. SATELLITE CHIPSET MASTER PROJECT MILESTONES 

 

							
	 No.
	  	 Milestone Activity
	  	 Purpose
	  	 Date

				
	 1.
	  	[***]	  	[***]	  	[***]
				
	 2.
	  	[***]	  	[***]	  	[***]
				
	 3
	  	[***]	  	[***]	  	[***]
				
	 3a.
	  	[***]	  	[***]	  	[***]
				
	 4.
	  	[***]	  	[***]	  	[***]
				
	 5.
	  	[***]	  	[***]	  	[***]
				
	 6.
	  	[***]	  	[***]	  	[***]
				
	 7.
	  	[***]	  	[***]	  	[***]

  

			
	Use or disclosure of the data contained on this sheet is subject to the 
restriction on the title page.	  	 Version 2.4

06/25/09
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38

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

  
	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 TABLE 4-2. SATELLITE CHIPSET PHASE 1 PROJECT MILESTONES 

 

							
	 No.
	  	 Milestone Activity
	  	 Purpose
	  	 Date

				
	 1.
	  	[***]	  	[***]	  	[***]
				
	 2
	  	[***]	  	[***]	  	[***]
				
	 3
	  	[***]	  	[***]	  	[***]
				
	 4
	  	[***]	  	[***]	  	[***]
				
	 5
	  	[***]	  	[***]	  	[***]
				
	 6
	  	[***]	  	[***]	  	[***]
				
	 7
	  	[***]	  	[***]	  	[***]
				
	 8
	  	[***]	  	[***]	  	[***]
				
	 9
	  	[***]	  	[***]	  	[***]
				
	 10
	  	[***]	  	[***]	  	[***]
				
	 11.
	  	[***]	  	[***]	  	[***]
				
	 11a
	  	[***]	  	[***]	  	[***]
				
	 12.
	  	[***]	  	[***]	  	[***]
				
	 13.
	  	[***]	  	[***]	  	[***]
				
	 13a
	  	[***]	  	[***]	  	[***]
				
	 13b
	  	[***]	  	[***]	  	[***]
				
	 13c
	  	[***]	  	[***]	  	[***]
				
	 14
	  	[***]	  	[***]	  	[***]
				
	 14a
	  	[***]	  	[***]	  	[***]
				
	 15
	  	[***]	  	[***]	  	[***]
				
	 15a
	  	[***]	  	[***]	  	[***]
				
	 16
	  	[***]	  	[***]	  	[***]
				
	 17
	  	[***]	  	[***]	  	[***]

 [***]6.3 CTS_R1_SERV_002 –
UT to UT Ping 6-8[***]6.4 CTS_R1_SERV_003 – UT to UT 2.45 Kbps Voip 6-10 
  

			
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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 The table below lists the project milestones for the Transmitter Incremental Phase Modulator for the
Phase 1 Chipset. 
 TABLE 4-2A. INCREMENTAL PHASE MODULATOR FOR PHASE 1 PROJECT MILESTONES 

 

							
	 No.
	  	 Milestone Activity
	  	 Purpose
	  	 Date

				
	 1
	  	[***]	  	[***]	  	[***]
				
	 2
	  	[***]	  	[***]	  	[***]
				
	 3
	  	[***]	  	[***]	  	[***]

  

			
	Use or disclosure of the data contained on this sheet is subject to the 
restriction on the title page.	  	 Version 2.4

06/25/09
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38

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	  	AMENDMENT 4
	TerreStar Satellite Chipset SOW	  	 

  

 TABLE 4-3. SATELLITE CHIPSET PHASE 2 PROJECT MILESTONES 

 

							
	 No.
	  	 Milestone Activity
	  	 Purpose
	  	 Date

				
	 0
	  	[***]	  	[***]	  	[***]
				
	 1
	  	[***]	  	[***]	  	[***]
				
	 1a
	  	[***]	  	[***]	  	[***]
				
	 2.
	  	[***]	  	[***]	  	[***]
				
	 3
	  	[***]	  		  	[***]
				
	 4
	  	[***]	  	[***]	  	[***]
				
	 5
	  	[***]	  	[***]	  	[***]
				
	 6
	  	[***]	  	[***]	  	[***]
				
	 7
	  	[***]	  	[***]	  	[***]
				
	 8
	  	[***]	  	[***]	  	[***]
				
	 9
	  	[***]	  	[***]	  	[***]
				
	 10
	  	[***]	  	[***]	  	[***]

 The below table shows the project
milestones for the Oberon Integration Platform. 
 TABLE 4-3A. OBERON INTEGRATION PLATFORM PROJECT MILESTONES

  

							
	 No.
	  	 Milestone Activity
	  	 Purpose
	  	 Date

				
	 1
	  	[***]	  	[***]	  	[***]
				
	 2
	  	[***]	  	[***]	  	[***]
				
	 3
	  	[***]	  	[***]	  	[***]
				
	 4
	  	[***]	  	[***]	  	[***]
				
	 5
	  	[***]	  	[***]	  	[***]

  

 
 4.1 FULL REVENUE SERVICE 

The Chipset/S-BSS Release 1 Operational Readiness Review shall be held prior to the Start of Revenue Service (ref S-BSS SOW paragraph 3.1 ). The Key
Milestone, Provisional Acceptance, shall be not later than [***]. 
  

			
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06/25/09
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38Exhibit 10.4

 Exhibit 10.4 

Confidential treatment has been requested for portions of this exhibit and such portions have been filed separately with the Commission. The copy
filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	
 

	 	AMENDMENT 5

  

AMENDMENT 5 TO 

CONTRACT 

BETWEEN 

TERRESTAR NETWORKS INC. AND HUGHES NETWORK SYSTEMS, LLC 

FOR DESIGN, DEVELOPMENT AND SUPPLY OF 

SATELLITE BASE STATION SUBSYSTEM (S-BSS) 

This Amendment 5 to Contract (the “Amendment”) is made as of April 14, 2010 (the “Amendment
Effective Date” or “EDA”) by and between Hughes Network Systems, LLC (the “Contractor”) with its principal place of business at 11717 Exploration Lane, Germantown, Maryland, 20876, and TerreStar Networks
Inc., a corporation organized under the laws of Delaware with its principal place of business at One Discovery Square, Suite 600, 12010 Sunrise Valley Drive, Reston, Virginia 20190 (“TerreStar”). As used herein, Contractor and
TerreStar may each be referred to individually as a “Party” and collectively as the “Parties.” 

WHEREAS, TerreStar has contracted with Contractor for the design, development and supply of an S-BSS and related Deliverable Items
under the contract between the Parties titled “Contract Between TerreStar Networks Inc. and Contractor for Design, Development and Supply of Satellite Base Station Subsystem (S-BSS),” dated February 6, 2007, as amended by that certain
Addendum and Amendment to Contract between the Parties dated April 13, 2007, and as further amended by that second Amendment to Contract between the Parties dated August 1, 2008, the third Amendment to Contract between the Parties dated
March 9, 2009, and that fourth Amendment to Contract between the Parties dated July 15, 2009 (collectively the “Contract”); and 

WHEREAS, Contractor agrees to provide additional work under the Contract, including free of charge engineering development
services; and 
 WHEREAS, the Parties desire to amend the Contract as set forth herein. 

NOW, THEREFORE, in consideration of the mutual covenants and agreements contained herein and intending to be legally bound, the
Parties hereby agree to the following: 
 I. The Contract is hereby amended as follows: 

1. Additional Work. 
  

	 	(a)	 Contractor agrees to perform the engineering development work required to implement the ATT-QOS Workaround (Phase-1 and Phase-2), and to perform the
engineering development work to design an Optical RF Converter (“ORC”), with an option to purchase ORC 

 

			
	Appendix B to Exhibit B	  	Version 1.0
		  	03/03/2010
		  	Page 1 of 50

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	  	AMENDMENT 5
	  	

  
  

	 	
‘equipment at a reduced unit price, all in accordance with Exhibit A3 and Exhibit B3 respectively which are attached to this Amendment. For greater certainty, the engineering development
work associated with the ATT-QOS Workaround and ORC will be provided to TerreStar by Contractor free of charge. 

  

	 	(b)	As set forth in the attached Exhibit A4 (as further defined below), Contractor agrees to perform the engineering development work required to implement the S-BSS Test
Gateway feature for the GMR1-3G SBSS and Chipset (“Test Gateway Feature”) allowing Production UTs and Test UTs to be controlled so they can selectively ignore or connect to an S-BSS Test-Gateway or Production Gateway, in accordance with
the GMR1-3G Specification. 

 2. Deleted Exhibits. On the Amendment Effective Date the following Exhibits to the Contract
shall be deleted in their entirety and replaced with the revised versions of such Exhibits which are described in Article I-2 below and which are attached to this Amendment: 

 

	 	(a)	Exhibit C, Revision 5.2 – S-BSS Price and Payment Milestone Schedule 

  

	 	(b)	Exhibit D – Options, dated February 6, 2007 

3. Added Exhibits. On the Amendment Effective Date the following Exhibits to the Contract shall be added: 

 

	 	(a)	Exhibit A3, Revision 1.2 — Statement of Work for ATT-QOS Workaround and Optical RF Converter dated April 15, 2010. 

 

	 	(b)	Exhibit A4, Revision A.02 — 3G Satellite Base Station Sub-System (3G S-BSS) Test S-BSS Overview dated March 18, 2010. 

 

	 	(c)	Exhibit B3, Revision 1.0 — Functional Requirements including Appendix A: Functional Requirements for ATT-QOS Workaround Version 1.2 and Appendix B: Functional
Requirements for Optical RF Converter Version 1.0 

  

	 	(d)	Exhibit C, Revision 5.4 — S-BSS Price and Payment Milestone Schedule, dated April 16, 2010 

 

	 	(e)	Exhibit D — Revision 2.0 Options, Dated March 5, 2010 

All other Exhibits to the Contract shall remain in full force and effect, except to the extent the same are expressly amended herein.

 4. Test Gateway Feature Period of Performance: The schedule for the delivery of the Test Gateway Feature is approximately 6 weeks
after the Amendment Effective Date. Contractor will develop and deliver the Test Gateway Feature software for the S-BSS and the Phase-1 Chipset and integrate the Test Gateway software at NLV. 

 

			
	Appendix B to Exhibit B	  	Version 1.0
		  	03/03/2010
		  	Page 2 of 50

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	  	AMENDMENT 5
	  	

  
  

 5. Test Gateway Feature Price and Payment. Contractor will perform the work to develop and
deliver the Test Gateway Feature under this Amendment for a fixed price of $[***] ([***]). Contractor will invoice TerreStar as follows: 
  

	 	•	 	 Upon the Amendment Effective Date: $[***] 

  

	 	•	 	 Upon delivery of the Test Gateway Feature Deliverables: $[***] 

TerreStar shall pay each undisputed invoiced amount within thirty (30) days after TerreStar receives the invoice. 

6. Optical RF Converter Option – No Warranty. Notwithstanding anything to the contrary in the Contract, including Article 9 entitled Warranty
and Support, the Parties agree that the equipment provided under the ORC Option, if exercised by TerreStar, shall be provided by Contractor “as-is” and without any warranties of any kind, express or implied, including any warranty of
merchantability or fitness for a particular purpose. Contractor agrees to provide support to TerreStar for the ORC equipment on a time and material basis upon request from TerreStar. 

II. Capitalized terms shall have the meaning ascribed to them in the Contract, and the related Exhibits and Glossary attached to the Contract, as may be
amended by this Amendment. 
 III. This Amendment and the Contract together constitute the entire agreement and understanding between the
Parties in connection with the transactions hereby contemplated. This Amendment supersedes all previous agreements, arrangements and understandings between the Parties with regard to such transactions. Except as specifically amended in this
Amendment, the Contract remains in full force and effect, and is ratified and confirmed. 
 IN WITNESS WHEREOF, the parties hereto have
caused this Amendment to be executed by their duly authorized representatives as of the Amendment Effective Date. 
  

									
	ACCEPTED:	 		 	
			
	TERRESTAR NETWORKS INC.	 		 	HUGHES NETWORK SYSTEMS, LLC
					
	By:	 	  
	 		 	By:	 	  

  

			
	Appendix B to Exhibit B	  	Version 1.0
		  	03/03/2010
		  	Page 3 of 50

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	  	AMENDMENT 5
	  	

  
  

			
	Typed Name: Vincent Loiacono	 	Typed Name: Matthew Mohebbi
		
	Title: Chief Financial Officer	 	Title: Vice President
		
	Date: April 16, 2010	 	Date: April 21, 2010

  

			
	Appendix B to Exhibit B	  	Version 1.0
		  	03/03/2010
		  	Page 4 of 50

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	  	AMENDMENT 5
	  	

  
  

 Appendix B to Exhibit B3 

TerreStar Satellite Base Station Subsystem 

(S-BSS) 

Optical RF Converter Functional Requirements 

Hughes Doc. # H35516, Version
1.0.                                 March 3, 2010 

Hughes Network Systems, LLC 
 11717
Exploration Lane 
 Germantown, Maryland 20876 

TerreStar Networks, Inc. 
 One Discovery
Place 
 12010 Sunset Hills Road, 6th Floor 

Reston, Virginia 20190 
  

			
	Appendix B to Exhibit B	  	Version 1.0
		  	03/03/2010
		  	Page 5 of 50

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

This document contains data and information proprietary to Hughes Network Systems, LLC and TerreStar
Networks Inc. This data is being furnished pursuant to the provisions of the Contract between TerreStar Networks Inc. and Hughes Network Systems, LLC for the TerreStar Satellite Base Station Subsystem. Hughes Network Systems, LLC and TerreStar
Networks Inc. shall have the right to duplicate, use or disclose the data and information to the extent specified in the Contract. 

			
	Appendix B to Exhibit B	  	Version 1.0
		  	03/03/2010
		  	Page 6 of 50

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

 Revision History 

 

							
	 Date
	  	Version	  	 Description
	  	Author
	3/2/10	  	1.0	  	Initial Release	  	[***]

  

 These commodities, technology or software were exported from the United States in
accordance with 
 the Export Administration Regulations. Diversion contrary to U.S. law is prohibited. 

Use or disclosure subject to the provisions of Contract signed on 31 March, 2009. 

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

 TABLE OF CONTENTS 

 

					
	 SECTION
	  	PAGE
	1.0	  	INTRODUCTION	  	1-1
	1.1	  	 Purpose
	  	1-1
	1.2	  	 Overview
	  	1-1
	1.3	  	 RELEVANT DOCUMENTS
	  	1-1
	2.0	  	INTERFACES	  	1
	2.1	  	 Fiber interface to SBSS
	  	2
	2.2	  	 Analog interface
	  	2
	2.3	  	 10 MHz interface
	  	2
	2.4	  	 IF to Fiber Mapping
	  	2
	2.5	  	 Control Software
	  	2
	2.6	  	 Photograph of the ORC
	  	3

  

 ii 

HUGHES PROPRIETARY 

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

 LIST OF FIGURES 

 

					
	 FIGURE
	  	 	  	PAGE
			
	Figure 1-1.	  	[***]	  	1-1
	Figure 2-1.	  	[***]	  	1
	Figure 2-2.	  	[***]	  	2
	Figure 2-3.	  	[***]	  	3

  

 iii 

HUGHES PROPRIETARY 

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

 LIST OF TABLES 

 

					
	 TABLE
	  	 	  	PAGE
			
	Table 2-1.	  	Interfaces	  	1
	Table 2-2.	  	Port Definition/Capabilities	  	2

  

 iv 

HUGHES PROPRIETARY 

 Confidential treatment has been requested for portions of this exhibit and such portions have been filed
separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 

Hughes Optical to RF Converter for TerreStar 

(3/10) 
  

	1.	INTRODUCTION 

  

	 	1.1.	Purpose 

 This document provides an
overview of the external interfaces and main function of the Hughes Optical RF Converter (ORC) for TerreStar. 
  

	 	1.2.	Overview 

 The TerreStar ORC [***]

 [***] 
 Figure
1-1. [***] 
  

	1.3.	RELEVANT DOCUMENTS 

 The relevant document
is as follows: 
 [***] 
  

 1-1 

HUGHES PROPRIETARY 

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

 2.        INTERFACES 

Figure 2-1 shows the [***] 
 [***]

 Figure 2-1. [***] 

Table 2-1 is a list of [***]. 

Table 2-1. Interfaces 
  

							
	 Interface
	  	 Purpose
	  	 Qty
	  	 Connector
Type

	 [***]
	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]

  

			
	 Exhibit C
	  	Version 5.4
		  	04/16/2010
		  	Page 1 of 50

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

	2.1.	Fiber interface to SBSS 

 The Fiber
interface [***]. 
 Table 2-2. Port Definition/Capabilities 

 

					
	 Port Number
	  	 Capability
	  	LC Connector
	 [***]
	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]

 Figure 2-2 shows [***].

 [***] 
 Figure
2-2. [***] 
 The Fiber interface is [***] 
  

	2.2.	Analog interface 

 The Analog IF interface
[***] 
  

	2.3.	10 MHz interface 

 The 10 MHz Interface
[***]. 
  

	 	2.4.	IF to Fiber Mapping 

 Each fiber carries
[***] 
  

	 	2.5.	Control Software 

  

			
	Exhibit C	  	Version 5.4
		  	04/16/2010
		  	Page 2 of 50

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

 Control scripts are used [***] 

 

	 	2.6.	Photograph of the [***] 

 The below
picture is [***]. 
 Figure 2-3. [***] 

 

			
	Exhibit C	  	Version 5.4
		  	04/16/2010
		  	Page 3 of 50

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

 Exhibit C 

TerreStar Satellite Base Station Subsystem 

(S-BSS) 

Price and Payment Milestone Schedule 
  

			
	Hughes Doc. # H35516, Version 5.4.	 	April 16, 2010

  

			
	Hughes Network Systems, LLC	  	
	 11717 Exploration Lane
	  	
	 Germantown, Maryland 20876
	  	  

		
	TerreStar Networks, Inc.	  	
	 One Discovery Place
	  	
	 12010 Sunset Hills Road, 6th Floor
	  	
	 Reston, Virginia 20190
	  	  

		  	Vincent Loiacono, Chief Financial Officer

 This
document contains data and information proprietary to Hughes Network Systems, LLC and TerreStar Networks Inc. This data is being furnished pursuant to the provisions of the Contract between TerreStar Networks Inc. and Hughes Network Systems, LLC for
the TerreStar Satellite Base Station Subsystem. Hughes Network Systems, LLC and TerreStar Networks Inc. shall have the right to duplicate, use or disclose the data and information to the extent specified in the Contract. 

 

			
	Exhibit C	  	Version 5.4
		  	04/16/2010
		  	Page 4 of 50

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

 Revision History 

 

							
	 Date
	  	Version	  	 Description
	  	Author
	 2/6/07
	  	4.0	  	Initial Release and Contract Execution Copy	  	[***]
	 1/31/08
	  	4.1	  	Incorporate CCN #6	  	[***]
	 5/22/08
	  	4.2	  	Incorporate CN #	  	[***]
	 6/17/08
	  	4.3	  	Amend 2 Final Version	  	[***]
	 2/20/09
	  	5.0	  	Amend 3	  	[***]
	 6/18/09
	  	5.1	  	Amendment 4 (Including Satellite Launch July 8, 2010)	  	[***]
	 7/8/09
	  	5.2	  	Changed Milestone 13 to AP	  	[***]
	 3/2/10
	  	5.3	  	Added ORC and T&M Options	  	[***]
	 4/16/10
	  	5.4	  	Revised MS payment table to reflect Test Gateway Feature	  	[***]

  

			
	Exhibit C	  	Version 5.4
		  	04/16/2010
		  	Page 5 of 50

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

 TABLE OF CONTENTS 

 

					
	 SECTION
	  	PAGE
	 REVISION HISTORY
	  	2
	1.1	  	Purpose and Scope	  	5
	1.2	  	DOCUMENT Hierarchy	  	5
	2.0	  	PRICE SCHEDULE	  	6
	2.1	  	PRICE SCHEDULE	  	6
	2.1.1	  	 SBSS Baseline Price
	  	6
	2.1.2	  	 SBSS Options Prices
	  	7
			
	3.0	  	PAYMENT PLAN	  	9
	3.1	  	PAYMENT PLAN	  	9

  

			
	 Exhibit C
	  	Version 5.4
		  	04/16/2010
		  	Page 6 of 50

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

 LIST OF TABLES 

 

					
	 TABLE
	  	 	  	PAGE
			
	Table 1-1.	  	Document Hierarchy	  	5
	Table 2-1.	  	S-BSS Baseline Price	  	6
	Table 2-2.	  	[***]	  	7
	Table 2-3.	  	[***]	  	7
	Table 2-4.	  	[***]	  	8

  

			
	 Exhibit C
	  	Version 5.4
		  	04/16/2010
		  	Page 7 of 50

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

	 	1.1	Purpose and Scope 

 This Exhibit covers the Price
Schedule and Payment Plan for the work that will be performed by Hughes Network Systems, LLC (the Contractor) for the design, development, fabrication, implementation, integration, delivery, performance verification, and testing of the Satellite
Base Station Subsystem (S-BSS). 
  

	 	1.2	DOCUMENT Hierarchy 

 i
Table 2-1. Document Hierarchy 
  

					
	 No.
	  	 Document
	  	 Content

	1.	  	Contract	  	Terms and Conditions
	2.	  	Exhibit A	  	Statement of Work
	3.	  	Exhibit B	  	S-BSS Technical Specification
	4.	  	Exhibit C	  	Price Schedule
	5.	  	Exhibit D	  	Options

  

			
	 Exhibit C
	  	Version 5.4
		  	04/16/2010
		  	Page 2-8 of 50

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

 2.0 Price schedule 

2.1   PRICE SCHEDULE 

2.1.1   SBSS Baseline Price 

ii Table 2-1. S-BSS Baseline Price 

 

					
	 Item
	  	 Description
	  	 Price

	1	  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
		  	[***]	  	[***]
	2	  	[***]	  	[***]
			
	3	  	[***]	  	[***]
			
	4	  	[***]	  	[***]
			
	5	  	[***]	  	[***]
			
	6	  	[***]	  	[***]
			
	7	  	[***]	  	[***]
			
	8	  	[***]	  	[***]
			
	9	  	[***]	  	[***]
			
	10	  	[***]	  	[***]

  

			
	Exhibit D	  	#H35520
		  	March 5, 2010
		  	Page 9 of 50

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

					
			
	11	  	[***]	  	[***]
			
	12	  	[***]	  	[***]
			
	13	  	[***]	  	[***]
	14	  	[***]	  	[***]
	15	  	[***]	  	[***]
		  	TOTAL PURCHASE PRICE	  	 $
 46,245,767

 2.1.2   SBSS Options Prices 

iii Table 2-2. S-BSS Options 
  

					
	1	  	[***]	  	[***]
			
	2	  	[***]	  	[***]
			
	3	  	[***]	  	[***]
		  	    [***]	  	    [***]
		  	    [***]	  	    [***]
		  	    [***]	  	    [***]
	4	  	[***]	  	[***]
		  	    [***]	  	    [***]
	5	  	[***]	  	[***]
		  	    [***]	  	[***]
		  	    [***]	  	[***]

 The following options defined as O3M (Option to be
priced in 3 Months) in Table 2-6 of the Technical Specifications and schedule shall be priced at EDC + 3 months: 
  

			
	Exhibit D	  	#H35520
		  	March 5, 2010
		  	Page 10 of 50

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

 iv Table 2-3. [***] 

 

					
	1	  	[***]	  	[***]
			
	2	  	[***]	  	[***]
		  		  	    [***]
	3	  	[***]	  	[***]
			
	4	  	[***]	  	[***]
		  		  	    [***]
	5	  	[***]	  	[***]
			
	6	  	[***]	  	[***]

 [***] 

v Table 2-4. [***] 
  

					
	1	  	[***]	  	[***]
			
	2	  	[***]	  	[***]
			
	3	  	[***]	  	[***]

  

			
	Exhibit D	  	#H35520
		  	March 5, 2010
		  	Page 11 of 50

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

 3.0 PAYMENT PLAN 

3.1   PAYMENT PLAN 
  

									
	 Number
	  	 Payment Milestone
	  	Value	 	Approximate
Date	 	Estimated
Calendar Date
	1	  	[***]	  	[***]	 	[***]	 	[***]
					
	2	  	[***]	  	[***]	 	[***]	 	[***]
					
	3	  	[***]	  	[***]	 	[***]	 	[***]
					
	4	  	[***]	  	[***]	 	[***]	 	[***]
					
	5	  	[***]	  	[***]	 	[***]	 	[***]
					
	6	  	[***]	  	[***]	 	[***]	 	[***]
					
	7	  	[***]	  	[***]	 	[***]	 	[***]
					
	8a	  	[***]	  	[***]	 	[***]	 	[***]
					
	8b	  	[***]	  	[***]	 	[***]	 	[***]
					
	9a	  	[***]	  	[***]	 	[***]	 	[***]
					
	9b	  	[***]	  	[***]	 	[***]	 	[***]
					
	9c	  	[***]	  	[***]	 	[***]	 	[***]
					
	10a	  	[***]	  	[***]	 	[***]	 	[***]
					
	10b	  	[***]	  	[***]	 	[***]	 	[***]
					
	10c	  	[***]	  	[***]	 	[***]	 	[***]
					
	11	  	[***]	  	[***]	 	[***]	 	[***]
					
	12a	  	[***]	  	[***]	 	[***]	 	[***]
					
	12b	  	[***]	  	[***]	 	[***]	 	[***]
					
	12c	  	[***]	  	[***]	 	[***]	 	[***]

  

			
	Exhibit D	  	#H35520
		  	March 5, 2010
		  	Page 12 of 50

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

									
	12d	  	[***]	  	[***]	 	[***]	 	[***]
					
	12e	  	[***]	  	[***]	 	[***]	 	[***]
					
	12f	  	[***]	  	[***]	 	[***]	 	[***]
					
	13	  	[***]	  	[***]	 	[***]	 	[***]
					
	14	  	[***]	  	[***]	 	[***]	 	[***]
					
		  	Total	  	46,245,767	 		 	

  

			
	Exhibit D	  	#H35520
		  	March 5, 2010
		  	Page 13 of 50

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

 Exhibit D 

TerreStar Satellite Base Station Subsystem 

(S-BSS) 

Options 
  

					
	 Hughes Doc. # H35520
	  	Revision 2.0    March 5, 2010

  

			
	Hughes Network Systems, LLC	 	
	11717 Exploration Lane	 	
	Germantown, Maryland 20876	 	  

		
	TerreStar Networks, Inc.	 	
	One Discovery Place	 	
	12010 Sunset Hills Road, 6th Floor	 	
	Reston, Virginia 20190	 	  

		 	Vincent Loiacono, Chief Financial Officer, April 16, 2010

  

	
	 This document contains data and information proprietary to
TerreStar Networks Inc. and Hughes Network Systems, LLC. This data is being furnished pursuant to the provisions of the Contract between TerreStar Networks Inc. and Hughes Network Systems, LLC for the TerreStar Satellite Base Station Subsystem.
Hughes Network Systems, LLC and TerreStar Networks Inc. shall have the right to duplicate, use or disclose the data and information to the extent specified in the Contract and herein.

 
 Information included in this Exhibit may contain technical data
controlled by the Export Administration Regulations (“EAR”) and/or the International Traffic in Arms Regulations (“ITAR”). This document has not been cleared for export or transfer to a Foreign Person or foreign
entity.

  

			
	Exhibit D	  	#H35520
		  	March 5, 2010
		  	Page 14 of 50

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

 TABLE OF CONTENTS 

 

					
	 SECTION
	 	 	  	PAGE
	 1.0
	 	INTRODUCTION	  	17
	 1.1
	 	purpose and scope	  	17
	 1.2
	 	reference documents	  	17
	 2.0
	 	OPTIONS	  	1
	 2.1
	 	general terms for options	  	1
	 2.2
	 	List of Options	  	1

  

			
	Exhibit D	  	#H35520
		  	March 5, 2010
		  	Page 15 of 50

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

 LIST OF TABLES 

 

					
	 TABLE
	 	 	  	PAGE
	 Table 1-1.
	 	Document Hierarchy	  	17

  

			
	Exhibit D	  	#H35520
		  	March 5, 2010
		  	Page 16 of 50

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

 1. Introduction 

 

	1.1.	purpose and scope 

 This document is
Exhibit D and defines the Options that can be procured by the Customer under the Satellite Base Station System Contract. 
  

	1.2.	reference documents 

Table 1-1. Document Hierarchy 
  

					
	 No.
	  	 Document
	  	 Content

			
	 1.
	  	Contract	  	Terms and Conditions
			
	 2.
	  	Exhibit A	  	Statement of Work
			
	 3.
	  	Exhibit B	  	S-BSS Technical Specification
			
	 4.
	  	Exhibit C	  	Price Schedule
			
	 5.
	  	Exhibit D	  	Options

  

			
	Exhibit D	  	#H35520
		  	March 5, 2010
		  	Page 17 of 50

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	  	AMENDMENT 5
	  	

  
  

 2. Options 

 

	2.1.	general terms for options 

  

	 	1.	The Customer may exercise any of the options described in Subsection 2.2 below (the “Options”) at any time before the date specified in the relevant
Option. The exercise of the Option shall be effective and irrevocable upon delivery by Customer to Contractor of a written notice referencing such Option and stating that the Customer is exercising that Option. Subject to the foregoing, the Customer
may exercise as many of the Options listed in Subsection 2.2 as it may elect. 

  

	2.2.	List of Options 

  

	 	1.	Exhibit C, Table 2-2, Item # 1 – [***] 

[***] 
  

	 	2.	Exhibit C, Table 2-2, Item # 2 – [***] 

[***] 
  

	 	3.	Exhibit C, Table 2-2, Item # 3 – [***] 

[***] 
  

	 	4.	Exhibit C, Table 2-2, Item # 4 – [***] 

[***] 
  

	 	5.	Exhibit C, Table 2-2, Item # 5 – [***] 

[***] 
  

	 	6.	The following options defined as [***] 

[***] 
  

	 	7.	The following options defined as [***] 

[***] 
  

			
	Exhibit A3	  	Version 1.2
		  	04/15/2010
		  	Page 1 of 50

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

 Exhibit A3 

TerreStar Satellite Base Station Subsystem 

(S-BSS) 

Statement of Work for [***]-QoS Workaround and Optical RF Receiver 

 

			
	 Hughes Doc. # H35516, Version 1.2.
	 	April 15, 2010                

Hughes Network Systems, LLC 
 11717
Exploration Lane 
 Germantown, Maryland 20876 

TerreStar Networks, Inc. 
 One Discovery
Place 
 12010 Sunset Hills Road, 6th Floor 

Reston, Virginia 20190 

 

This document contains data and information proprietary to Hughes Network Systems, LLC and TerreStar
Networks Inc. This data is being furnished pursuant to the provisions of the Contract between TerreStar Networks Inc. and Hughes Network Systems, LLC for the TerreStar Satellite Base Station Subsystem. Hughes Network Systems, LLC and TerreStar
Networks Inc. shall have the right to duplicate, use or disclose the data and information to the extent specified in the Contract. 

			
	Exhibit A3	  	Version 1.2
		  	04/15/2010
		  	Page 2 of 50

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

 Revision History 

 

							
	 Date
	  	 Version
	  	 Description
	  	 Author

	 3/3/10
	  	1.0	  	Initial Release	  	[***]
	 3/30/10
	  	1.1	  	Initial Release	  	[***]
	 4/15/10
	  	1.2	  	Updates for Phase 2	  	[***]

  

			
	Exhibit A3	  	Version 1.2
		  	04/15/2010
		  	Page 3 of 50

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

 Table of Contents 

 

					
	 1
	  	INTRODUCTION	  	4
	 1.1
	  	 Purpose and Objective
	  	
	 1.2
	  	 Scope
	  	

  

			
	Exhibit A3	  	Version 1.2
		  	04/15/2010
		  	Page 4 of 50

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  

	1	Statement of Work 

  

 

	1.1	Purpose and Objective 

 This
statement of work (SOW) defines work for 2 items 
  

	 	1)	[***]-QoS Workaround, [***] 

  

	 	2)	Optical RF Converter 

  

 

	1.2	Scope 

 The scope of these 2
items is as follows. 
 [***]-QoS Workaround 

Contractor shall develop the enhancements to the software for the satellite base station subsystem (S-BSS) to support [***] 

This work shall comply with the specification in Exhibit B3, Appendix A. 

This work will take place in 2 phases. [***]. 

[***] 

Optical RF Converter 

Contractor shall develop the enhancements to the [***] 
  

 

	1.3	Schedule 

 [***] 

[***] 
  

 This Amendment and the information contained therein are confidential and proprietary to
TerreStar and Contractor and shall not 
 be published or disclosed to any third party except as permitted by the Terms and
Conditions of this Amendment and the Contract. 

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

 Exhibit B3 

TerreStar Satellite Base Station Subsystem 

(S-BSS) 

Functional Requirements for 

[***]-QoS Workaround and Optical RF Receiver 

Version
1.0.                    March 3, 2010 

Hughes Network Systems, LLC 
 11717
Exploration Lane 
 Germantown, Maryland 20876 

TerreStar Networks, Inc. 
 One Discovery
Place 
 12010 Sunset Hills Road, 6th Floor 

Reston, Virginia 20190 

 

This document contains data and information proprietary to Hughes Network Systems, LLC and TerreStar
Networks Inc. This data is being furnished pursuant to the provisions of the Contract between TerreStar Networks Inc. and Hughes Network Systems, LLC for the TerreStar Satellite Base Station Subsystem. Hughes Network Systems, LLC and TerreStar
Networks Inc. shall have the right to duplicate, use or disclose the data and information to the extent specified in the Contract. 

			
	Exhibit B3	  	Version 1.0
		  	03/03/2010
		  	Page 1 of 50

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

 Revision History 

 

							
	 Date
	  	 Version
	  	 Description
	  	 Author

	 3/3/10
	  	1.0	  	Initial Release	  	[***]

  

			
	Exhibit B3	  	Version 1.0
		  	03/03/2010
		  	Page 2 of 50

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filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

 Table of Contents 

 

					
	 1
	  	INTRODUCTION	  	4
	 1.1
	  	 Purpose and Objective
	  	
	 1.2
	  	 Scope
	  	

  

			
	Exhibit B3	  	Version 1.0
		  	03/03/2010
		  	Page 3 of 50

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

	1	Specifications 

  

 

	1.1	Purpose 

 This exhibit contains
the functional requirements for the below 2 items 
 1) [***]-QoS Workaround[***] 

2) Optical RF Converter 
  

 

	1.2	Specification 

 Attached to this document are the
following Appendices: 
 Appendix A to Exhibit B3: Functional Requirements for [***]-QoS Workaround 

Appendix B to Exhibit B3: Functional Requirements for Optical RF Converter 

 

 i 

HUGHES PROPRIETARY 

 Confidential treatment has been requested for portions of this exhibit and such portions have been filed
separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 

Test S-BSS Overview 

H42660 RevA.02 

 

 

 H42660 

Exhibit A4 - 3G SATELLITE BASE STATION SUB-SYSTEM (3G S-BSS) 

Test S-BSS OVERVIEW 

Revision A.02 

03/18/2010 
  

 ii 

HUGHES PROPRIETARY 

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 

Test S-BSS Overview 

H42660 RevA.02 
  

 PROPRIETARY NOTICE 

All rights reserved. This publication and its contents are proprietary to Hughes Network Systems, LLC. No part of this publication may be
reproduced in any form or by any means without the written permission of Hughes Network Systems, LLC, 11717 Exploration Lane, Germantown, Maryland 20876. 

HUGHES is a registered trademark of Hughes Network Systems, LLC. All other trademarks are the property of their respective owners.

 Copyright 2010 Hughes Network Systems, LLC 

 

 

  

 iii 

HUGHES PROPRIETARY 

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 

Test S-BSS Overview 

H42660 RevA.02 
  

 REVISION HISTORY 

 

							
	 Revision
	 	 Date of Issue
	 	 Author
	 	 Scope

	A.01	 	03/04/2010	 	HNS	 	Creation
	A.02	 	03/18/2010	 	HNS	 	[***]

  

 iv 

HUGHES PROPRIETARY 

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 

Test S-BSS Overview 

H42660 RevA.02 
  

 Table of Contents 

 

					
	 1
	  	PURPOSE	  	7
	 1.1
	  	 Definitions and Acronyms
	  	7
	 2
	  	TEST S-BSS	  	8
	 2.1
	  	 Overview
	  	8
	 2.2
	  	 Specification
	  	8
	 2.3
	  	 Configuration
	  	8
	 2.4
	  	 Operation
	  	8
	 2.5
	  	 Test S-BSS Operational Scenario
	  	9
	 2.5.1
	  	 Preconditions
	  	9
	 2.5.2
	  	 Scenario Description
	  	9

  

 v 

HUGHES PROPRIETARY 

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 

Test S-BSS Overview 

H42660 RevA.02 
  

 List of Tables 

 

					
	 Table 2-1
	  	[***]	  	8
	 Table 2-2
	  	[***]	  	8
	 Table 2-3
	  	[***]	  	10
	 Table 2-4
	  	[***]	  	10

  

 vi 

HUGHES PROPRIETARY 

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
		  	Test S-BSS Overview
	  	H42660 RevA.02

  

	1.	Purpose 

 This document describes test
mode functionality in the S-BSS. The intent of the document is to provide a system level view of a Test S-BSS and the parameters that are used to configure a S-BSS to put it in test mode. 

 

	1.1.	Definitions and Acronyms 

  

			
	 Acronym
	  	 Meaning

	 S-BSS
	  	Satellite Base Station Subsystem
	 UT
	  	User Terminal
	 BCCH
	  	Broadcast Control Channel
	 EMS
	  	Element Management System

  

 7 

HUGHES PROPRIETARY 

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 

Test S-BSS Overview 

H42660 RevA.02 
  

	2.	Test S-BSS 

  

	2.1.	Overview 

 In case there are [***].

  

	2.2.	Specification 

 The concept of [***].

  

							
	i     Table 2-1 [***]
				
	 [***]
	  	[***]	 	[***]	 	[***]
				
	 [***]
	  	[***]	 	[***]	 	[***]
	  	 	[***]	 	[***]
				
	 [***]
	  	[***]	 	[***]	 	[***]
	  	 	[***]	 	[***]
				
	 [***]
	  	[***]	 	[***]	 	[***]
	  	 	[***]	 	[***]
				
	 [***]
	  	[***]	 	[***]	 	[***]
	  	 	[***]	 	[***]

  

	2.3.	Configuration 

  

	 	•	 	 [***] 

Note that the 2nd option is [***] 
  

	 	•	 	 S-BSS Configuration : For test mode operation [***] 

 

	 	•	 	 Note that this mode is [***] 

Note that in the current S-BSS software release [***]. 

It is to be noted that [***] 
  

	2.4.	Operation 

 In a cell [***] 

i    Table 2-2 [***] 
  

									
	 [***]
	  	[***]	  	[***]	 	[***]	 	[***]
	 [***]
	  	[***]	  	[***]	 	[***]	 	[***]

  

 8 

HUGHES PROPRIETARY 

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 

Test S-BSS Overview 

H42660 RevA.02 
  

									
		  	[***]	  	[***]	  	[***]	  	[***]
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]
	  	[***]	  	[***]	  	[***]	  	[***]
	  	[***]	  	[***]	  	[***]	  	[***]

 Note 1: The
current implementation [***] 
 Note 2: Similarly with the [***] 

 

	2.5.	Test S-BSS Operational Scenario 

 Test
S-BSS and Normal S-BSS [***] 
 [***] 

2.5.1   Preconditions 

This operational scenario [***] 

[***] 

2.5.2   Scenario Description 

[***] 
  

 9 

HUGHES PROPRIETARY 

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 

Test S-BSS Overview 

H42660 RevA.02 
  

 Refer to the table below [***] 

i    Table 2-3 [***] 
  

									
	 [***]
	  	 [***]
	  	 [***]
	  	 [***]
	  	 [***]

					
	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	  	  	  	[***]	  	[***]
	  	[***]	  	[***]	  	[***]	  	[***]
	  	  	  	[***]	  	[***]
	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	  	  	  	[***]	  	[***]
	  	[***]	  	[***]	  	[***]	  	[***]
	  	  	  	[***]	  	[***]

 Refer to the table below [***]

 ii    Table 2-4 [***] 
  

									
					
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]
					
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]
	  	[***]	  	[***]	  	[***]	  	[***]
					
	 [***]
	  	[***]	  	[***]	  	[***]	  	[***]
	  	[***]	  	[***]	  	[***]	  	[***]
	  	[***]	  	[***]	  	[***]	  	[***]TR

  

 10 

HUGHES PROPRIETARY 

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

 Appendix A to Exhibit B3 

TerreStar Satellite Base Station Subsystem 

(S-BSS) 

[***]-QOS Workaround Functional Requirements 
  

			
	Hughes Doc. # H35516, Version 1.2.	 	April 5, 2010

 Hughes Network
Systems, LLC 
 11717 Exploration Lane 

Germantown, Maryland 20876 
 TerreStar
Networks, Inc. 
 One Discovery Place 

12010 Sunset Hills Road, 6th Floor 
 Reston,
Virginia 20190 
  

This document contains data and information proprietary to Hughes Network Systems, LLC and TerreStar
Networks Inc. This data is being furnished pursuant to the provisions of the Contract between TerreStar Networks Inc. and Hughes Network Systems, LLC for the TerreStar Satellite Base Station Subsystem. Hughes Network Systems, LLC and TerreStar
Networks Inc. shall have the right to duplicate, use or disclose the data and information to the extent specified in the Contract. 

			
	Exhibit B3	  	Version 1.2
		  	04/05/2010
		  	Page 1 of 50

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

 Revision History 

 

							
	 Date
	  	Version	  	 Description
	  	 Author

	3/2/10	  	1.0	  	Initial Release	  	[***]
	3/18/10	  	1.1	  	Initial Release	  	[***]
	4/05/10	  	1.2	  	Update for EMS statistics	  	[***]

  

			
	Exhibit B3	  	Version 1.2
		  	04/05/2010
		  	Page 2 of 50

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

 Contents 
  

					
	 REVISION HISTORY
	  	I
	1.0	  	OVERVIEW	  	4
	2.0	  	Requirements	  	4

  

			
	Exhibit B3	  	Version 1.2
		  	04/05/2010
		  	Page 3 of 50

 Confidential treatment has been requested for portions of this exhibit and such portions have been
filed separately with the Commission. The copy filed herewith omits the information for which confidential treatment has been requested and replaces it with [***]. 
  

			
	

	  	AMENDMENT 5
	  	

  
  

 1.0 OVERVIEW 

The SBSS shall support the [***]-QOS workaround in 2 phases. 

[***]. 
 2.0 REQUIREMENTS

 The technical requirements are specified in the TerreStar document APN Issues Draft 0.3 23 February, 2010 with the modifications
contained within section 3.3.2 and listed below: 
  

	 	1.	Addition of a new (second) [***] 

  

	 	2.	Enable (or disable) use of the [***] 

  

	 	3.	Enable the configuration of [***] 

  

	 	4.	The [***] 

  

	 	5.	The [***] 

  

			
	Exhibit B3	  	Version 1.2
		  	04/05/2010
		  	Page 4 of 50

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