Document:

Fifteenth Amendment

 Exhibit 10.23H 
 Pages where confidential treatment has been requested are stamped “Confidential Treatment Requested and 
 the Redacted Material has been separately filed with the Commission,” and places where information has 
 been redacted have been marked with (***). 
 FIFTEENTH AMENDMENT

 TO THE 
 CSG MaSTER SUBSCRIBER MANAGEMENT SYSTEM AGREEMENT 
 BETWEEN

 CSG SYSTEMS, INC. 
 AND 
 DISH NETWORK, L.L.C. 

THIS FIFTEENTH AMENDMENT (this “Amendment”) is made by and between CSG Systems, Inc., a Delaware corporation
(“CSG”), and DISH Network L.L.C., a Colorado limited liability company (“Customer”). This amendment shall be effective as of the date last signed below (the “Effective Date”). CSG and Customer
entered into a certain CSG Master Subscriber Management System Agreement (Document #2301656) effective as of January 1, 2010 (the “Agreement”), and now desire to further amend the Agreement in accordance with the terms and
conditions set forth in this Amendment. If the terms and conditions set forth in this Amendment shall be in conflict with the Agreement, the terms and conditions of this Amendment shall control. Any terms in initial capital letters or all capital
letters used as a defined term but not defined in this Amendment shall have the meaning set forth in the Agreement. Upon execution of this Amendment by the parties, any subsequent reference to the Agreement between the parties shall mean the
Agreement as amended by this Amendment. Except as amended by this Amendment, the terms and conditions set forth in the Agreement shall continue in full force and effect according to their terms. 

CSG and Customer agree as follows as of the Effective Date: 
  

	1.	Customer desires to purchase and CSG desires to provide CSG’s Interactivate product (“Interactivate”) for the purpose of assisting and
streamlining Customer’s process for the prequalification and provisioning of subscriber data service sold through Customer’s partner channels and, as a result, Exhibit B-1(a) entitled “CSG Product Description” shall be amended to
add the following: 

 Interactivate. Interactivate, utilized in CSG’s managed services environment,
provides real-time, bi-directional, transaction processing and event management. Interactivate provides the link between subscribers and services, enabling customers to launch new services and streamline processes. 

At the core of the Product are adapters that enable communication with upstream business systems and downstream systems. The work-flow
engine with its graphical user interface and drag-and-drop capabilities allows for implementation of specific business rules. 
  

	2.	Schedule F, Fees, CSG Licensed Products, of the Agreement shall be amended to add a new Section III. entitled “CSG’s Interactivate,” as
follows: 

 CSG Licensed Products 

III. CSG’s Interactivate 
  

					
	 Description of Item/Unit of Measure
	  	 Frequency
	  	 Fee

	 1.    Implementation and Configuration (**** *)
	  	*** *******	  	*****
			
	 2.    Initial Managed Services Support Fees (**** *) (**** *)
	  		  	
	 a.    Initial Fee
	  	***-****	  	****,***
	 b.    ** ** ***,*** ************ *** *****
	  	*******	  	***,***
			
	 3.    Incremental Managed Services Support Fees (**** *) (**** *)
	  		  	
	 a.    ** ****** ** ***,*** ***     **** **** ** ***** ** ***,*** ************ (***
***********)
	  	*******	  	**.****
	 b.    ** ****** ** ***,*** *** **** **** ** ***** ** ***,*** ************ (***
    ***********)
	  	*******	  	**.****
	 c.    ***,*** ** *,***,*** ************ (*** ***********)
	  	*******	  	**.****
	 d.    ********** ******** (**** *)
	  	*** *******	  	**** + *** ******
			
	 4.     Additional Partner Interfaces (**** *)
	  		  	
	 a.    ******* (*** ******* *********)
	  	*** *******	  	***,***.**
	 b.    *********** *** ******* (*** ******* *********)
	  	*******	  	**,***.**

			
	***	  	 Confidential Treatment Requested and the Redacted Material has been separately filed with the

Commission.

  

 Note 1: Implementation and Configuration. All implementation and configuration
services and the associated fees shall be set forth in a mutually agreed upon statement(s) of work. Reimbursable Expenses are additional. 
 **** *: ******* ******* ******** ******* ****. *** ***-**** *** ***** ******* ********* ******* ******* ******** ******* **** ***** ** ******** ** ******** **** ***** * ********** ******* ****, ** ****
**** ** ********** ** *** ********* ** ****, *** ******** **. *******, ******* *** *** ******** (*** “***”). *** ******** *** ********* *** ** ** ***,*** ************ *** ***** ** ***’* ******* ******** ***********: 

 

	 	•	 	 ************* ********, *********** *** *******, *********, ******* **********, * ******* ** *** ************* ** ***’* ******* ********
*********** ****** *** **** *** *** ********** ************* ********** **** **** ******** *** ***** ** *** ******. 

  

	 	•	 	 *********** *********** *** ******* (******** *******/******* ******** *** **** *** ****) 

 

	 	•	 	 *********** *** ******* *** *** (*) *** ********** *********, *** (*) *** ******** *********, *** (*) ******** ********** *******
********** **********, *** (*) ******** ********** ******* ******** **********. *** ********-********** ******* ********** ***** ** ******** ******** ** * ********** ********** ******** ****** **** ********* ** **** *** **** ** ******* ** ****
***** **** **** *** ********* *** ***** ***********. 

  

	 	•	 	 *** ******* ***** ** * ******-*** (**) ***** ********** *** ************* ** ** **** ** ***** ******* ************ ** ** **** **** ***,*** ****
*** ******-*** (**) ***** **** (*** ******** ** **** ********* *** *** *** *** “****”), ******* ** ****** ***** ********** ** ******** ** ******* * ** *** *********. ** *** ***** ******** ********** *** *** ** ************* ***** **
*** *** ** *** ****, *** ******* ***** **** ** ******** ******** ** ******* ** (*), ** (*) ** ** (*) ******** ****** **** ** ******** ** *** ***** ******* *** *** ***** ** *** ***** *** *********, ******** ***** *** *** ******* ***********
****** ** ***,*** ********** ** *** ********* ****** ** *** ******-*** (**) ***** ******* **********. ** ******** ** *** *********, ******** ***, ** *** **** ******, **** ****** ** ***, ****** *** **** *** ** ** *** (*) ********** ***
(*) **** ********** ******* (**** ** “********** ************* ********** ****”) **** *** **** ***** ******** ******. ** *** ***** ******** ********** *** *** ** ************* ***** ** *** *** ** ****** ********** *************
********** ****, *** ******* ***** **** ** ******** ******** ** ******* ** (*), ** (*) ** ** (*) , ******** ****** **** ** ******** ** *** ***** ******* *** *** ***** ** *** ***** *** *********, ******** ***** *** *** ******* ***********
****** ** ***,*** ********** ** *** ********* ****** ** *** **** ******* ********** ************* ********** ****.  

 **** *: *********** ******* ******** ******* ****. *** *********** ******* ******** ******* **** ***** ** ** ******** ** *** ******* ******* ******** ******* *** *** *** ******** *** ** *********
*********** ******* ***** *** ******** ** *** ******* ******* ******** *********** ** ***,*** ************ *** ***** (*** “******* ******** ***********”). ** ************* ** *** *********** ******* ******** ******* ****, *** ***** *******
*** *********: 
  

	 	•	 	 * ******* ** *** ************* ******** ** ***’* ******* ******** *********** ****** *** **** (*********, ******* **********, *** **********
************* ********** ****), ** **** ** ***’* *********** *** ******* ********. 

  

	 	•	 	 *********** *********** *** ******* (******** *** *********** ** ********** ******** *** *** ***** ******** ********* ** ******* ***
***********– *** **** * *****). 

  

	 	•	 	 ** * ***** ** *************, *** *********** ***** *** ***** ** *** ***** ***** ***** **** ******* *** ******** ** ** **********. ** ** *******, **
******** *** ***,*** ************ ** *** ***** *****, *** *** *** *** ***,*** ************ ***** *** ******** ** *** ******* ******* ******** *********** ** ***,*** ************, ***** ** ** *** **** ** **.** *** ***********.

 **** *: ************ *** ********* ** ******** ******** **** ********** *******, *** ********
******* *********** ** ********** ******* ********* *** ******** ********** (******** ************** ********). ** *** ***** *** *********** ****** ******* *,***,*** *** *** *** *********** ******, *** ******* ***** ** ********* ** **** ***** ****
*** *** **** ****. 
 **** *: ********** ********. ******** ****** **** ********** **** *** ** ********* ********
*********** ***** ** ********** ****** ******** ****** *** ******* ******** *********** *** ******** ***** ** *********** *** *** ******* ** ***** **** ** ********** ** **** ********. 

**** *: ********** ******* **********. *** ******* ** ********** ** *** ******* ********** ***** ** *** ***** ** ******** ****** ****
************ ** ****. 
 All fees provided herein are subject to annual adjustment as provided in Section 4 of the
Agreement. 
  

	3.	CSG will provide the necessary environments to migrate CSG’s Interactive to ACP. 

 

	4.	******** ******** *** *** ****** **** *** ******* ******* ******** ******* *** ** ****,*** *** *** ******* *** ** ***,*** *** *************, ***** ** ***********
******* *** **,***,*** ****** ******** ** *** ** ******** ***** *** ***** ********* ** *** ********* (*** ******** **. *******) ***** ************. 

  

	5.	Effective ****** (**) **** ***** the Completion Date of the SOW, Schedule H, entitled “CSG Systems, Inc. Business Continuity/Disaster Recovery Plan” of
the Agreement, is hereby amended to include Interactivate as a MARC I product. 

			
	***	  	 Confidential Treatment Requested and the Redacted Material has been separately filed with the

Commission.

  

	6.	The parties agree that after ****** (**) **** of the completion of the Phase I ********** Release Date (as defined in the SOW), the parties shall meet to discuss
performance of Interactivate, as well as identify and come to mutual written agreement for commercially reasonable *********** ******* ** ******* (*.*. ********* ***** **********). 

IN WITNESS WHEREOF the parties hereto have caused this Amendment to be executed by their duly authorized representatives. 

 

									
	DISH NETWORK L.L.C.	 		 	CSG SYSTEMS, INC.
					
	By:	 	 /s/ Michael K. McClaskey
	 		 	By:	 	 /s/ Joe Ruble

	Name:	 	Michael K. McClaskey	 		 	Name:	 	Joe Ruble
	Title:	 	 Senior Vice President and Chief Information
 Officer
	 		 	Title:	 	EVP-General Counsel
	Date:	 	9/23/11	 		 	Date:	 	9/23/11Second Supplemental Indenture

 Exhibit 4.1 
 SECOND SUPPLEMENTAL INDENTURE 
 Dated as of July 21, 2011 

THIS SECOND SUPPLEMENTAL INDENTURE to the Indenture referred to below is dated as of July 21, 2011 (this “Second Supplemental
Indenture”) between AMEREN ILLINOIS COMPANY, an Illinois corporation (the “Company”), and THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A. (formerly The Bank of New York Trust Company, N.A.) (the “Trustee”). 

Central Illinois Light Company (“CILCO”) and the Trustee executed an Indenture, dated as of June 1, 2006 (as supplemented
and amended, the “Indenture”), providing, among other things, for the issuance from time to time of CILCO’s Notes. 
 $54,000,000 aggregate principal amount of CILCO’s 6.20% Senior Secured Notes due 2016 and $42,000,000 aggregate principal amount of CILCO’s 6.70% Senior Secured Notes due 2036 were authenticated
and delivered pursuant to the Company Order dated June 14, 2006 and remain outstanding as of the date hereof. 

$150,000,000 aggregate principal amount of CILCO’s 8.875% Senior Notes due 2013 were authenticated and delivered pursuant to the
Company Order dated December 9, 2008 and remain outstanding as of the date hereof. 
 On October 1, 2010, CILCO and
Illinois Power Company were merged into the Company whereby the Company was the surviving corporation. The Indenture was supplemented by the First Supplemental Indenture, dated as of October 1, 2010, pursuant to which the Company, among other
things, assumed the obligations of CILCO under the Indenture and the Notes and was substituted for CILCO under the Indenture. 

Pursuant to Section 13.01 of the Indenture, the Company, when authorized by Board Resolution, and the Trustee may enter into an
indenture supplemental to the Indenture for one or more of the purposes set forth in such Section 13.01 without the consent of the Holders of any of the Notes at the time outstanding, including to make such provision in regard to matters or
questions arising under the Indenture as may be necessary or desirable, and not inconsistent with the Indenture or prejudicial to the interests of the holders in any material respect, for the purpose of supplying any omission, curing any ambiguity,
or curing, correcting or supplementing any defective or inconsistent provision. 
 The Company has directed the Trustee to
execute and deliver this Second Supplemental Indenture in accordance with the terms of the Indenture. 
 All things necessary to
make this Second Supplemental Indenture the legal, valid and binding obligation of the Company have been done. 
 In
consideration of the foregoing premises, the parties mutually agree as follows for the benefit of each other and for the equal and ratable benefit of the Holders of the Notes: 
 ARTICLE I 
 DEFINITIONS 

Section 1.1 Definitions. Except as otherwise defined herein, capitalized terms defined in the Indenture are used herein
as therein defined. 

 ARTICLE II 
 AMENDMENT TO INDENTURE 
 Section 2.1 Amendments to
Section 6.07(a) of the Indenture. On and after the date hereof, Section 6.07(a) of the Indenture shall be amended (A) by adding the following parenthetical at the end of clause (ii) of such section: “(which Liens may
extend to Operating Property acquired, constructed, developed, repaired, altered or improved after such merger, consolidation, sale, lease or disposition if required by the terms of the mortgage, security agreement or other instrument creating such
Lien; provided that such Liens may not extend to Operating Property owned by the Company immediately prior to such merger, consolidation, sale, lease or disposition)”; and (B) by adding the following parenthetical after the words “for
any such purpose” in clause (iii) of such section: “(including the costs of incurring such Debt)”. 

Section 2.2 Receipt by Trustee. In accordance with Section 13.05 of the Indenture, the parties acknowledge that the
Trustee has received an Officers’ Certificate and an Opinion of Counsel as conclusive evidence that this Second Supplemental Indenture complies with the requirements of Article XIII of the Indenture. 

ARTICLE III 

MISCELLANEOUS 
 Section 3.1 Parties. Nothing expressed or mentioned herein is intended or shall be construed to give any Person, other than the Holders and the Trustee, any legal or equitable right,
remedy or claim under or in respect of this Second Supplemental Indenture or the Indenture or any provision herein or therein contained. 
 Section 3.2 Governing Law. This Second Supplemental Indenture shall be governed by and deemed to be a contract under, and construed in accordance with, the laws of the State of New York,
and for all purposes shall be construed in accordance with the laws of said State without regard to conflicts of law principles thereof. 
 Section 3.3 Ratification of Indenture; Second Supplemental Indenture Part of Indenture. Except as expressly supplemented hereby, the Indenture is in all respects ratified and
confirmed and all the terms, conditions, and provisions thereof shall remain in full force and effect. This Second Supplemental Indenture shall form a part of the Indenture for all purposes, and every Holder of Notes heretofore or hereafter
authenticated and delivered shall be bound hereby. The Trustee makes no representation or warranty as to the validity or sufficiency of this Second Supplemental Indenture. 
 Section 3.4 Multiple Originals. The parties may sign any number of copies of this Second Supplemental Indenture. Each signed copy shall be an original, but all of them shall represent the
same agreement. 
 Section 3.5 Headings. The headings of the Articles and Sections of this Second Supplemental
Indenture have been inserted for convenience of reference only, are not intended to be considered a part hereof and shall not modify or restrict any of the terms or provisions hereof. 

Section 3.6 Trustee. The Trustee makes no representations as to the validity or sufficiency of this Second Supplemental
Indenture. The recitals and statements herein are deemed to be those of the Company and not of the Trustee. 
 [Rest of page
intentionally left blank] 

  
 2 

 IN WITNESS WHEREOF, the parties hereto have caused this Second Supplemental Indenture to be
duly executed as of the date first written above. 
  

					
	Ameren Illinois Company
		
	By:	 	/s/ Jerre E. Birdsong
		 	Name:  	 	Jerre E. Birdsong
		 	Title:	 	Vice President and Treasurer
	
	The Bank of New York Mellon Trust Company, N.A.,
		 	as Trustee
		
	By:	 	/s/ Kent Schroeder
		 	Name:  	 	Kent Schroeder
		 	Title:	 	Vice President

  
 3

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