Document:

Second Amendment to the Second Lien Credit Agreement

 Exhibit 10.23 
 SECOND AMENDMENT TO SECOND LIEN CREDIT AGREEMENT 
 SECOND AMENDMENT
(this “Amendment”), dated as of May 19, 2010, to the Second Lien Credit Agreement, dated as of December 17, 2009 (as amended, restated, amended and restated, supplemented or otherwise modified from time to time, the
“Credit Agreement”), among HUGHES TELEMATICS, INC., a Delaware corporation (“Borrower”), the lenders party thereto (the “Lenders”), PLASE HT, LLC, as administrative agent for the Lenders (in such
capacity, the “Administrative Agent”) and as collateral agent. Capitalized terms used herein without definition shall have the meanings ascribed to them in the Credit Agreement. 

RECITALS 
 A. Borrower, the Administrative Agent, the Lenders and other parties thereto are party to the Credit Agreement. 
 B. Borrower has requested that certain amendments be made to the Credit Agreement as set forth herein. 
 C. The Lenders signatory hereto are willing to consent to the amendments to the Credit Agreement contained herein, on the terms and subject to the conditions set forth herein. 

AGREEMENT 

NOW, THEREFORE, in consideration of the foregoing and the mutual covenants herein contained, and for other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereby agree as follows: 
 1.
Amendments to Credit Agreement. As of the Second Amendment Effective Date (as defined below) and subject to the satisfaction of the conditions set forth in Section 2 hereof, Section 4.02 of the Credit Agreement is hereby amended by
deleting the word “or” at the end of clause (v) in the parenthetical of clause (c) and replacing it with a comma, and adding the following at the end of such clause (vi): 

“or (vii) the issuance and sale of common stock pursuant to the Stock Purchase Agreement, dated May 13,
2010, by and among the Borrower and each of the purchasers named therein”. 
 2. Effectiveness of this Amendment.
This Amendment shall become effective on and as of the date hereof (the “Second Amendment Effective Date”) provided that all of the following conditions precedent have been satisfied: 

(a) Amendment. The Administrative Agent shall have received this Amendment duly executed and delivered by Borrower
and the Required Lenders; 
 (b) Costs and Expenses. The Borrower shall have paid all expenses required to
be paid under Section 6 of this Amendment for which invoices have been presented (including the reasonable fees and expenses of legal counsel), in connection with this Amendment (or Borrower shall have made arrangements for the payment thereof
satisfactory to the Administrative Agent); 

 (c) First Lien Credit Agreement Amendment. The Administrative Agent
shall have received a copy of a fully executed amendment and consent substantially similar in scope and substance to this Amendment with respect to the Amended and Restated Credit Agreement dated as of April 9, 2007, among Borrower, Morgan
Stanley Senior Funding, Inc., as Administrative Agent and Collateral Agent and the other “Lenders” a party thereto; and 
 (d) No Default. No Default or Event of Default shall have occurred and be continuing or will result from the execution, delivery or effectiveness of this Amendment. 

3. Representations and Warranties. Borrower represents and warrants as follows: 

(a) The Borrower is a duly organized and validly existing Business in good standing under the laws of the jurisdiction of
its organization, (b) has the requisite Business power and authority to own its property and assets and to transact the business in which it is engaged and (c) is duly qualified and is authorized to do business and is in good standing in
each jurisdiction where the ownership, leasing or operation of its property or the conduct of its business requires such qualifications except for failures to be so qualified or authorized which, either individually or in the aggregate, would not
reasonably be expected to have a Material Adverse Effect. No certifications by any Governmental Authority are required for operation of the business of the Borrower that are not in place, except for such certifications or agreements, the absence of
which would not reasonably be expected to have a Material Adverse Effect. 
 (b) The Borrower has the Business
power and authority to execute, deliver and perform the terms and provisions of the Amendment to which it is party and has taken all necessary Business action to authorize the execution, delivery and performance by it of the Amendment. The Borrower
has duly executed and delivered the Amendment to which it is party, and such Amendment constitutes its legal, valid and binding obligation enforceable in accordance with its terms, except to the extent that the enforceability thereof may be limited
by applicable bankruptcy, insolvency, reorganization, moratorium or other similar laws generally affecting creditors’ rights and by equitable principles (regardless of whether enforcement is sought in equity or at law). 

(c) Neither the execution, delivery by the Borrower of the Amendment or the performance by the Borrower of the Credit
Agreement (as amended by the Amendment), nor compliance by it with the terms and provisions thereof, (a) will contravene any provision of any law, statute, rule or regulation or any order, writ, injunction or decree of any court or Governmental
Authority, except for any such contravention that would not reasonably be expected to have a Material Adverse Effect, (b) will conflict with or result in any breach of any of the terms, covenants, conditions or provisions of, or constitute a
default under, or result in the creation or imposition of (or the obligation to create or impose) any Lien (except pursuant to the Security Documents) upon any of the property or assets of the Borrower or any of its Restricted Subsidiaries pursuant
to the terms of any indenture, mortgage, deed of trust, credit agreement or loan agreement, or any other material agreement, contract or instrument, in each case to which the Borrower or any of its Restricted Subsidiaries is a party or by which it
or any its property or assets is bound or to which it may be subject except for any such conflict that would not reasonably be expected to have a Material Adverse Effect, (c) will violate any provision of the certificate or articles of
incorporation, certificate of formation, limited liability company agreement or by-laws (or equivalent organizational documents), as applicable, of the Borrower or any of its Subsidiaries or (d) will be subject to any limitation on right or
approval from any Governmental Authority. 
 (d) No order, consent, approval, license, authorization or
validation of, or filing, recording or registration with (except for those that have otherwise been obtained or made on or prior to the Second Amendment Effective Date and which remain in full force and effect on the Second Amendment Effective
Date), or exemption by, any Governmental Authority is required to be obtained or 

  
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made by, or on behalf of, the Borrower to authorize, or is required to be obtained or made by, or on behalf of, the Borrower in connection with, (i) the execution, delivery and performance
of this Amendment, or (ii) the legality, validity, binding effect or enforceability of the Amendment except where failure to obtain or make the same would not reasonably be expected to have a Material Adverse Effect. 

(e) No event has occurred and is continuing or will result from the execution and delivery of this Amendment that would
constitute a Default or an Event of Default. 
 4. Applicable Law. THIS AMENDMENT AND THE RIGHTS AND OBLIGATIONS OF THE
PARTIES HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE WITH AND BE GOVERNED BY THE LAW OF THE STATE OF NEW YORK. 
 5. WAIVER OF
JURY TRIAL. EACH OF THE PARTIES TO THIS AGREEMENT HEREBY IRREVOCABLY WAIVES ALL RIGHT TO A TRIAL BY JURY IN ANY ACTION, PROCEEDING OR COUNTERCLAIM ARISING OUT OF OR RELATING TO THIS AGREEMENT, THE OTHER CREDIT DOCUMENTS OR THE TRANSACTIONS
CONTEMPLATED HEREBY OR THEREBY. 
 6. Expenses. Without limiting Borrower’s obligations under Section 11.01 of
the Credit Agreement, Borrower hereby agrees to reimburse the Administrative Agent for reasonable and documented out-of-pocket expenses, including the reasonable fees and disbursements of counsel, incurred in connection with this Amendment. The
provisions of Section 11.05 of the Credit Agreement is hereby incorporated by reference herein as if fully set forth and in full force and effect as if written in full herein. 

7. Counterparts. This Amendment may be executed in any number of counterparts and by the different parties hereto on separate
counterparts, each of which when so executed and delivered shall be an original, but all of which shall together constitute one and the same instrument. A set of counterparts executed by all the parties hereto shall be lodged with the Borrower and
the Administrative Agent. Delivery of an executed counterpart hereof by facsimile or electronic transmission shall be as effective as delivery of any original executed counterpart hereof. 

8. Reference to and Effect on the Credit Documents. 

(a) Upon and after the effectiveness of this Amendment, each reference in the Credit Agreement to “this
Agreement”, “hereunder”, “hereof” or words of like import referring to the Credit Agreement, and each reference in the other Credit Documents to “the Credit Agreement”, “thereof” or words of like import
referring to the Credit Agreement, shall mean and be a reference to the Credit Agreement as modified and amended hereby. 
 (b) Except as specifically amended above and as provided for in Section 11 below, the Credit Agreement and all other Credit Documents, are and shall continue to be in full force and effect and are
hereby in all respects ratified and confirmed and shall constitute the legal, valid, binding and enforceable obligations of Borrower to the Administrative Agent and the Lenders, subject to the effects of bankruptcy, insolvency, fraudulent
conveyance, moratorium, reorganization and other similar laws relating to or affecting creditors’ rights generally and general principles of equity (whether considered in a proceeding in equity or law). 

(c) The execution, delivery and effectiveness of this Amendment shall not, except as expressly provided herein, operate as
a waiver of any right, power or remedy of any Agent or any other Lender under any of the Credit Documents, nor constitute a waiver of any provision of any of the Credit Documents. 

  
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 (d) To the extent that any terms and conditions in any of the Credit
Documents shall contradict or be in conflict with any terms or conditions of the Credit Agreement, after giving effect to this Amendment, such terms and conditions are hereby deemed modified or amended accordingly to reflect the terms and conditions
of the Credit Agreement as modified or amended hereby. 
 9. Integration. This Amendment, together with the other Credit
Documents, incorporates all negotiations of the parties hereto with respect to the subject matter hereof and is the final expression and agreement of the parties hereto with respect to the subject matter hereof. 

10. Severability. In case any provision in this Amendment shall be invalid, illegal or unenforceable, such provision shall be
severable from the remainder of this Amendment and the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired thereby. 
 [signature pages follow] 

  
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 IN WITNESS WHEREOF, the parties have entered into this Amendment as of the date first above
written. 
  

			
	HUGHES TELEMATICS INC.,
	a Delaware corporation
		
	By:	 	/s/ CRAIG KAUFMANN
	Name:	 	Craig Kaufmann
	Title:	 	Senior Vice President Finance and Treasurer

 
			
	PLASE HT, LLC
	as Lender
		
	By:	 	/s/ ANDREW AFRICK
	Name:	 	Andrew Africk
	Title:	 	Managing Member

 Accepted, Acknowledged and Agreed: 

			
	
	PLASE HT, LLC,
	as Administrative Agent
		
	By:	 	/s/ ANDREW AFRICK
	Name:	 	Andrew Africk
	Title:	 	Managing Member
	
	PLASE HT, LLC,
	as Collateral Agent
		
	By:	 	/s/ ANDREW AFRICK
	Name:	 	Andrew Africk
	Title:	 	Managing MemberExhibit 4.5.6

 Exhibit 4.5.6 
 FIFTH SUPPLEMENTAL INDENTURE 
 FIFTH SUPPLEMENTAL INDENTURE (this
“Supplemental Indenture”) dated as of June 22, 2010, among PAETEC Holding Corp., a Delaware corporation (the “Issuer”), Quagga Corporation, a subsidiary of the Issuer (the “New Guarantor”), and
The Bank of New York Mellon (formerly known as The Bank of New York), as trustee under the indenture referred to below (the “Trustee”). 
 RECITALS 
 WHEREAS, the Issuer and certain of its Subsidiary
Guarantors have heretofore executed and delivered to the Trustee an Indenture, dated as of July 10, 2007 (as supplemented by the First Supplemental Indenture, the Second Supplemental Indenture, the Third Supplemental Indenture and the Fourth
Supplemental Indenture referred to below, the “Indenture”), providing for an initial issuance of an aggregate principal amount of $300,000,000 of the Issuer’s 9.5% Senior Notes due 2015 (the “Notes”) and
Subsidiary Guarantees of the Notes by the Subsidiary Guarantors, and the Issuer and other Subsidiary Guarantors have heretofore executed and delivered to the Trustee a First Supplemental Indenture, dated as of September 25, 2007 (the
“First Supplemental Indenture”), a Second Supplemental Indenture, dated as of February 8, 2008 (the “Second Supplemental Indenture”), a Third Supplemental Indenture, dated as of December 18, 2009 (the
“Third Supplemental Indenture”), and a Fourth Supplemental Indenture, dated as of April 23, 2010 (the “Fourth Supplemental Indenture”), each providing for Subsidiary Guarantees of the Notes by the Subsidiaries
party thereto; 
 WHEREAS, Sections 4.19 and 10.03 of the Indenture provide that the Issuer is required to
use commercially reasonable efforts to cause its current and future Restricted Subsidiaries that are eligible to be Subsidiary Guarantors under the definition thereof in the Indenture to execute and deliver to the Trustee a supplemental indenture
pursuant to which such Restricted Subsidiaries shall, jointly and severally with the other Subsidiary Guarantors, fully and unconditionally guarantee the payment and performance of the Notes and the other obligations set forth in
Section 10.01 of the Indenture, subject to Article Ten of the Indenture; 
 WHEREAS, the New Guarantor
is a Restricted Subsidiary and is eligible to guarantee the Notes; 
 WHEREAS, this Supplemental Indenture executed
pursuant to Sections 4.19 and 10.03 of the Indenture shall evidence the Subsidiary Guarantee of the New Guarantor set forth in Section 10.01 of the Indenture; 

WHEREAS, pursuant to Section 4.19, Section 9.01 and Section 10.03 of the Indenture, the
Trustee, the Issuer and the New Guarantor are authorized to execute and deliver this Supplemental Indenture and the New Guarantor is authorized to execute and deliver the Subsidiary Guarantee; 

WHEREAS, all acts and requirements necessary to make this Supplemental Indenture the legal, valid and binding obligation of the
Issuer and the New Guarantor have been done; 
 NOW THEREFORE, in consideration of the foregoing and for other good and
valuable consideration, the receipt of which is hereby acknowledged, the parties mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows: 

1. Capitalized Terms. Capitalized terms used in this Supplemental Indenture (including the recitals hereto) without definition
shall have the meanings set forth in the Indenture. 

 2. Agreement to Guarantee. Subject to Article Ten of the Indenture, the New
Guarantor hereby agrees, jointly and severally with the other Subsidiary Guarantors, to guarantee fully and unconditionally to each Holder of a Note and to the Trustee and its successors and assigns the payment and performance of the Notes and the
other obligations set forth in Section 10.01 of the Indenture and to be bound by all other applicable provisions of the Indenture and the Notes. The New Guarantor acknowledges and agrees, pursuant to Section 10.03 of the
Indenture, that, upon its execution and delivery of this Supplemental Indenture, the New Guarantor shall be deemed to be a Subsidiary Guarantor for all purposes of the Indenture (including, without limitation, for purposes of Article Ten
thereof). 
 3. Ratification of Indenture; Supplemental Indenture Part of Indenture. Except as expressly amended 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 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. 
 4. Trustee’s Disclaimer. The
Trustee makes no representation or warranty as to the validity or sufficiency of this Supplemental Indenture. The recitals and the statements herein are deemed to be those of the Issuer and the New Guarantor and not of the Trustee. 

5. Governing Law. THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY THE LAWS OF THE STATE OF NEW YORK. THE ISSUER, THE NEW
GUARANTOR AND THE TRUSTEE AGREE TO SUBMIT TO THE JURISDICTION OF THE COURTS OF THE STATE OF NEW YORK IN ANY ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO THIS SECOND SUPPLEMENTAL INDENTURE. 

6. Successors. All agreements of the New Guarantor in this Supplemental Indenture shall bind its successors. 

7. Counterparts. This Supplemental Indenture may be executed in two or more counterparts, all of which shall be considered one and
the same agreement. 
 8. Effect of Headings. The Section headings herein are for convenience only and shall not affect
the construction thereof. 
 9. Conflict with the Trust Indenture Act. If any provision of this Supplemental Indenture
limits, qualifies or conflicts with any provision of the Trust Indenture Act of 1939 (the “TIA”) that is required under the TIA to be part of and govern any provision of this Supplemental Indenture, the provision of the TIA shall
control. If any provision of this Supplemental Indenture modifies or excludes any provision of the TIA that may be so modified or excluded, the provision of the TIA shall be deemed to apply to the Indenture as so modified or to be excluded by this
Supplemental Indenture. 

  

			
		  	

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

			
	The New Guarantor
	
	Quagga Corporation
		
	By:	 	 /s/ Mary K. O’Connell

	Name:	 	Mary K. O’Connell
	Title:	 	Senior Vice President, General Counsel and Secretary
	
	The Issuer
	
	PAETEC Holding Corp.
		
	By:	 	 /s/ Mary K. O’Connell

	Name:	 	Mary K. O’Connell
	Title:	 	Senior Vice President, General Counsel and Secretary

  

			
		  	

 
			
	The Trustee
	
	The Bank of New York Mellon
		
	By:	 	 /s/ Thomas J. Provenzano

	Name:	 	Thomas J. Provenzano
	Title:	 	Vice President

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