Document:

EX-10.02

 Exhibit 10.02 
 Execution Version 
 SUPPLEMENTAL INDENTURE 

Supplemental Indenture (this “Supplemental Indenture”), dated as of June 19, 2012 among Hypercube, LLC, a Delaware
limited liability company (“Hypercube”), Annex Holdings HC Corporation, a Delaware corporation (“Annex”), and Rubik Acquisition Company, LLC, a Delaware limited liability company (“Rubik” and,
together with Hypercube, and Annex, each, a “Guaranteeing Subsidiary” and, together, the “Guaranteeing Subsidiaries”), West Corporation, a Delaware corporation (the “Issuer”), and The Bank of New
York Mellon Trust Company, N.A., as trustee (the “Trustee”). 
 W I T N E S S E T H 

WHEREAS, each of West Corporation and the Guarantors (as defined in the Indenture referred to below) has heretofore
executed and delivered to the Trustee an indenture (the “Indenture”), dated as of October 5, 2010, providing for the issuance of an unlimited aggregate principal amount of 8  5/8% Senior Notes due 2018 (the “Notes”); 
 WHEREAS, the
Indenture provides that under certain circumstances the Guaranteeing Subsidiaries shall execute and deliver to the Trustee a supplemental indenture pursuant to which each Guaranteeing Subsidiary shall unconditionally guarantee all of the
Issuer’s Obligations under the Notes and the Indenture on the terms and conditions set forth herein and under the Indenture (the “Guarantee”); 
 WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture; and 

WHEREAS, all things necessary to make this Supplemental Indenture the legal, valid and binding obligation of the Issuer and each
Guaranteeing Subsidiary 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 herein without definition shall have the meanings assigned to them in the Indenture. 

(2) Agreement to Guarantee. Each Guaranteeing Subsidiary hereby agrees as follows: 

(a) Along with all Guarantors named in the Indenture, to jointly and severally unconditionally guarantee to each Holder of
a Note authenticated and delivered by the Trustee and to the Trustee and its successors and assigns, irrespective of the validity and enforceability of the Indenture, the Notes or the obligations of the Issuer hereunder or thereunder, that:

 (i) the principal of and interest, premium and Additional Interest, if any, on the Notes will be promptly paid
in full when due, whether at maturity, by acceleration, redemption or otherwise, and interest on the overdue principal of and interest on the Notes, if any, if lawful, and all other obligations of the Issuer to the Holders or the Trustee hereunder
or thereunder will be promptly paid in full or performed, all in accordance with the terms hereof and thereof; and 

 (ii) in case of any extension of time of payment or renewal of any Notes or
any of such other obligations, the same will be promptly paid in full when due or performed in accordance with the terms of the extension or renewal, whether at stated maturity, by acceleration or otherwise. Failing payment when due of any amount so
guaranteed or any performance so guaranteed for whatever reason, the Guarantors and each Guaranteeing Subsidiary shall be jointly and severally obligated to pay the same immediately. This is a guarantee of payment and not a guarantee of collection.

 (b) The obligations hereunder shall be unconditional, irrespective of the validity, regularity or
enforceability of the Notes or the Indenture, the absence of any action to enforce the same, any waiver or consent by any Holder of the Notes with respect to any provisions hereof or thereof, the recovery of any judgment against the Issuer, any
action to enforce the same or any other circumstance which might otherwise constitute a legal or equitable discharge or defense of a guarantor. 
 (c) The following are hereby waived: diligence, presentment, demand of payment, filing of claims with a court in the event of insolvency or bankruptcy of the Issuer, any right to require a proceeding
first against the Issuer, protest, notice and all demands whatsoever. 
 (d) This Guarantee shall not be
discharged except by complete performance of the obligations contained in the Notes, the Indenture and this Supplemental Indenture, and each Guaranteeing Subsidiary accepts all obligations of a Guarantor under the Indenture. 

(e) If any Holder or the Trustee is required by any court or otherwise to return to the Issuer, the Guarantors (including
each Guaranteeing Subsidiary), or any custodian, trustee, liquidator or other similar official acting in relation to either the Issuer or the Guarantors, any amount paid either to the Trustee or such Holder, this Guarantee, to the extent theretofore
discharged, shall be reinstated in full force and effect. 
 (f) No Guaranteeing Subsidiary shall be entitled to
any right of subrogation in relation to the Holders in respect of any obligations guaranteed hereby until payment in full of all obligations guaranteed hereby. 
 (g) As between each of the Guaranteeing Subsidiaries, on the one hand, and the Holders and the Trustee, on the other hand, (x) the maturity of the obligations guaranteed hereby may be accelerated as
provided in Article 6 of the Indenture for the purposes of this Guarantee, notwithstanding any stay, injunction or other prohibition preventing such acceleration in respect of the obligations guaranteed hereby, and (y) in the event of any
declaration of acceleration of such obligations as provided in Article 6 of the Indenture, such obligations (whether or not due and payable) shall forthwith become due and payable by each Guaranteeing Subsidiary for the purpose of this Guarantee.

 (h) Each Guaranteeing Subsidiary shall have the right to seek contribution from any non-paying Guarantor so
long as the exercise of such right does not impair the rights of the Holders under this Guarantee. 
 (i)
Pursuant to Section 10.02 of the Indenture, after giving effect to all other contingent and fixed liabilities that are relevant under any applicable Bankruptcy or fraudulent conveyance laws, and after giving effect to any collections from,
rights to receive contribution from or payments made by or on behalf of any other Guarantor in respect of the obligations of such other Guarantor under Article 10 of the Indenture, this new Guarantee shall be limited to the maximum amount
permissible such that the obligations of each Guaranteeing Subsidiary under this Guarantee will not constitute a fraudulent transfer or conveyance. 

  
 2 

 (j) This Guarantee shall remain in full force and effect and continue to be
effective should any petition be filed by or against the Issuer for liquidation, reorganization, should the Issuer become insolvent or make an assignment for the benefit of creditors or should a receiver or trustee be appointed for all or any
significant part of the Issuer’s assets, and shall, to the fullest extent permitted by law, continue to be effective or be reinstated, as the case may be, if at any time payment and performance of the Notes are, pursuant to applicable law,
rescinded or reduced in amount, or must otherwise be restored or returned by any obligee on the Notes and Guarantee, whether as a “voidable preference”, “fraudulent transfer” or otherwise, all as though such payment or
performance had not been made. In the event that any payment or any part thereof, is rescinded, reduced, restored or returned, the Note shall, to the fullest extent permitted by law, be reinstated and deemed reduced only by such amount paid and not
so rescinded, reduced, restored or returned. 
 (k) In case any provision of this Guarantee shall be invalid,
illegal or unenforceable, the validity, legality, and enforceability of the remaining provisions shall not in any way be affected or impaired thereby. 
 (l) This Guarantee shall be a general unsecured senior obligation of each Guaranteeing Subsidiary, ranking pari passu with any other future Senior Indebtedness of each Guaranteeing
Subsidiary, if any. 
 (m) Each payment to be made by a Guaranteeing Subsidiary in respect of this Guarantee
shall be made without set-off, counterclaim, reduction or diminution of any kind or nature. 
 (3) Execution and
Delivery. Each Guaranteeing Subsidiary agrees that the Guarantee shall remain in full force and effect notwithstanding the absence of the endorsement of any notation of such Guarantee on the Notes. 

(4) Merger, Consolidation or Sale of All or Substantially All Assets. 

(a) Except as otherwise provided in Section 5.01(c) of the Indenture, no Guaranteeing Subsidiary may consolidate or merge with or
into or wind up into (whether or not the Issuer or such Guaranteeing Subsidiary is the surviving corporation), or sell, assign, transfer, lease, convey or otherwise dispose of all or substantially all of its properties or assets, in one or more
related transactions, to any Person unless: 
 (i)(A) such Guaranteeing Subsidiary is the surviving
corporation or the Person formed by or surviving any such consolidation or merger (if other than such Guaranteeing Subsidiary) or to which such sale, assignment, transfer, lease, conveyance or other disposition will have been made is a corporation
organized or existing under the laws of the jurisdiction of organization of such Guaranteeing Subsidiary, as the case may be, or the laws of the United States, any state thereof, the District of Columbia, or any territory thereof (such Guaranteeing
Subsidiary or such Person, as the case may be, being herein called the “Successor Person”); 

(B) the Successor Person, if other than such Guaranteeing Subsidiary, expressly assumes all the obligations of such
Guaranteeing Subsidiary under the Indenture and such Guaranteeing Subsidiary’s related Guarantee pursuant to supplemental indentures or other documents or instruments in form reasonably satisfactory to the Trustee; 

  
 3 

 (C) immediately after such transaction, no Default exists; and 

(D) the Issuer shall have delivered to the Trustee an Officer’s Certificate and an Opinion of Counsel, each stating
that such consolidation, merger or transfer and such supplemental indentures, if any, comply with the Indenture; or 
 (ii) the transaction is made in compliance with Sections 4.10(a)(1) and (2) of the Indenture; 
 (b) Subject to certain limitations described in the Indenture, the Successor Person will succeed to, and be substituted for, such Guaranteeing Subsidiary under the Indenture and such Guaranteeing
Subsidiary’s Guarantee. Notwithstanding the foregoing, any Guaranteeing Subsidiary may merge into or transfer all or part of its properties and assets to another Guarantor or the Issuer. 

(5) Releases. 
 The Guarantee of any Guaranteeing Subsidiary shall be automatically and unconditionally released and discharged, and no further action by such Guaranteeing Subsidiary, the Issuer or the Trustee is
required for the release of such Guaranteeing Subsidiary’s Guarantee, upon: 
 (1)(A) any sale, exchange or
transfer (by merger or otherwise) of the Capital Stock of such Guaranteeing Subsidiary (including any sale, exchange or transfer), after which such Guaranteeing Subsidiary is no longer a Restricted Subsidiary or all or substantially all the assets
of such Guaranteeing Subsidiary which sale, exchange or transfer is made in compliance with Sections 4.10(a)(1) and (2) of the Indenture; 
 (B) the release or discharge of the guarantee by such Guaranteeing Subsidiary of the Senior Credit Facilities or the guarantee which resulted in the creation of the Guarantee, except a discharge or
release by or as a result of payment under such guarantee; 
 (C) the proper designation of such Guaranteeing
Subsidiary as an Unrestricted Subsidiary; or 
 (D) the Issuer exercising its Legal Defeasance option or Covenant
Defeasance option in accordance with Article 8 of the Indenture or the Issuer’s obligations under the Indenture being discharged in accordance with the terms of the Indenture; and 

(2) such Guaranteeing Subsidiary delivering to the Trustee an Officer’s Certificate and an Opinion of Counsel, each
stating that all conditions precedent provided for in the Indenture relating to such transaction have been complied with. 
 (6)
No Recourse Against Others. No director, officer, employee, incorporator or stockholder of any Guaranteeing Subsidiary shall have any liability for any obligations of the Issuer or the Guarantors (including such Guaranteeing Subsidiary) under
the Notes, any Guarantees, the Indenture or this Supplemental Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder by accepting Notes waives and releases all such liability. The waiver
and release are part of the consideration for issuance of the Notes. 

  
 4 

 (7) Governing Law. THIS SUPPLEMENTAL INDENTURE WILL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK. 
 (8) Counterparts. The parties may sign any number of copies of this
Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. 
 (9)
Effect of Headings. The Section headings herein are for convenience only and shall not affect the construction hereof. 

(10) The Trustee. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency
of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by each Guaranteeing Subsidiary. 
 (11) Subrogation. Each Guaranteeing Subsidiary shall be subrogated to all rights of Holders of Notes against the Issuer in respect of any amounts paid by each Guaranteeing Subsidiary pursuant to
the provisions of Section 2 hereof and Section 10.01 of the Indenture; provided that, if an Event of Default has occurred and is continuing, no Guaranteeing Subsidiary shall be entitled to enforce or receive any payments arising out
of, or based upon, such right of subrogation until all amounts then due and payable by the Issuer under the Indenture or the Notes shall have been paid in full. 
 (12) Benefits Acknowledged. Each Guaranteeing Subsidiary’s Guarantee is subject to the terms and conditions set forth in the Indenture. Each Guaranteeing Subsidiary acknowledges that it will
receive direct and indirect benefits from the financing arrangements contemplated by the Indenture and this Supplemental Indenture and that the guarantee and waivers made by it pursuant to this Guarantee are knowingly made in contemplation of such
benefits. 
 (13) Successors. All agreements of each Guaranteeing Subsidiary in this Supplemental Indenture shall bind
its Successors, except as otherwise provided in Section 2(k) hereof or elsewhere in this Supplemental Indenture. All agreements of the Trustee in this Supplemental Indenture shall bind its successors. 

[Signature Pages Follow] 

  
 5 

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

			
	HYPERCUBE, LLC
		
	By:	 	 /s/ Paul M. Mendlik

	Name:	 	Paul M. Mendlik
	Title:	 	Chief Financial Officer and Treasurer
	
	ANNEX HOLDINGS HC CORPORATION
		
	By:	 	 /s/ Paul M. Mendlik

	Name:	 	Paul M. Mendlik
	Title:	 	Chief Financial Officer and Treasurer
	
	RUBIK ACQUISITION COMPANY, LLC
		
	By:	 	 /s/ Paul M. Mendlik

	Name:	 	Paul M. Mendlik
	Title:	 	Chief Financial Officer and Treasurer

 [Signature Page – Supplemental Senior Notes Indenture No. 3 (2018)] 

 
			
	THE BANK OF NEW YORK MELLON TRUST
COMPANY,
N.A., AS TRUSTEE
		
	By:	 	 /s/ Lawrence W. Kusch

	Name:	 	Lawrence W. Kusch
	Title:	 	Vice President

 [Signature Page – Supplemental Senior Notes Indenture No. 3 (2018)] 

  

 Acknowledged and Agreed to by: 
 WEST CORPORATION 
  

			
	 By:
	 	 /s/ Paul M. Mendlik

	 Name:
	 	Paul M. Mendlik
	 Title:
	 	Chief Financial Officer and Treasurer

  
 [Signature
Page – Supplemental Senior Notes Indenture No. 3 (2018)]EX-10.03

 Exhibit 10.03 
 Execution Version 
 SUPPLEMENTAL INDENTURE 

Supplemental Indenture (this “Supplemental Indenture”), dated as of June 19, 2012 among Hypercube, LLC, a Delaware
limited liability company (“Hypercube”), Annex Holdings HC Corporation, a Delaware corporation (“Annex”), and Rubik Acquisition Company, LLC, a Delaware limited liability company (“Rubik” and,
together with Hypercube, and Annex, each, a “Guaranteeing Subsidiary” and, together, the “Guaranteeing Subsidiaries”), West Corporation, a Delaware corporation (the “Issuer”), and The Bank of New
York Mellon Trust Company, N.A., as trustee (the “Trustee”). 
 W I T N E S S E T H 

WHEREAS, each of West Corporation and the Guarantors (as defined in the Indenture referred to below) has heretofore
executed and delivered to the Trustee an indenture (the “Indenture”), dated as of November 24, 2010, providing for the issuance of an unlimited aggregate principal amount of 7  7/8% Senior Notes due 2019 (the “Notes”); 
 WHEREAS, the
Indenture provides that under certain circumstances the Guaranteeing Subsidiaries shall execute and deliver to the Trustee a supplemental indenture pursuant to which each Guaranteeing Subsidiary shall unconditionally guarantee all of the
Issuer’s Obligations under the Notes and the Indenture on the terms and conditions set forth herein and under the Indenture (the “Guarantee”); 
 WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture; and 

WHEREAS, all things necessary to make this Supplemental Indenture the legal, valid and binding obligation of the Issuer and each
Guaranteeing Subsidiary 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 herein without definition shall have the meanings assigned to them in the Indenture. 

(2) Agreement to Guarantee. Each Guaranteeing Subsidiary hereby agrees as follows: 

(a) Along with all Guarantors named in the Indenture, to jointly and severally unconditionally guarantee to each Holder of
a Note authenticated and delivered by the Trustee and to the Trustee and its successors and assigns, irrespective of the validity and enforceability of the Indenture, the Notes or the obligations of the Issuer hereunder or thereunder, that:

 (i) the principal of and interest, premium and Additional Interest, if any, on the Notes will be promptly paid
in full when due, whether at maturity, by acceleration, redemption or otherwise, and interest on the overdue principal of and interest on the Notes, if any, if lawful, and all other obligations of the Issuer to the Holders or the Trustee hereunder
or thereunder will be promptly paid in full or performed, all in accordance with the terms hereof and thereof; and 

 (ii) in case of any extension of time of payment or renewal of any Notes or
any of such other obligations, the same will be promptly paid in full when due or performed in accordance with the terms of the extension or renewal, whether at stated maturity, by acceleration or otherwise. Failing payment when due of any amount so
guaranteed or any performance so guaranteed for whatever reason, the Guarantors and each Guaranteeing Subsidiary shall be jointly and severally obligated to pay the same immediately. This is a guarantee of payment and not a guarantee of collection.

 (b) The obligations hereunder shall be unconditional, irrespective of the validity, regularity or
enforceability of the Notes or the Indenture, the absence of any action to enforce the same, any waiver or consent by any Holder of the Notes with respect to any provisions hereof or thereof, the recovery of any judgment against the Issuer, any
action to enforce the same or any other circumstance which might otherwise constitute a legal or equitable discharge or defense of a guarantor. 
 (c) The following are hereby waived: diligence, presentment, demand of payment, filing of claims with a court in the event of insolvency or bankruptcy of the Issuer, any right to require a proceeding
first against the Issuer, protest, notice and all demands whatsoever. 
 (d) This Guarantee shall not be
discharged except by complete performance of the obligations contained in the Notes, the Indenture and this Supplemental Indenture, and each Guaranteeing Subsidiary accepts all obligations of a Guarantor under the Indenture. 

(e) If any Holder or the Trustee is required by any court or otherwise to return to the Issuer, the Guarantors (including
each Guaranteeing Subsidiary), or any custodian, trustee, liquidator or other similar official acting in relation to either the Issuer or the Guarantors, any amount paid either to the Trustee or such Holder, this Guarantee, to the extent theretofore
discharged, shall be reinstated in full force and effect. 
 (f) No Guaranteeing Subsidiary shall be entitled to
any right of subrogation in relation to the Holders in respect of any obligations guaranteed hereby until payment in full of all obligations guaranteed hereby. 
 (g) As between each of the Guaranteeing Subsidiaries, on the one hand, and the Holders and the Trustee, on the other hand, (x) the maturity of the obligations guaranteed hereby may be accelerated as
provided in Article 6 of the Indenture for the purposes of this Guarantee, notwithstanding any stay, injunction or other prohibition preventing such acceleration in respect of the obligations guaranteed hereby, and (y) in the event of any
declaration of acceleration of such obligations as provided in Article 6 of the Indenture, such obligations (whether or not due and payable) shall forthwith become due and payable by each Guaranteeing Subsidiary for the purpose of this Guarantee.

 (h) Each Guaranteeing Subsidiary shall have the right to seek contribution from any non-paying Guarantor so
long as the exercise of such right does not impair the rights of the Holders under this Guarantee. 
 (i)
Pursuant to Section 10.02 of the Indenture, after giving effect to all other contingent and fixed liabilities that are relevant under any applicable Bankruptcy or fraudulent conveyance laws, and after giving effect to any collections from,
rights to receive contribution from or payments made by or on behalf of any other Guarantor in respect of the obligations of such other Guarantor under Article 10 of the Indenture, this new Guarantee shall be limited to the maximum amount
permissible such that the obligations of each Guaranteeing Subsidiary under this Guarantee will not constitute a fraudulent transfer or conveyance. 

  
 2 

 (j) This Guarantee shall remain in full force and effect and continue to be
effective should any petition be filed by or against the Issuer for liquidation, reorganization, should the Issuer become insolvent or make an assignment for the benefit of creditors or should a receiver or trustee be appointed for all or any
significant part of the Issuer’s assets, and shall, to the fullest extent permitted by law, continue to be effective or be reinstated, as the case may be, if at any time payment and performance of the Notes are, pursuant to applicable law,
rescinded or reduced in amount, or must otherwise be restored or returned by any obligee on the Notes and Guarantee, whether as a “voidable preference”, “fraudulent transfer” or otherwise, all as though such payment or
performance had not been made. In the event that any payment or any part thereof, is rescinded, reduced, restored or returned, the Note shall, to the fullest extent permitted by law, be reinstated and deemed reduced only by such amount paid and not
so rescinded, reduced, restored or returned. 
 (k) In case any provision of this Guarantee shall be invalid,
illegal or unenforceable, the validity, legality, and enforceability of the remaining provisions shall not in any way be affected or impaired thereby. 
 (l) This Guarantee shall be a general unsecured senior obligation of each Guaranteeing Subsidiary, ranking pari passu with any other future Senior Indebtedness of each Guaranteeing
Subsidiary, if any. 
 (m) Each payment to be made by a Guaranteeing Subsidiary in respect of this Guarantee
shall be made without set-off, counterclaim, reduction or diminution of any kind or nature. 
 (3) Execution and
Delivery. Each Guaranteeing Subsidiary agrees that the Guarantee shall remain in full force and effect notwithstanding the absence of the endorsement of any notation of such Guarantee on the Notes. 

(4) Merger, Consolidation or Sale of All or Substantially All Assets. 

(a) Except as otherwise provided in Section 5.01(c) of the Indenture, no Guaranteeing Subsidiary may consolidate or merge with or
into or wind up into (whether or not the Issuer or such Guaranteeing Subsidiary is the surviving corporation), or sell, assign, transfer, lease, convey or otherwise dispose of all or substantially all of its properties or assets, in one or more
related transactions, to any Person unless: 
 (i)(A) such Guaranteeing Subsidiary is the surviving
corporation or the Person formed by or surviving any such consolidation or merger (if other than such Guaranteeing Subsidiary) or to which such sale, assignment, transfer, lease, conveyance or other disposition will have been made is a corporation
organized or existing under the laws of the jurisdiction of organization of such Guaranteeing Subsidiary, as the case may be, or the laws of the United States, any state thereof, the District of Columbia, or any territory thereof (such Guaranteeing
Subsidiary or such Person, as the case may be, being herein called the “Successor Person”); 

(B) the Successor Person, if other than such Guaranteeing Subsidiary, expressly assumes all the obligations of such
Guaranteeing Subsidiary under the Indenture and such Guaranteeing Subsidiary’s related Guarantee pursuant to supplemental indentures or other documents or instruments in form reasonably satisfactory to the Trustee; 

  
 3 

 (C) immediately after such transaction, no Default exists; and 

(D) the Issuer shall have delivered to the Trustee an Officer’s Certificate and an Opinion of Counsel, each stating
that such consolidation, merger or transfer and such supplemental indentures, if any, comply with the Indenture; or 
 (ii) the transaction is made in compliance with Sections 4.10(a)(1) and (2) of the Indenture; 
 (b) Subject to certain limitations described in the Indenture, the Successor Person will succeed to, and be substituted for, such Guaranteeing Subsidiary under the Indenture and such Guaranteeing
Subsidiary’s Guarantee. Notwithstanding the foregoing, any Guaranteeing Subsidiary may merge into or transfer all or part of its properties and assets to another Guarantor or the Issuer. 

(5) Releases. 
 The Guarantee of any Guaranteeing Subsidiary shall be automatically and unconditionally released and discharged, and no further action by such Guaranteeing Subsidiary, the Issuer or the Trustee is
required for the release of such Guaranteeing Subsidiary’s Guarantee, upon: 
 (1)(A) any sale, exchange or
transfer (by merger or otherwise) of the Capital Stock of such Guaranteeing Subsidiary (including any sale, exchange or transfer), after which such Guaranteeing Subsidiary is no longer a Restricted Subsidiary or all or substantially all the assets
of such Guaranteeing Subsidiary which sale, exchange or transfer is made in compliance with Sections 4.10(a)(1) and (2) of the Indenture; 
 (B) the release or discharge of the guarantee by such Guaranteeing Subsidiary of the Senior Credit Facilities or the guarantee which resulted in the creation of the Guarantee, except a discharge or
release by or as a result of payment under such guarantee; 
 (C) the proper designation of such Guaranteeing
Subsidiary as an Unrestricted Subsidiary; or 
 (D) the Issuer exercising its Legal Defeasance option or Covenant
Defeasance option in accordance with Article 8 of the Indenture or the Issuer’s obligations under the Indenture being discharged in accordance with the terms of the Indenture; and 

(2) such Guaranteeing Subsidiary delivering to the Trustee an Officer’s Certificate and an Opinion of Counsel, each
stating that all conditions precedent provided for in the Indenture relating to such transaction have been complied with. 
 (6)
No Recourse Against Others. No director, officer, employee, incorporator or stockholder of any Guaranteeing Subsidiary shall have any liability for any obligations of the Issuer or the Guarantors (including such Guaranteeing Subsidiary) under
the Notes, any Guarantees, the Indenture or this Supplemental Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder by accepting Notes waives and releases all such liability. The waiver
and release are part of the consideration for issuance of the Notes. 

  
 4 

 (7) Governing Law. THIS SUPPLEMENTAL INDENTURE WILL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK. 
 (8) Counterparts. The parties may sign any number of copies of this
Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. 
 (9)
Effect of Headings. The Section headings herein are for convenience only and shall not affect the construction hereof. 

(10) The Trustee. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency
of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by each Guaranteeing Subsidiary. 
 (11) Subrogation. Each Guaranteeing Subsidiary shall be subrogated to all rights of Holders of Notes against the Issuer in respect of any amounts paid by each Guaranteeing Subsidiary pursuant to
the provisions of Section 2 hereof and Section 10.01 of the Indenture; provided that, if an Event of Default has occurred and is continuing, no Guaranteeing Subsidiary shall be entitled to enforce or receive any payments arising out
of, or based upon, such right of subrogation until all amounts then due and payable by the Issuer under the Indenture or the Notes shall have been paid in full. 
 (12) Benefits Acknowledged. Each Guaranteeing Subsidiary’s Guarantee is subject to the terms and conditions set forth in the Indenture. Each Guaranteeing Subsidiary acknowledges that it will
receive direct and indirect benefits from the financing arrangements contemplated by the Indenture and this Supplemental Indenture and that the guarantee and waivers made by it pursuant to this Guarantee are knowingly made in contemplation of such
benefits. 
 (13) Successors. All agreements of each Guaranteeing Subsidiary in this Supplemental Indenture shall bind
its Successors, except as otherwise provided in Section 2(k) hereof or elsewhere in this Supplemental Indenture. All agreements of the Trustee in this Supplemental Indenture shall bind its successors. 

[Signature Pages Follow] 

  
 5 

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

			
	HYPERCUBE, LLC
		
	By:	 	 /s/ Paul M. Mendlik

	Name:	 	Paul M. Mendlik
	Title:	 	Chief Financial Officer and Treasurer
	
	ANNEX HOLDINGS HC CORPORATION
		
	By:	 	 /s/ Paul M. Mendlik

	Name:	 	Paul M. Mendlik
	Title:	 	Chief Financial Officer and Treasurer
	
	RUBIK ACQUISITION COMPANY, LLC
		
	By:	 	 /s/ Paul M. Mendlik

	Name:	 	Paul M. Mendlik
	Title:	 	Chief Financial Officer and Treasurer

 [Signature Page – Supplemental Senior Notes Indenture No. 3 (2019)] 

 
			
	THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A.,
AS TRUSTEE
		
	By:	 	 /s/ Lawrence M. Kusch

	Name:	 	Lawrence M. Kusch
	Title:	 	Vice President

  
 [Signature
Page – Supplemental Senior Notes Indenture No. 3 (2019)] 

 Acknowledged and Agreed to by: 
 WEST CORPORATION 
  

			
	 By:
	 	 /s/ Paul M. Mendlik

	 Name:
	 	Paul M. Mendlik
	 Title:
	 	Chief Financial Officer and Treasurer

  
 [Signature
Page – Supplemental Senior Notes Indenture No. 3 (2019)]

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