Contract

Exhibit 4

SUPPLEMENTAL INDENTURE NO. 1

Supplemental Indenture (this “Supplemental Indenture”), dated as of May 6, 2008, among Helius, LLC, Helius Acquisition, LLC and Advanced Satellite Research, LLC (each, a “Guaranteeing Subsidiary”), each a subsidiary of Xxxxxx Network Systems, LLC (or its permitted successor), a Delaware limited liability company (the “Company”), the Company, HNS Finance Corp. (“HNS Finance” and, together with the Company, the “Issuers”), the other Guarantors (as defined in the Indenture referred to herein) and Xxxxx Fargo Bank, National Association, as trustee under the Indenture referred to below (the “Trustee”).

W I T N E S S E T H

WHEREAS, the Issuers have heretofore executed and delivered to the Trustee an indenture (the “Indenture”), dated as of April 13, 2006 providing for the issuance of 9½% Senior Notes due 2006 (the “Notes”);

WHEREAS, the Indenture provides that under certain circumstances each Guaranteeing Subsidiary shall execute and deliver to the Trustee a supplemental indenture pursuant to which each Guaranteeing Subsidiary shall unconditionally guarantee all of the Issuers’ Obligations under the Notes and the Indenture on the terms and conditions set forth herein (the “Guarantee”); and

WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture.

NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, each Guaranteeing Subsidiary and the Trustee 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 to provide an unconditional Guarantee on the terms and subject to the conditions set forth in the Guarantee and in the Indenture including but not limited to Article 10 thereof.

4.           No Recourse Against Others.  No past, present or future director, manager, officer, employee, incorporator, holder of any Equity Interests in or agent of each Guaranteeing Subsidiary, as such, shall have any liability for any obligations of the Issuers or any 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 of the Notes by accepting a Note waives and releases all such liability.  The waiver and release are part of the consideration for issuance of the Notes.  Such waiver may not be effective to waive liabilities under the federal securities laws and it is the view of the SEC that such a waiver is against public policy.

5.           NEW YORK LAW TO GOVERN.  THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY.

6.           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.

7.           Effect of Headings.  The Section headings herein are for convenience only and shall not affect the construction hereof.

8.           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 the Guaranteeing Subsidiary and the Issuers.

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

	HELIUS, LLC
	By: Xxxxxx Networks Systems, LLC Its sole memeber
	By:	/s/ Xxxx X. Xxxxxx
		Name:	Xxxx X. Xxxxxx
		Title:	Senior Vice President,
			General Counsel and Secretary

	HELIUS ACQUISITION, LLC
	ADVANCED SATELLITE RESEARCH, LLC
	By: Helius, LLC Its sole memeber
	By: Xxxxxx Networks Systems, LLC Its sole memeber
	By:	/s/ Xxxx X. Xxxxxx
		Name:	Xxxx X. Xxxxxx
		Title:	Senior Vice President,
			General Counsel and Secretary

	XXXXXX NETWORK SYSTEMS, LLC
	By:	/s/ Xxxx X. Xxxxxx
		Name:	Xxxx X. Xxxxxx
		Title:	Senior Vice President,
			General Counsel and Secretary

	HNS FINANCE CORP.
	By:	/s/ Xxxx X. Xxxxxx
		Name:	Xxxx X. Xxxxxx
		Title:	Senior Vice President,
			General Counsel and Secretary

	XXXXXX NETWORK SYSTEMS INTERNATIONAL SERVICE COMPANY
	By:	/s/ Xxxx X. Xxxxxx
		Name:	Xxxx X. Xxxxxx
		Title:	Senior Vice President,
			General Counsel and Secretary

	HNS REAL ESTATE, LLC
	By:	/s/ Xxxx X. Xxxxxx
		Name:	Xxxx X. Xxxxxx
		Title:	Senior Vice President,
			General Counsel and Secretary

	HNS-INDIA VSAT, INC.
	By:	/s/ Xxxx X. Xxxxxx
		Name:	Xxxx X. Xxxxxx
		Title:	Senior Vice President,
			General Counsel and Secretary

	HNS-SHANGHAI, INC.
	By:	/s/ Xxxx X. Xxxxxx
		Name:	Xxxx X. Xxxxxx
		Title:	Senior Vice President,
			General Counsel and Secretary

	XXXXX FARGO BANK, NATIONAL ASSOCIATION,
	as Trustee
	By:	/s/ Xxxxxx X. X'Xxxxxxx
		Authorized Signatory