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.    *********** *** ******* (*** ******* *********)

   *******    **,***.**

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***   

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.

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***’* ******* ******** ***********:

 

  •  

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  •  

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

 

  •  

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

 

  •  

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***** **** ******* *** ******** ** ** **********. ** ** *******, ** ******** ***
***,*** ************ ** *** ***** *****, *** *** *** *** ***,*** ************
***** *** ******** ** *** ******* ******* ******** *********** ** ***,***
************, ***** ** ** *** **** ** **.** *** ***********.

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

**** *: ********** ********. ******** ****** **** ********** **** *** **
********* ******** *********** ***** ** ********** ****** ******** ****** ***
******* ******** *********** *** ******** ***** ** *********** *** *** *******
** ***** **** ** ********** ** **** ********.

**** *: ********** ******* **********. *** ******* ** ********** ** *** *******
********** ***** ** *** ***** ** ******** ****** **** ************ ** ****.

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.

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***   

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:   9/23/11