Exhibit 10.23Q

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 (***).

TWENTY-FOURTH AMENDMENT

TO

CSG MASTER SUBSCRIBER MANAGEMENT SYSTEM AGREEMENT

BETWEEN

CSG SYSTEMS, INC.

AND

DISH NETWORK L.L.C.

This TWENTY-FOURTH 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
(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 to the following upon the Effective Date:

 

1. Customer desires, and CSG agrees, to standardize the interfaces and
applications between Customer’s **** and **** environments.

 

2. Exhibit A, Environment Matrix, to this Amendment sets forth the various
environments impacted by the Integrated Operations Testing (“IOT”) environment
standardization. The matrix states (i) whether an environment is needed by
Customer in its **** and/or **** environments, (ii) if an environment is needed,
the environment(s) in which standardization has been completed, and (iii) the
environment(s) in which standardization needs to be completed by way of this
Amendment.

 

3. Customer and CSG agree as to the following assumptions in connection with the
IOT environment standardization:

 

  •  

The **** and **** environments are not designed for load testing. Any load
testing will need to be requested by Customer and coordinated by CSG, with the
potential for increased costs.

 

  •  

The **** and **** environments are not high availability environments, meaning,
there is no redundancy built into any of the hardware or software.

 

  •  

Paper statements must be requested by Customer for any or all of the IOT
environments and will not generate automatically.

 

  •  

Statements will be available in ********* for the **** and **** environments.

 

  •  

Nightly cycle will occur ***** *** **** per week, between **** a.m. and ****
a.m. Mountain time, with the understanding that Customer can request a Friday
afternoon cycle on an exception basis with a minimum of *** *** **** advance
notice.

 

  •  

Current IOT support requirements shall be as set forth in the Twelfth Amendment
to the Agreement (CSG #2308298).

 

  •  

Hardware costs for SLBOS allows for isolated environments for **** and ****
whereby each environment can support its own version of code without impact to
another environment.

 

  •  

Items on Exhibit A, Environment Matrix, listed in the “Environment Needed”
column as “No” have been reviewed by Customer and Customer agrees that those
items are not required at this time. Future requests for those items listed in
the “Environment Needed” column as “No” will be handled independent of this
Amendment.

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

 

  •  

The SLBOS server is approximately an ***** *** **** lead time (*** *** ***** **
***** *** *** *** ***** ** *********).

 

  •  

Code deployments into the **** and **** environments will follow the guidelines
and assumptions set forth in the Twentieth Amendment to the Agreement (CSG
#2309714).

 

4. As a result, Schedule F, Fees, CSG Services, Section I, entitled
“Processing,” subsection G entitled “Integrated Operations Testing Environment
for **** and ****” shall be deleted in its entirety and replaced with the
following:

G. Integrated Operations Testing Environment for environments **** and ****

 

Description of Item/Unit of Measure

   Frequency      Fee  

1. Integrated Operations Testing Environment for environments **** and ****

     

a) MIPS (capacity of ** *** *****)

     *******       $ **********   

b) DASD (capacity of *** ** *** *****) (Note 3)

     *******       $ **********   

c) Allocation of CSG Hardware/Software

     *******       $ **********   

d) Monthly Support (Note 1)

     *******        
  Per Exhibit
A-1.7. (ASH)   
  

2. Additional allocation of CSG Hardware/Software

     ********       $ **********   

3. Build out IOT regions (Note 2)

     ********        
 
  *,*** ***
Per Exhibit
A-1.7. (ASH)   
  
  

Note 1: Monthly support of the IOT environment will be provided on a time and
materials basis using ASH.

Note 2: The build of the IOT environments is on a time and materials basis using
ASH. The ***** ASH listed above are an estimate.

Note 3: For clarification purposes, the DASD capacity includes *** ** (per the
12th Amendment, CSG document number 2308298, executed May 9, 2011), and *** **
(per SOW #2310612, executed October 13, 2011).

For clarification purposes, invoicing for the additional allocation of CSG
Hardware/Software one-time fee of $********** and the monthly increase in
allocation of CSG Hardware/Software of $********* listed above, shall begin in
the month the CSG Smartlink® BOS and Interactivate work is completed (estimated
to be complete ***** **** **** following execution of this Amendment).

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/ Joseph T. Ruble

Name: Michael K. McClaskey     Name: Joseph T. Ruble Title: Senior Vice
President and Chief Information Officer     Title: EVP, CAO & General Counsel
Date: 6-5-12     Date: 6-6-12

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

 

Exhibit A

Environment Matrix

 

     Environment
Needed?    Completed
Environment(s)   

Needed

Environment(s)

***

   Yes    05, 07   

*****

   Yes    05, 07    Isolate 05 and 07

****

   Yes    05, 07   

***** **

   Yes    05, 07   

************ **** **********

   Yes    05, 07   

***** ************ **** ***** *********

   Yes    05, 07   

*** ***************

   Yes    05, 07   

*******

   Yes    05, 07   

********* *******

   Yes    05, 07   

***

   Yes    05, 07   

****** ************

   Yes    05, 07   

******** ******* ******* *****

   Yes    05, 07   

*** ********* ********* ******* **********

   Yes    05, 07   

********* **

   Yes    05, 07   

***

   Yes    05,07   

********* ***

   Yes    05, 07   

***

   Yes    05, 07   

*** ***** ******

   Yes    05, 07   

******

   Yes    05, 07   

*******

   Yes    05, 07   

***********

   Yes    05, 07   

***** *********

   Yes    05    07

************

   Yes    05    07

***** **********

   Yes    05    07

******* *********

   No    05, 07   

*** ** ********

   No    05, 07    none

*** * **

   No    none    none

******* ****

   No    none    none

******* ******

   No    none    none

********

   No    none    none

*********** *********

   No    none    none

*********

   No    05    none

**** *****

   No    05    none

*******

   No    none    none

*******

   No    none    none