SRST with T1 CAS MGCP Gateway

Hello - we are trying to configure SRST on our T1 CAS MGCP gateway. We have been informed by a Cisco engineer that we cannot use SRST on a T1 CAS MGCP gateway and that the gateway must first be reconfigured as an H.323 gateway in order to implement SRST. Router is version 12.2(15)T14 and CCM 4.1 Any comments would be truly appreciated...thank you.

SRST doesn't support MGCP but does support MGCP to H.323 failback. You can still configure your router/CCM with MGCP then use the fallback commands for MGCP.
Looking at the SRST 4.0 system guide, page 42, T1 CAS is supported. With your version of IOS you would be running SRST 2.1, this is also supported.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122t/122t15/srst21/srstv21.pdf
http://www.cisco.com/univercd/cc/td/doc/product/voice/srst/srst40/srst40ad/s40sa.pdf
The ccm-manager fallback-mgcp command was added in IOS 12.2(11)T so it should be in your version. This is what you would need to do MGCP fallback to your H323 along with the call application alternate default.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123tcr/123tvr/vrht_c4.htm#wp1061367
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123tcr/123tvr/vrht_c1.htm#wp1670149
I would say it might be possible as I don't see anything saying no. Though remember MGCP fallback to H323 over SRST doesn't have call preservation.
Lastly here is a document on the SRST MGCP/H323 fallback.
http://www.cisco.com/en/US/tech/tk1077/technologies_configuration_example09186a008012ecc6.shtml
Please rate any helpful posts
Thanks
Fred

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<---
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That is a good news though. Can you please share to me the TAC case nr? So I can refer this to tAC. Because we have also opened a CASE for the same problem on the 3725 but not hear from TAC yet for the patch!
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Regards

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System returned to ROM by power-on
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MGCP Domain Name: 2811.homelab.local
Priority        Status                   Host
============================================================
Primary         None
First Backup    None
Second Backup   None
Current active Call Manager:    None
Backhaul/Redundant link port:   2428
Failover Interval:              30 seconds
Keepalive Interval:             15 seconds
Last keepalive sent:            09:55:04 PCLAIRE Jan 16 2014 (elapsed time: 02:00:24)
Last MGCP traffic time:         11:34:19 PCLAIRE Jan 16 2014 (elapsed time: 00:21:08)
Last failover time:             None
Last switchback time:           None
Switchback mode:                Graceful
MGCP Fallback mode:             Not Selected
Last MGCP Fallback start time: None
Last MGCP Fallback end time:    None
MGCP Download Tones:            Disabled
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Configuration Auto-Download Information
=======================================
No configurations downloaded
Current state: Downloading XML file
Configuration Download statistics:
        Download Attempted             : 1
          Download Successful          : 1
          Download Failed              : 0
        Configuration Attempted        : 0
          Configuration Successful     : 0
          Configuration Failed(Parsing): 0
          Configuration Failed(config) : 0
Last config download command:
FAX mode: cisco
Configuration Error History:
2811(config)#
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