The 7206VXR does support SRST. I am currently at version IOS 12.4(18c) and I have Call-Manager-fallback functionality. I am trying to figure out what is the highest IOS that I can go to before the SRST functionality is stripped out. Cisco has striped out the SRST functionality because they want people to purchased their ISR Branch routers, like a 3825. So I am still trying to find out what the highest IOS version is that still contains SRST functionality.
In theory, if it is available on 12.4(18c), then you can run the latest mainline and still get those features.
That being said,I just tested it, and I can get it up on 12.4(22)T. It at least takes the commands. I'm going to circle back with our BU because we either need to correct the platform documentation, or remove 'call-manager-fallback' in certain releases:
F340.11.14-7200-12#sh ver Cisco IOS Software, 7200 Software (C7200-ADVIPSERVICESK9-M), Version 12.4(22)T, RELEASE SOFTWARE (fc1) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2008 by Cisco Systems, Inc. Compiled Fri 10-Oct-08 10:10 by prod_rel_team
ROM: System Bootstrap, Version 12.2(4r)B2, RELEASE SOFTWARE (fc2)
F340.11.14-7200-12 uptime is 3 weeks, 1 day, 23 hours, 47 minutes System returned to ROM by reload at 00:17:13 UTC Sat Jan 1 2000 System image file is "disk0:c7200-advipservicesk9-mz.124-22.T.bin" Last reload reason: Reload Command
F340.11.14-7200-12#conf t Enter configuration commands, one per line. End with CNTL/Z. F340.11.14-7200-12(config)#call F340.11.14-7200-12(config)#call- F340.11.14-7200-12(config)#call-m F340.11.14-7200-12(config)#call-manager-fallback F340.11.14-7200-12(config-cm-fallback)# *Jan 23 23:47:46.339: %LINEPROTO-5-UPDOWN: Line protocol on Interface EDSP0, changed state to upmax-dn ? <1-1000> Maximum single/dual/octo line directory numbers supported
IntroductionCUCM Routing RulesDial String implementation PolicyCUCM Routing LogicSIP URI Call Routing Analysis+++ Case Study: 1 ++++++ Case Study: 2 +++Conclusion
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