Cisco 2921 IOS Update - Voice Router

[rajithahettiarachchi]

Hi,

In a customer network setup, has installed CUCM 8.6.2.24901-1 version. Also they have CUE 8.6.1 for voicemail (CUE is in Cisco 2921 ISM module). There are 3 Cisco 2921 routers are located in three offices (Head Office, Site 1 , Site 2). Cisco 2921 routers are used as SRST and to terminate SIP trunks. This routers currently running IOS version 15.2(4)M6a and I want to update IOS to version 15.4(3)M6. My problem is will there be any compatibility issues will occur CUCM, CUE and SRST? Will it update my SRST version, if I update the router IOS?

Regards,

Rajitha

[Mohammed Khan]

SRST version might change.

Refer below compatibility matrix

http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/uc_system/unified/communications/system/versions/IPTMtrix.html

http://docwiki.cisco.com/wiki/Cisco_Unified_SRST_Manager_Compatibility_Matrix