compatibility for call manager 10.5 with ISR G1 router

[baskaranm1]

Hi I planning to use call manger version 10.5 with 2800 & 3800 routers for media resources. and the current 2800 & 3800 router is having the below IOS .  it is possible to the existing router with the current IOS for transcoding and conferencing? because one of the documents says it requires 15.1 IOS to work with call manager 10.5. please suggest.below is th elink for the compatibility of CUCM 10.5

c2800nm-advipservicesk9-mz.124-15.T1.bin

http://tools.cisco.com/ITDIT/vtgsca/VTGServlet

[Manish Gogna · Accepted solution]

These routers will still work with cucm 10.x and 11.x and can be configured for transcoding as well if DSP's are present. the versions listed in the doc are the recommended ones, however lower versions of IOS are also able to work. It is recommended to be on higher versions to get feature enhancements and bug fixes.

Manish