Unified SRST which is embedded
within Cisco IOS Software to help provide high-availability IP telephony. This feature is usefull to provide backup to IP Phone during faliour of call manager.
I would like to know how long SRST can provide backup to IP phone?
Here we have cisco 3845 router with SRST bundle.
Awaiting for your response
There is no "maximum" time that SRST can remain in effect. You hope that it isn't too long to CCM fixed, but SRST could work indefinitly. Here is a little clip from an excellent SRST Overview;
"Cisco Unified SRST overcomes this problem and ensures that the Cisco IP phones offer continuous (although minimal) service by providing call-handling support for Cisco IP phones directly from the Cisco Unified SRST router."
Cisco Unified SRST Description
Hope this helps!