when you are creating sip trunks for different locations(Branch1,2,3..) you will need to point the proper trunk to be used. for that create a Route-group in which you will have your (sip trunk).Then Route-list.
Then create a Route-pattern (e.g 2XXX..CUCME side Extensions) and select appropriate Route-List.
Configure Multicast Paging on the Cisco IP Phone 7800 Series or 8800 Series Multiplatform Phone
The Cisco IP Phone 7800 and 8800 Series Multiplatform Phones provide voice communication over an Internet Protocol (IP) network...
Add Call Park on a Cisco 7800 or 8800 Series Multiplatform Phone Key Expansion Module
Call park allows the user of the phone to put an incoming call on hold so that the call can be retrieved on another phone. A call is park...