Im having major issues with CCA2.1 when trying to Nat ports to an sbs server. I have tried this at a few different sites and most of the time the change wipes out the PPPOE internet connection. Sometimes I can log in using version 2.0 and repair the issue. However most of the time I need to go through the whole config again.
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...