We are currently quoting a UC520 for a police station application. They will have a handful of phones lines coming in through a T1 line primarily. The question was asked that if a situation arose where the T1 went down and those phones lines were no longer functioning, could the UC520 fail-over to the built-in 4 port FXO ports for both incoming and outgoing calls.
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...