If pc works, the phone should be getting ip address as well as the default is DHCP. Does the phone screen get pass "iniitalizing network" and "checking DNS" at all? If passing those, going into the menu, under setup/network, what is shown there?
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...