The BE3k by default comes with 5 Trial licenses that will eventually expire. The details that you requested are in the ordering guide that Sanjay has provided a link to. The phones supported are 3905, 6900, 8900 and some 7900 phones.
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...