Sorry guys, I was careless in reading the admin doc. It says:
The UC 500 Software Packs are large zip files that contain all necessary files for the UC 500 Series platform. Each zip file contains multiple TAR/archive files and other files for the component of the UC 500, including the • Cisco IOS image for the UC 500 platform
However I would like to confirm that this file in the pack is the UC500 IOS:
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...