I have a UC520 that does not upgrade CUE. I am trying to upgrade to 8.2.0. When usine CCA, I was able to upgrade CME IOS but it failed on the CUE. I tried upgrading CUE on it's own and it failed as well. I now tried upgrading using boot helper command, it starts to copy the file from the TFTP server and then then it aborts? I am thinking a space issue? I don't know.
I had this issue recently as well and moving the call processor back to it's default voice and data VLAN's resolved the issue and I was able to complete a software pack upgrade in full. I suppose it could had been a coincidence though.
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...