We have a customer who requires the ability to be able to receive paging on 7921 handsets. It does work but is very jittery. Sounds like packet loss. We have upgraded the UC to 4.2.7 and the 7921 to 1.1.1 it improved slightly but still not audible. Intercom works fine.
These are the paths to get to each CCX logs through CLI. They may be helpful if you are having issues accessing RTMT or downloading logs through it.
If you want to download them you have to prefix "file get " and you can add one of the options (re...