In CCME, you have a built in softkey called DND which, when you push it will silence the call, and if you have a CF setting (to voicemail), pushing the DND soft key will send the call straight to voicemail.
In Callmanager, unfortunately DND is available only with IPManager/Assistant feature, where you can divert all calls to Assistant, and she may transfer them to voicemail or answer the call for you!
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...