we recently started having the same problem with our 7921. The only recent change is we added the phones extension to a BACD hunt group. I can still dial out if I dial a number by finding it in the call history, but not by typing in the number and trying to press the green send button, or press enter, or selectioned "options->dial".
I decided to do a factory reset of our UC520 and upgrade to the newest 8.1 software pack. After doing that and re-setting up our system the 7921 phone was able to dial out again. Now its the day after and the 7921 once again can't dial!!! nothing changed overnight so i have no idea whats wrong.
All of the other phones work just fine, its just the 7921.
I'm not able to access my old voice mail messages all of a sudden. The recording says something like 'the message is currently not available'. This has never happened before in all the years I have been using this system. I have t...