So I just got done setting up a UC540 and went to configure the Voicemail using the phone. I can hit the message button on any phone and get the Voicemail setup prompt, but after that it does not respond.
So the first thing it does is ask for you to press 1 to record a name. You can pound away on the 1 button all day and no response. Finally it times out and hangs up on you.
This is on any phone. I've deleted the mailboxes and the phones then rebuilt them, restarted the system multiple times, still no response by VM.