The PG will set the agent to "Not Ready" when two consecutive calls fail to be delivered. Clearly a configuration error can cause this condition - the agent is chosen by the Call Router to receive the call, but there is no label for the agent's device target on the Routing Client controlling the call; or there is no SIP static route, and so on.
If calls normally arrive at said agent, but occasionally fail, you need to dig further into the CVP logs or your CUCM logs.
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...