In order to fix the issue, check the owner for the call handler subscriber. A ghost owner for the call handler can potentially cause this error.
The error message means that the same call is routed to the same call handler several times in a row. It appears that PHGreeting has the error greeting set to loop back onto itself, so the call continues to hit the error greeting and loop back.
The Audio Text Manager (ATM) is designed to provide a fast, graphical view of the call flow patterns configured in the Cisco Unity database and to allow for the modification of that flow quickly and easily.