History on a strange issue:
We replaced a VM for a customer because theirs was dead. The replacement VM is a flash based 4 port. After the VM was replaced we started making test calls and everything seemed great. However about an hour later we noticed the VM ports were stuck in a loop and would not release without a power cycle. For some reason calls are coming into the auto-attendant and then at some point the VM ports get stuck in a loop. I checked the UCD programming and they seem fine for the application. If we remove the pre-defined forward busy to VM. The problem seems to clear. Tech support said we need to upgrade from A32 to A33 to be able to send a caller to VM while busy. So we upgraded and re-programmed from scratch. The problem is back after a week. We removed pre-defined busy to VM to see what happens.

Any idea's?