This sounds like a classic case of the service provider not sending loop supervision disconnect signaling.

-Is the system using standard loop-start lines?

-Has the customer recently switched to a competitive service provider, such as a cable TV company or CLEC?

-Have you verified that a true open-loop disconnect signal is being sent on all lines connected to the system upon an abandoned call?

-Are you sure that it really disconnects on its own without any user intervention when you say that "CO calls are received through the VM normally"?


Ed Vaughn, MBSWWYPBX