have a door phone connecting to an ATA 186. If somebody calls via this door phone to a Cisco IP Phone and the called party at the Cisco IP Phone hangs up, the ATA don't close the connection immediatly. So the calling party at the door wait and wait and is confused. How we can configure/force the ATA to disconnect the call too?
The call control is Cisco Callmanager 4.2(3)sr3.