Patent ID: 6956856

Claim:
A method of using a first node to manage a plurality of calls maintained by a second node, comprising the steps of: connecting a first call selected from the plurality of calls to provide a first call through-connection at the second node; receiving a message at the first node announcing the first call through-connection at the second node; and recording a record associated with the first call the record associated with the first call including an indication of the first call through-connection at the second node in a memory of the first node; detecting a second call selected from the plurality of calls during a second setup phase; recording a record associated with the second call in the memory without an indication of a second call through-connection; receiving a message at the first node announcing a restart operation within the second node; examining the record associated with the first call and the record associated with the second call; determining that the record associated with the second call does not include the indication of the second call through-connection; and releasing the second call.