Patent ID: 7768996

Claim:
A network device, comprising: a port to transmit an initial admission request to a gatekeeper, to receive first routing information for a first call attempt from the gatekeeper, to transmit a set up message to a terminating endpoint associated with a receiving station, and to receive a failure message from the terminating endpoint; and a processor to: generate the initial admission request for a call from a calling station to the receiving station using an H.225.0 Setup message; determine that the first call attempt associated with the initial admission request has failed responsive to receiving the failure message as an H.225.0 Release Complete message with a cause value; determine a failure cause for the first call attempt; generate a second admission request for a second call attempt from the calling station to the receiving station including a re-query indicator, the re-query indicator including a re-query counter and the failure cause, wherein the port is further to transmit the second admission request to the gatekeeper and to receive second routing information from the gatekeeper.