Patent ID: 7224686
Filing Date: 2007-05-29
Classification: H04Q

Abstract:
1. A method of processing a call received at a protected network from a remote network, the method comprising the steps of: receiving, at an interconnecting switch, a call to a subscriber on the protected network; selecting a trunk connecting the interconnecting switch with a remote switch; transmitting a first Initial Address Message (IAM) from the interconnecting switch to a gatekeeper platform; decoding the first IAM at the gatekeeper platform; validating the first IAM at the gatekeeper platform; updating a call state of the trunk; generating a second IAM containing call information included in said first IAM; transmitting said second IAM from the gatekeeper platform to the remote switch; validating the call at the remote switch based on the second IAM; returning a first Address Complete Message (ACM) from the remote switch to the gatekeeper platform; validating the first ACM; returning a second ACM from the gatekeeper platform to the interconnecting switch; and continuing to process subsequent ISUP messages associated with the call.