Patent ID: 7596219

Claim:
A method for setting up a call to a subscriber station comprising: receiving a first request to set up a call from a calling number to a called number of a subscriber station, the first request carrying the calling number and the called number; processing the first request at a service node and providing, from the service node, a second request to set up the call to the called number of the subscriber station, the second request including the calling number, the called number, and a non-loop parameter to indicate that call setup signaling has already occurred to the service node and thus to help avoid endless looping of call setup signaling to the service node; receiving the second request at a switch and responsively sending a service request including the non-loop parameter to a service control point; and detecting the non-loop parameter at the service control point and, in response to at least the non-loop parameter, directing the switch to set up the call to the subscriber station.