Patent ID: 7680960

Claim:
A method for interworking between a first signaling network and a second signaling network, wherein the method comprises: receiving, by an interworking point, a first signaling point TransFer Prohibited message from the first signaling network, wherein the first signaling network comprises a first signaling point and a signaling transfer point, and the second signaling network comprises a second signaling point, the first signaling network is connected with the second signaling network via the interworking point; wherein there are two paths from the interworking point to the first signaling point, one of which is a route to the first signaling point via the signaling transfer point, and the other is a direct route to the first signaling point; detecting, by the interworking point, all links between the interworking point and the first signaling point, if there is any interworking link, dropping the TransFer Prohibited message; if there is no interworking link, transmitting, by the interworking point, a Signaling Unavailable message to the second signaling point.