A call routing system for use with a wireless telephone systems is disclosed. The system, which monitors the subscriber's current physical location, determines the device to which a call should be terminated, and routes the call. The device can be any IP telephone, including a cable television system...http://www.google.ca/patents/US20030224795?utm_source=gb-gplus-sharePatent US20030224795 - Circuit switched cellular network to internet calling with internet antennas
