Patent ID: 7003287

Claim:
A system for call forwarding, comprising: a telephone subsystem operable to communicate with a telephonic device; a wireless subsystem operable to: communicate with a mobile station, the mobile station associated with the telephonic device; register the mobile station; and a packet subsystem operable to transport packets and coupled to the telephone subsystem and the wireless subsystem, the packet subsystem further operable to: determine that the mobile station has registered with the wireless subsystem; and provide an instruction to the telephone subsystem in response to determining that the mobile station has registered with the wireless subsystem; the telephone system further operable to: receive the instruction from the packet subsystem; and in response to receiving the instruction, forward a telephone call directed at the telephonic device to the packet subsystem, the forwarding triggered by the mobile station registering with the wireless subsystem; and the packet subsystem further operable to: communicate the telephone call to the wireless subsystem for delivery to the mobile station; determine that the mobile station has deregistered with the wireless subsystem; and provide a second instruction to the telephone subsystem in response to determining that the mobile station has deregistered with the wireless subsystem, the second instruction instructing the telephone system to forward a telephone call directed at the mobile station to the telephonic device, the forwarding triggered by the mobile station deregistering with the wireless subsystem.