Telephone system and gateway device

Details Telephone system and gateway device Telephone system and gateway device

H - Electricity

04

L

H04L 12/56 (2006.01) H04L 12/66 (2006.01) H04L 29/02 (2006.01) H04M 7/00 (2006.01) H04Q 3/00 (2006.01) H04M 3/00 (2006.01)

Patent

CA 2623064

According to one embodiment, a gateway connects a plurality of telephones to a packet network including a server processes calls using address information, comprising a registration processor requires registrations of a plurality of items of address information to be used for call origination to packet network, a table records the plurality of items of address information and results of registrations for each item of address information in packet network, a selection processor confirms the results of the registrations of the address information included in the notified request message from a transmitting origin telephone by referring to the table and selects another item of address information if the relevant address information has not been registered, and a call controller sends a message including address information if the address information included in the request message has been registered, and otherwise, including another information selected from the selection processor to the server.

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