GATEWAY DEVICE AND CALL-CONNECTION CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To provide a gateway device proper to a connection between a wide-area IP network and a public-telephone exchange network in which diversified communication protocols coexist, and a call-connection control method using the wide-area IP network connecting terminal as the object.

SOLUTION: The gateway device has a plurality of communication protocol processing functions (13) and a starting control function (12) for a communication protocol processing. In the gateway device, a plurality of the communication protocol processings are carried out successively or at a stretch, a communication protocol adapted at a terminating terminal is specified from the result of a communication with a control server by each communication protocol processing, and a call connection processing is carried out.

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