Mitsubishi Denki Kabushiki Kaisha

Syuuji Itou

Yoshihiko Shirokura

A control unit ( ) sets up a path in a protocol conversion apparatus ( ) based on call setting information from the calling side terminal. A signal monitor unit ( ) monitors main data transmitted in the path and sent/received between the terminals. When a specific connectivity confirmation sequence is detected by the signal monitor unit ( ), the result is forwarded to the control unit ( ). Based on the forwarded result, the control unit ( ) specifies a protocol of the calling side terminal and a protocol of the called side terminal. A protocol conversion unit ( ) performs the most suitable protocol conversion based on the specified protocols.

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Tokyo, Japan

Syuuji Itou