Patent ID: 6690304
Filing Date: 2004-02-10
Classification: H04L,H04N,H04Q

Abstract:
A protocol conversion apparatus, connected between a calling side communication terminal and a called side communication terminal, for performing protocol conversion between different communication protocols used by the calling side communication terminal and the called side communication terminal, the protocol conversion apparatus comprising:a protocol conversion unit for performing protocol conversion between a calling side protocol used by the calling side communication terminal and a called side protocol used by the called side communication terminal; a signal detect unit for detecting a connectivity confirmation signal transmitted between the calling side communication terminal and the called side communication terminal; and a control unit for specifying the calling side protocol to be used by the calling side communication terminal and the called side protocol to be used by the called side communication terminal based on the connectivity confirmation signal detected by the signal detect unit; wherein the protocol conversion unit can perform a plurality of different protocol conversions between different specific protocols used by calling side communication terminals and by called side communication terminals, wherein the control unit selects one protocol conversion from the plurality of protocol conversions capable of being performed by the protocol conversion unit, based on the calling side protocol specified by the control unit to be used by the calling side communication apparatus and the called side protocol specified by the control unit to be used by the called side communication apparatus, and wherein the protocol conversion unit performs the protocol conversion selected by the control unit.