Patent ID: 6914898

Claim:
An IP communication interface device comprising: first and second connecting units for making it possible to dispose between a circuit switched network and LAN connected to an IP packet switched network; a first processing unit for coding first media-corresponding data as B-channel data inputted to said first connecting unit from said circuit switched network, decoding packet-disassembled media-corresponding data into which a packet of second media-corresponding data inputted to said second connecting unit from said LAN is disassembled, and for transmitting the decoded media-corresponding data to said first connecting unit for forwarding the same data as the first media-corresponding data to said circuit switched network; a second processing unit for assembling the coded media-corresponding data coded by said first processing unit into a packet, disassembling the packet of the second media-corresponding data, and transmitting the same data as packet-disassembled media-corresponding data to said first processing unit; and a third processing unit for generating the second media-corresponding data by adding predetermined header data to packet-assembled media-corresponding data assembled into a packet by said second processing unit, forwarding the second media-corresponding data to said LAN via said second connecting unit, removing the header data added to the second media-corresponding data inputted to said second connecting unit, and transmitting the second media-corresponding data with the header data removed to said second processing unit, wherein the first and second media-corresponding data include voice data transmitted from voice terminal having a voice communication function, facsimile data transmitted from a facsimile terminal having a facsimile communication function and data transmitted from a data terminal having a data communication function.