Patent ID: 6704309
Filing Date: 2004-03-09
Classification: H04L,H04M

Abstract:
An Internet telephone gateway system having an ISDN primary group as a public line network interface (I/F), comprising:a terminal function unit for an ISDN primary group network including a B-channel modulation/demodulation unit and a D-channel control unit; a network function unit for reassembling an ISDN primary group signal from a B-channel modulated/demodulated signal and a D-channel control signal to enable a primary group connection to an access server for dial-up connection; determination means for determining whether an access from a network interface user of the ISDN primary group is a request for a dial-up connection using a modem for a personal computer or a request for an Internet telephone connection from a telephone; and line switching/line sharing means comprising a network ISDN primary group interface on an Internet telephone gateway side and a D-channel control unit associated therewith and a terminal interface for the ISDN primary group network and a D-channel control unit associated therewith, and a network ISDN primary group interface on an access server side and a D-channel control unit associated therewith, wherein said Internet telephone gateway system is connected to an access server for dial-up connection through said network function unit for a dial-up connection using a modem for a personal computer, so that a line can be switched and shared between an Internet telephone and a dial-up connection using the modem for a personal computer.