A Voice/Facsimile/Modem Call Discrimination Method For Voice Over Packet Networks

摘要

A method of discriminating voice, data, and facsimile calls communicated through a voice-over-packet network. The gateway (2) is provided with software which can identify the existence of an answer signal (ANS) or a modified answer signal (ANSam) communicated between an answering modem (4) and an originating modem (1) over a packet network (5) during a voice state call. The originating gateway (2) can generate an ANS tone according to the protocols of the originating modem (1), using an originating-side gateway (2), when the existence of the ANS signal is identified by the receiving-side gateway (3). The originating gateway also generates an ANSam tone according to the protocols of the originating modem, using the originating-side gateway, when the existence of the ANSam signal is identified by the receiving-side gateway.