In a communications network, voice and facsimile calls are established between first and second and second terminals via first and second media gateways in a communications network. Each gateway is capable of autonomous transitioning between a voice over IP (VoIP) call mpde and a facsimile ov er IP (FoIP)...http://www.google.com/patents/US20030193696?utm_source=gb-gplus-sharePatent US20030193696 - Voice and fax over IP call establishment in a communications network
