Patent ID: 8942244
Filing Date: 2015-01-27
Classification: H04L,H04N

Abstract:
1. A communication gateway comprising: a media gateway able to be connected at a first side to a data network, and able to be connected at a second, opposite, side to a Terminal Equipment (TE), wherein the TE and the media gateway are located at a same side of said data network; and a bi-directional analog signal monitor comprised within said communication gateway; wherein the bi-directional analog signal monitor is operative within said communication gateway to bi-directionally monitor contra-propagating analog signals transferred using Voice-over-Internet-Protocol (VoIP) or using Voice Band Data (VBD) protocol, and wherein the bi-directional analog signal monitor comprises: wherein, upon detection of a fax/modem/textphone analog signal in the first direction or in the second direction, the media gateway is operative, by utilizing the bi-directional analog signal monitor, to autonomously determine a call mode as either answering mode or originating mode; wherein the media gateway is (a) to autonomously perform fax/modem/textphone call discrimination based on a combination of contra-propagating analog signals in said first direction and in said second direction detected by using said bi-directional analog signal monitor autonomously not relying on signaling negotiation with another media gateway, and (b) based on said fax/modem/textphone call discrimination, to autonomously initiate a transition from (i) a protocol selected from the group consisting of VoIP and VBD, to (ii) non-voice XoIP protocol selected from the group consisting of Fax-over-Internet-Protocol (FoIP), Modem-over-Internet-Protocol (MoIP), Text-over-Internet-Protocol (ToIP).