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US 8,942,244 B2Granted
Circuit and method of autonomous FoIP/MoIP/ToIP call establishment
AssigneeAudioCodes Ltd.
InventorVladimir Ulybin
Life of this patent
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Abstract
Disclosed are new methods of fax-over-IP (FoIP), modem-over-IP (MoIP) or text-over-IP (ToIP) call establishment based on detecting a combination of contra-propagating signals from calling and answering terminals for autonomous connection of media gateways.
Claims18
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:
- an input signal monitor to detect within said communication gateway fax/modem/textphone analog signals in real time in a first direction being from the TE towards the media gateway, and
- an output signal monitor to detect within said communication gateway fax/modem/textphone analog signals in real time in a second direction being from a media gateway VoIP or VBD decoder towards the TE;
- 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).
5 more elements
A method of communication, wherein the method is implemented using at least a media gateway of a communication 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;
- said method comprising:
- at a bi-directional analog signal monitor associated with said media gateway, and comprised within said communication gateway and 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, detecting fax/modem/textphone analog signals in real time in a first direction being from the TE towards the media gateway, and
- detecting within said communication gateway fax/modem/textphone analog signals in real time in a second direction being from a media gateway VoIP or VBD decoder towards the TE;
- wherein, upon detection of a fax/modem/textphone analog signal in said first direction or in said second direction, the method comprises, by utilizing said bi-directional analog signal monitor, autonomously determining a call mode as either answering mode or originating mode;
- wherein the method further comprises:
- at the media gateway, (a) autonomously performing 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, autonomously initiating 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).
3 more elements
Dependencies are inferred from the claim text.