Voice/facsimile/modem call discrimination method for voice over packet networks
First Claim
1. A method of discriminating voice, data, and facsimile calls communicated through a voice-over-packet network, comprising:
- providing an originating-side gateway, connected between an originating-side modem and a packet network;
providing an answering-side gateway, connected between an answering-side modem and the packet network;
identifying the existence of an answer signal (ANS) or a modified answer signal (ANSam) communicated between the answering modem and the originating modem over said packet network;
generating an ANS tone according to the protocols of said originating modem, using an originating-side gateway, when said existence of said ANS signal is identified by said answering-side gateway;
generating an ANSam tone according to the protocols of said originating modem, using said originating-side gateway, when said existence of said ANSam signal is identified by said answering-side gateway;
enabling a V.8 call menu signal (CM) detector after said existence of either of said ANS or ANSam signals is identified by said originating gateway;
transitioning said originating gateway from a voice mode of operation to a voice pass-through mode of operation after said existence of either of said ANS or ANSam signals is identified by said originating gateway;
if the originating gateway detects a V.8 CM signal from the originating modem prior to expiration of the ANS or ANSam signals, then;
identifying, by the originating gateway, the CM call function as either a data modem CM signal from the originating modem or a facsimile CM signal from the originating modem; and
if the CM call function is the data modem CM signal, transitioning the originating gateway into an LLMR processing state if the CM call function is the data modem CM signal, and if the CM call function is the facsimile CM signal, preparing the originating modem to support a V.34 facsimile protocol and transitioning the originating gateway to support the V.34 facsimile protocol in one of the voice pass-through mode and a V.34 facsimile relay mode.
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Accused Products
Abstract
A method of discriminating voice, data, and facsimile calls communicated through a voice-over-packet network. The gateway 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 and an originating modem over a packet network during a voice state call. The originating gateway can generate an ANS tone according to the protocols of the originating modem, using an originating-side gateway, when the existence of the ANS signal is identified by the receiving-side gateway. 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.
247 Citations
13 Claims
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1. A method of discriminating voice, data, and facsimile calls communicated through a voice-over-packet network, comprising:
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providing an originating-side gateway, connected between an originating-side modem and a packet network; providing an answering-side gateway, connected between an answering-side modem and the packet network; identifying the existence of an answer signal (ANS) or a modified answer signal (ANSam) communicated between the answering modem and the originating modem over said packet network; generating an ANS tone according to the protocols of said originating modem, using an originating-side gateway, when said existence of said ANS signal is identified by said answering-side gateway; generating an ANSam tone according to the protocols of said originating modem, using said originating-side gateway, when said existence of said ANSam signal is identified by said answering-side gateway; enabling a V.8 call menu signal (CM) detector after said existence of either of said ANS or ANSam signals is identified by said originating gateway; transitioning said originating gateway from a voice mode of operation to a voice pass-through mode of operation after said existence of either of said ANS or ANSam signals is identified by said originating gateway; if the originating gateway detects a V.8 CM signal from the originating modem prior to expiration of the ANS or ANSam signals, then; identifying, by the originating gateway, the CM call function as either a data modem CM signal from the originating modem or a facsimile CM signal from the originating modem; and if the CM call function is the data modem CM signal, transitioning the originating gateway into an LLMR processing state if the CM call function is the data modem CM signal, and if the CM call function is the facsimile CM signal, preparing the originating modem to support a V.34 facsimile protocol and transitioning the originating gateway to support the V.34 facsimile protocol in one of the voice pass-through mode and a V.34 facsimile relay mode. - View Dependent Claims (2)
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3. A method of discriminating voice, data, and facsimile calls communicated through a voice-over-packet network, comprising:
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providing an originating-side gateway, connected between an originating-side modem and a packet network; providing an answering-side gateway, connected between an answering-side modem and the packet network; identifying any one of an answer signal (ANS), a modified answer signal (ANSam), a V.8bis CRe/MRe tone, or V.21 flags communicated between answering modem and the originating modem, using the answering-side gateway that is capable of identifying each of said ANS signal, said ANSam signal, said V.8bis CRe/MRe tone, and said V.21 flags; with said answering-side gateway, converting said identified ANS signal, ANSam signal, V.8bis CRe/MRe tone, or V.21 flags to a format that may be conveyed over said packet network to said originating modem via the originating-side gateway; suppressing a voice path to said packet network, using said answering gateway, when said V.8bis CRe/MRe tone is identified; determining when said V.8bis CRe/MRe tone communication between said answering modem and said originating modem terminates; re-establishing said voice path when said V.8bis CRe/MRe tone terminates; suppressing said voice path to said packet network, using said answering gateway, when said ANS signal or said ANSam signal is detected; transitioning said answering gateway to a voice pass-through mode of operation when said ANS signal or said ANSam signal is detected; transitioning said answering gateway to a data mode using an LLMR processing operation when an LLMR indication is received from the originating-side gateway; transitioning said answering gateway to a V.34 facsimile processing mode of operation when said V.34 facsimile relay indication is received from the originating-side gateway; re-establishing said voice path to said packet network, using said answering gateway, when a termination of the communication of either of said ANS or ANSam signals occurs; and transitioning said answering gateway to a facsimile relay processing mode of operation when said V.21 flags are identified.
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4. A system, comprising:
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a call-originating modem; a call-originating gateway, connected between the call-originating modem and a packet network; and a call-answering gateway, connected between a call-answering modem and the packet network, wherein the system discriminates between one of a voice mode, a facsimile mode, and a data mode of operation between the originating modem and the answering modem over the packet network using an ANS/ANSam tone from the answering gateway and V.8 call menu (CM) signal from the originating modem, the originating modem establishes a voice call to the answering modem and the originating gateway and the answering gateway enter the voice mode of operation, when an ANS/ANSam (ANS) tone indication is received by the originating gateway from the answering modem via the answering gateway, the originating gateway generates an ANS tone to the originating modem, enables a V.8 CM detector, and when the originating gateway, in voice mode, detects a V.8 CM synchronization sequence from the originating modem, the originating gateway suppresses the voice path to the packet network and decodes V.8 CM from originating modem to determine whether to transition to a facsimile mode or a data mode from the voice mode. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification