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System and method for handling V.8bis signals for modem connections over packet networks
| Details |
Inventors: Brent, Jason B.; Ryan, Patrick D.;
Assignee: Mindspeed Technologies, Inc. (Newport Beach, CA)
Primary Examiner: Ton; Dang
Assistant Examiner:
Attorney, Agent or Firm: Farjami & Farjami LLP
There is provided system and method for communication over a network, which includes a first gateway and a second gateway capable of communicating with each other using a packet protocol. Each gateway is capable of communicating with a local communication device, such as a modem device, over a telephone line. In modem relay mode, each gateway is capable of detecting V.8bis signals from the communication devices, blocking such V.8bis signals, and switching to modem relay mode in response to such detection. In modem pass through mode, each gateway is capable of detecting V.8bis signals from the communication devices and switching to modem pass through mode in response to such detection. |
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DETAILED DESCRIPTION What is claimed is: 1.
A communication method for use by a first gateway device to communicate with a second gateway device over a packet network, said first gateway device capable of communicating with a communication device over a telephone line, said communication device capable of transmitting V.
8bis initiating signals having a first tone segment and a second tone segment, said method comprising the steps of: receiving a call request from said second gateway device for said communication device; placing a call to said communication device over said telephone line; enabling a tone detector for detecting said first tone segment; detecting said first tone segment transmitted from said communication device over said telephone line; and preventing, in response to said detecting step, at least one tone in said first tone segment and said second tone segment from reaching said second gateway device.
2.
The method of claim 1, wherein said communication device is a modem device.
3.
The method of claim 1, wherein said preventing step enables a filter to prevent at least one tone in said first tone segment and said second tone segment from reaching said second gateway device.
4.
The method of claim 1, wherein said first tone segment includes dual tones, and wherein said enabling step enables a single tone detector to detect one of said dual tones.
5.
The method of claim 1, wherein said first tone segment includes dual tones, and wherein said enabling step enables two tone detectors to detect both of said dual tones.
6.
The method of claim 1, wherein said step of enabling said tone detector enables said tone detector for a pre-determined period of time.
7.
The method of claim 3, wherein said first tone segment includes a dual tone, and wherein said filter includes a notch filter centered around one of said dual tones.
8.
The method of claim 3, wherein said filter includes a plurality of notch filters, and wherein each notch filter is centered around a different single tone in said second tone segment
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Multiplexer-related 
