SYSTEMS AND METHODS FOR FACSIMILE ECHO CANCELLATION
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Accused Products
Abstract
The present invention is related to methods and systems for reducing or canceling echoes during fax communications. In an embodiment, during a fax call, a first fax signal from a first fax device intended for a second fax device is detected. Based at least in part on detecting the first fax signal from the first fax device or on the termination of the first fax signal, an echo audio packet is muted, wherein the echo audio packet is at least partly the result of the first fax signal being transmitted over a network, the network including at least a data network.
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Citations
67 Claims
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1-43. -43. (canceled)
- 44. A non-transitory machine-readable storage medium containing stored instructions that program a machine to monitor a network for a fax signal that is transmitted from a first fax device and is directed to a second fax device, wherein the network includes a data packet network and a circuit switched telephone network, to detect the fax signal from the first fax device, and to mute an audio packet in the network, that is directed to the first fax device, based in part on detecting the fax signal from the first fax device.
- 54. A non-transitory machine-readable storage medium containing stored instructions that program a machine to monitor a network for a fax signal that is transmitted from a first fax device and is directed to a second fax device, wherein the network includes a data packet network and a circuit switched telephone network, to detect the termination of the fax signal from the first fax device, and to mute an audio packet in the network, that is directed to the first fax device, based in part on detecting the termination of the fax signal from the first fax device.
- 63. A non-transitory machine-readable storage medium containing stored instructions that program a machine to monitor a network for a fax signal that is transmitted from a first fax device and is directed to a second fax device, wherein the network includes a data packet network and a circuit switched telephone network, to detect the fax signal from the first fax device, and to prevent an audio packet in the network, that is directed to the first fax device, from reaching the first fax device only in response to waiting a predetermined time interval following detection of the fax signal.
Specification