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AssigneeCisco Technology, Inc.
InventorsDavid Cheng-Song Qi, Yan Wang, Timothy G. Wade, William B. Page
Estimating the term…
A method, or corresponding apparatus, assumes a call is a Voice Band Data (VBD) call. The method disables a local echo canceller and transmits a tone that disables distal echo canceller(s) along a communications path across which the call is communicated. After disabling the echo cancellers, the echo cancellers are allowed to operate in a typical manner, such as according to ITU standards, after the call is established, including remaining disabled if the call is a Voice Band Data call and being automatically enabled if the call is or becomes a voice call. The method or apparatus is particularly useful in networks having Point of Service (POS) devices that have modems that do not send out a 2100 Hz tone to disable echo cancelling in the communications path. In one embodiment, the method or corresponding apparatus is deployed in a gateway.
A method of suppressing echo cancelling in a packet switched communications network, the method comprising:
An apparatus for suppressing echo cancelling in a packet switched communications network, the apparatus comprising:
A computer program product having a computer readable medium including computer program logic recorded thereon that, when executed on a computer processor, causes the processor to:
An apparatus for suppressing echo cancelling in a packet switched communications network, the apparatus comprising:
Dependencies are inferred from the claim text.