Transparent inband signaling

Details Transparent inband signaling Transparent inband signaling

H - Electricity

04

M

H04M 3/00 (2006.01) H04M 3/42 (2006.01) H04M 3/51 (2006.01) H04M 7/00 (2006.01) H04M 3/428 (2006.01) H04Q 1/45 (2006.01) H04Q 1/46 (2006.01)

Patent

CA 2114435

2114435 9303570 PCTABS00020 A method and apparatus for transparent inband signaling during a telephone conversation provides an advantageous way of enabling a party to a telephone conversation to signal a telecommunications system to perform desired functions. A person signaling a system with a generated inband signal, such as DTMF, can do so transparently, that is without the other party hearing the inband signals used. This innovation is based on detecting the inband signal (65A) muting the inband signal (65C) to prevent the other part from hearing it, and determining which party generated it while allowing the conversation to continue substantially uninterrupted. In an alternate method and apparatus, the inband signal is delayed (71A) for a short period of time in order to compensate for the time delay in reliably detecting DTMF signals and thus mute the inband signal more completely.

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