Transparent inband signaling

Details Transparent inband signaling Transparent inband signaling

1991-07-29

1993-11-30

Dwyer, James L.

Telephonic communications

Plural exchange network or interconnection

Interexchange signalling

379234, 379202, 379212, H04M 358, H04M 356

Patent

active

052673057

ABSTRACT:
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 general 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, muting the inband signal to prevent the other party from hearing it, and determining which party generated it while allowing the conversation to continue substantially uninterrupted. The inband signal is delayed prior to muting for a short period of time in an alternate embodiment in order to compensate for the time delay in reliably detecting DTMF signals thus mute the inband signal more completely.

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