Telephone system circuitry for discriminating between voice and

Details Telephone system circuitry for discriminating between voice and Telephone system circuitry for discriminating between voice and

1995-10-26

1998-01-06

Hong, Harry S.

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

379 9305, 379 9335, 379215, 379399, H04M 1100, H04M 342

Patent

active

057063362

ABSTRACT:
A selective call-waiting system for telephony use samples transmission on a busy line if the line subscribes to the selective call-waiting service, and avoids interrupting the transmission with a call-waiting signal if the transmission is data-type. If the transmission on the busy line subscribing to the selective call-waiting service is voice-type, the system sends a call-waiting signal. Signal analyzers are disclosed, as well as methods for practicing the invention.

REFERENCES:
patent: 4310727 (1982-01-01), Lawser
patent: 4757496 (1988-07-01), Bartholet et al.
patent: 5267301 (1993-11-01), Nishii
patent: 5287401 (1994-02-01), Lin
patent: 5428608 (1995-06-01), Freeman et al.
patent: 5479498 (1995-12-01), Brandman et al.
patent: 5491744 (1996-02-01), Kikinis

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