Telephone system allowing hold releasing request from central of

Details Telephone system allowing hold releasing request from central of Telephone system allowing hold releasing request from central of

1988-01-27

1989-07-25

Dwyer, James L.

Telephonic communications

Substation or terminal circuitry

Hold circuit

379162, 379163, H04M 100

Patent

active

048521582

ABSTRACT:
A telephone system which allows external releasing of a holding state set by a holding operation of a telephone set. A signal receiving circuit of the system receives a holding-state releasing signal such as a DTMF signal or the like sent from a central office line to release the hold state of the telephone set on the basis of an output of the circuit.

REFERENCES:
patent: 4425479 (1984-01-01), Dubner et al.

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