Switching circuit in a telephone device for selecting between tw

Details Switching circuit in a telephone device for selecting between tw Switching circuit in a telephone device for selecting between tw

1991-01-08

1993-01-05

Schreyer, Stafford D.

Telephonic communications

Terminal

Switch or switch actuator structure

379165, 379376, H04M 164, H04M 906

Patent

active

051777835

ABSTRACT:
In a telephone answering machine, means are provided for selecting one of three operating modes. In mode 1, the answering machine answers telephone calls connected via the tip and ring terminals, and does not place a low impedance across the A and A1 terminals. In mode 2, the answering machine answers calls connected via the tip and ring terminals, and places a low impedance across the A and A1 terminals. In mode 3, the answering machine answers telephone calls connected via the A and A1 terminals.

REFERENCES:
patent: 3419684 (1968-12-01), Lord et al.
Advertisements for telephone answering machines having capability of answering two telephone lines--these machines are: the Panasonic KX-T2740, AT&T model 1532 & AT&T model 1332.

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