Communication apparatus with facilities for changing to a pulse

Details Communication apparatus with facilities for changing to a pulse Communication apparatus with facilities for changing to a pulse

1988-12-29

1990-08-07

Schreyer, Stafford D.

Telephonic communications

Supervisory or control line signaling

Substation originated

H04M 131, H04M 150

Patent

active

049474235

ABSTRACT:
A communication apparatus includes a pulse dial signal generator, a tone dial signal generator, a switching circuit including a self-return switch and a self-non-return switch, for switching the pulse dial generator and the tone dial generator, a plurality of input keys such as a ten-key pad for inputting data, and a dialer circuit for switching at least one of the input keys in synchronism with an operation of the switching circuit.

REFERENCES:
patent: 4232200 (1980-11-01), Hestad et al.
patent: 4825461 (1989-04-01), Kurita et al.
patent: 4833705 (1989-05-01), Kobayashi

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