Apparatus having a dial calling function

Details Apparatus having a dial calling function Apparatus having a dial calling function

1985-12-23

1988-05-31

Dwyer, James L.

Telephonic communications

Supervisory or control line signaling

Substation originated

379100, 379387, H04M 1100

Patent

active

047486627

ABSTRACT:
An apparatus having dial calling device which effects a call to an apparatus of a destination office by sending out a selection signal based on a telephone number to office lines. After a calling operation request is issued from the dial calling device, the calling operation is inhibited at least during an off period of a call signal.

REFERENCES:
patent: 4087638 (1978-05-01), Hayes et al.
patent: 4535198 (1985-08-01), Squicciarini

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