Four-party automatic number identification circuit arrangements

Details Four-party automatic number identification circuit arrangements Four-party automatic number identification circuit arrangements

1980-05-19

1982-04-13

Brigance, Gerald L.

179 18FH, H04M 1300

Patent

active

043249531

ABSTRACT:
A station identification circuit arrangement for use with central office equipment that utilizes automatic detection equipment for the detection of one of four parties on a four party-line where a call is initiated from a preselected party's telephone without requiring access to or rewiring of the party's telephone.

REFERENCES:
patent: 3278687 (1966-10-01), Everett
patent: 3974342 (1976-08-01), Wagner
patent: 4001512 (1977-01-01), Proctor et al.
patent: 4054942 (1972-10-01), Chambers, Jr.
patent: 4079205 (1978-03-01), Glenn
patent: 4149040 (1979-04-01), Atkinson
patent: 4209667 (1980-06-01), Simokat

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