Four-party automatic number identification circuit arrangements

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

H - Electricity

04

M

379/45

H04M 13/00 (2006.01)

Patent

CA 1176770

ABSTRACT A station identification circuit arrange- ment for use with central office equipment that utilizes automatic detection equipment for the de- tection 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,

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