Multiparty subscriber loop carrier systems

Details Multiparty subscriber loop carrier systems Multiparty subscriber loop carrier systems

1978-12-29

1980-09-23

Brigance, Gerald L.

179 17A, 179 251, 179 84VF, H04J 114

Patent

active

042244765

ABSTRACT:
A subscriber loop carrier system is disclosed in which a plurality of telephone subscriber communications channels are frequency-multiplexed on a single wire pair using analog modulation techniques. Supervisory signaling for each channel is accomplished by modulating the channel carrier with a plurality of tones coded so as to represent a plurality of supervisory functions including multiparty superimposed ringing (four-party fully selective, eight-party semiselective), two-party ringing and tip party identification, and standard single party ringing, as well as off-hook and dial pulse superivision. The system is designed to be universally compatible with any of the above classes of service.

REFERENCES:
patent: 2763726 (1956-09-01), Weller
patent: 3073905 (1963-01-01), Herrig et al.
patent: 3649778 (1972-03-01), Suntop et al.
patent: 3662116 (1972-05-01), Wittman
patent: 3673330 (1972-06-01), Suntop et al.
patent: 3676602 (1972-07-01), Goetchius et al.
patent: 4048448 (1977-09-01), Canniff et al.
patent: 4056684 (1977-11-01), Brolin
patent: 4056690 (1977-11-01), Brolin et al.
"Signaling in P1 Carrier", Bell Laboratories Record, pp. 177-181, D. C. Weller and J. C. Donaldson.

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