Multifrequency tone distribution using a conferencing arrangemen

Details Multifrequency tone distribution using a conferencing arrangemen Multifrequency tone distribution using a conferencing arrangemen

1983-09-15

1985-08-13

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 62, 370 89, 3701103, H04J 312, H04J 316

Patent

active

045354545

ABSTRACT:
There is disclosed a multifrequency tone distribution arrangement for a communication system having a common time division multiplexed bus in which digital samples of tone frequencies are supplied from a central signal generating circuit to system port circuits via selected time slots. Each port circuit automatically accepts selected signals from the common bus for conferencing to produce multifrequency digit tones and service tones.

REFERENCES:
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patent: 4125877 (1978-12-01), Reinert
patent: 4211895 (1980-07-01), Davis et al.
patent: 4227248 (1980-10-01), Munter
patent: 4327436 (1982-04-01), Ohara et al.
patent: 4389720 (1983-06-01), Baxter et al.
patent: 4393496 (1983-07-01), Zeitraeg
patent: 4399535 (1983-08-01), Southard
patent: 4460806 (1984-07-01), Canniff et al.
patent: 4475189 (1984-10-01), Herr et al.

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