Programmable ring signal generator

Details Programmable ring signal generator Programmable ring signal generator

1980-03-31

1982-09-14

Brown, Thomas W.

179 51AA, H04M 302, H04M 1902

Patent

active

043497039

ABSTRACT:
The present invention comprehends an improved ringing circuit particularly suitable for digital telecommunications systems wherein the energizing and de-energizing of the ring circuitry is programmably controlled to provide for either hardware or software generation of ringing cadence, dc bias polarity, dry-switching of ring relays, and other signaling voltages. Further in accordance with the invention, a digital implementation of a complete ringing circuit is achieved without the use of bulky transformers.

REFERENCES:
patent: 3443033 (1969-05-01), Louis
patent: 3978292 (1976-08-01), Hill et al.
patent: 4075430 (1978-02-01), Reines
patent: 4270028 (1981-05-01), Young

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