Ring scheduling apparatus for a digital multiplexed telecommunic

Details Ring scheduling apparatus for a digital multiplexed telecommunic Ring scheduling apparatus for a digital multiplexed telecommunic

1980-11-05

1983-09-20

Brown, Thomas W.

Multiplex communications

Wide area network

Packet switching

179 17E, 179 18HB, 3701101, H04J 312, H04M 302, H04Q 508

Patent

active

044060041

ABSTRACT:
A ring scheduling apparatus for use in a digital multiplexed telephone communication system. The apparatus utilizes a controller which sorts messages indicating which telephone lines are being rung and what frequency and DC signal level are required to ring the lines. The messages are sorted into voltage and frequency compatible groups, and then digital data is sent to a ring signal generating circuit to control the frequency of the ring signal generated and the polarity of the DC signal upon which the ring signal is superimposed. Disclosure of a multiplexer and line interface circuitry for use in this system is included as well as a self-test circuit for testing the audio circuitry of idle telephone lines.

REFERENCES:
patent: 3767857 (1973-10-01), Colas et al.
patent: 3978292 (1976-08-01), Hill et al.
patent: 4048448 (1977-09-01), Canniff et al.
patent: 4079210 (1978-03-01), Sanderson
patent: 4081613 (1978-03-01), Reines et al.
patent: 4140877 (1979-02-01), Joslow et al.
patent: 4161633 (1979-07-01), Treiber
patent: 4192007 (1980-03-01), Becker
patent: 4270028 (1981-05-01), Young
patent: 4273964 (1981-06-01), Szpindel
patent: 4282410 (1981-08-01), Gauthier et al.
"Study of a Rural Digital End Office", M. J. Kelly, GTE Automatic Electric Journal, May 1977, pp. 294-302.
"Applications for Programmable Ringing Generators", by D. J. Becker, INTELEC 78, International Telephone Energy Conference (Washington, D.C.), Oct. 25-27, 1978, Conf. Record, pp. 292-298.

Affiliated with

Also associated with

Rating

Ring scheduling apparatus for a digital multiplexed telecommunic does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ring scheduling apparatus for a digital multiplexed telecommunic, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ring scheduling apparatus for a digital multiplexed telecommunic will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-591193