Subscriber apparatus with ringer generator for sending ringer si

Details Subscriber apparatus with ringer generator for sending ringer si Subscriber apparatus with ringer generator for sending ringer si

1992-05-06

1994-11-22

Brown, Thomas W.

Telephonic communications

Centralized switching system

With generating of call associated substation signal

379 32, 379134, 370 681, H04M 302, H04M 336, H04J 312

Patent

active

053675673

ABSTRACT:
A subscriber apparatus having working ringer generators and a standby ringer generator which is alternately used when there is a fault, wherein provision is made of a traffic monitoring unit which continuously monitors the traffic of calls terminating at the subscriber lines and a ringer switching unit which switches a working ringer generator to a standby ringer generator when it is judged that the number of the terminating calls exceeds an allowable number, whereby the apparent capacity of the working ringer generators is increased.

REFERENCES:
patent: 3601551 (1971-08-01), Weber
patent: 3767857 (1973-10-01), Colas et al.
patent: 5056135 (1991-10-01), Ahn
"Tone and Ringing Equipment BKL700", F. Vago, Ericsson Review, No. 1, 1986, pp. 18-23.

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