Terminal connection device

Details Terminal connection device Terminal connection device

1991-07-01

1993-10-12

Dwyer, James L.

Telephonic communications

Supervisory or control line signaling

Signal reception at substation

379179, 379372, 379180, H04M 1300

Patent

active

052532895

ABSTRACT:
A terminal connection device changes and connects a plurality of terminals to one telephone line according to kinds of ringing signal sequences sent through the telephone line. The terminal connection device comprises switches connecting between the telephone line and the terminals, a control circuit commanding ON/OFF operation of the switches, and a photo coupler converting the ringing signal obtained through the telephone line into light signal and inputting the light signal to the control circuit. The control circuit includes a device for judging as to whether a ringing signal sequence sent through the telephone line is the same as the sequence data or not.

REFERENCES:
patent: 4146754 (1979-03-01), Rose
patent: 4701949 (1987-10-01), Lynch et al.
patent: 4720853 (1988-01-01), Szlam
patent: 4723271 (1988-02-01), Grundtisch
patent: 4935958 (1990-06-01), Morganstein et al.
patent: 4959853 (1990-09-01), Del Monte et al.
patent: 4998273 (1991-03-01), Nichols
patent: 5062133 (1991-10-01), Melrose
patent: 5073922 (1991-12-01), Okada

Affiliated with

Also associated with

Rating

Terminal connection device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Terminal connection device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Terminal connection device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1911999