Subscriber monitoring unit for electronic telephone exchanges

Details Subscriber monitoring unit for electronic telephone exchanges Subscriber monitoring unit for electronic telephone exchanges

1976-07-27

1977-07-12

Olms, Doulgas W.

179 18F, H04M 322

Patent

active

040355926

ABSTRACT:
The monitoring peripheral equipment is intended to inform the exchange's central unit about the state and nature of the subscriber's receiver and it comprises: a circuit sensing the positions of the relays of the line equipment, a memory unit, an internal logic with a scanner thereof, a liaison circuit logic and a line equipment monitoring device, whereby the lifting of a subscriber's receiver is detected, the information is sent to the internal logic as regards the location, state and processing to be performed, said central unit calls back said liaison circuit logic and the internal logic sets the subscriber's telephone in the connected position.

REFERENCES:
patent: 3136863 (1964-06-01), Melvin
patent: 3524933 (1970-08-01), Risky
patent: 3560655 (1971-02-01), Lucas
patent: 3562436 (1971-02-01), Lutgenau
patent: 3673340 (1972-06-01), Casella et al.
patent: 3697701 (1972-10-01), Greason et al.
patent: 3740485 (1973-06-01), Nickerson
patent: 3770899 (1973-11-01), Kobus et al.
patent: 3920934 (1975-11-01), Moorehead

Affiliated with

Also associated with

Rating

Subscriber monitoring unit for electronic telephone exchanges does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Subscriber monitoring unit for electronic telephone exchanges, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Subscriber monitoring unit for electronic telephone exchanges will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-489218