Apparatus for selecting terminal equipment in telephone lines

Details Apparatus for selecting terminal equipment in telephone lines Apparatus for selecting terminal equipment in telephone lines

1979-10-17

1982-03-23

Konick, Bernard

H04M 1106

Patent

active

043214290

ABSTRACT:
An apparatus for selectively granting priority use of telephone lines to a telephone or data transmitter each connected via the telephone lines to an exchange center. Access of the data transmitted to the exchange center is typically enabled by application of DC voltage of a predetermined polarity to the telephone lines by a control circuit. A current detection circuit is provided in series with the telephone for detecting when the telephone lines are providing current to the telephone during a time when the date transmitter is transmitting or receiving data via the telephone lines. In the event that the current detection circuit detects a current component on the telephone lines to the telephone, application of power to the data transmitter is stopped and priority use of the telephone lines is granted to the telephone.

REFERENCES:
patent: 3941939 (1976-03-01), Holmes et al.
patent: 4002837 (1977-01-01), Ebner et al.
patent: 4022977 (1977-05-01), Nomura
"Days of Decision are Here for Utility Remote Meter Reading", by Richard Martin, Pipeline and Gas Journal, Apr. 1972, pp. 23-28.

Affiliated with

Also associated with

Rating

Apparatus for selecting terminal equipment in telephone lines does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for selecting terminal equipment in telephone lines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for selecting terminal equipment in telephone lines will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1651941