Alarm circuit interface units

Details Alarm circuit interface units Alarm circuit interface units

1982-05-03

1985-02-12

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular coupling link

340505, 340506, 340518, 340534, 34082505, 34082503, 179 5R, G08B 100, H04M 1104

Patent

active

044994559

ABSTRACT:
Bidirectional communications between an alarm loop, comprising one or more alarm transmitters, and a remote receiver is provided through a digital transmission facility by a pair of interface units (201,301). Each interface unit, disposed at an end of the digital transmission facilities, provides encoding and decoding of signals to and from the alarm receiver. For greater reliability, each interface unit (601,701) can be adapted to select signals received from different digital transmission facilities.

REFERENCES:
patent: 3715725 (1973-02-01), Kievit et al.
patent: 3927404 (1975-12-01), Cooper
patent: 4103337 (1978-07-01), Whiteside
patent: 4162488 (1979-07-01), Silverman et al.
patent: 4311986 (1982-01-01), Yee

Affiliated with

Also associated with

Rating

Alarm circuit interface units does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1392135