Fault isolation device

Details Fault isolation device Fault isolation device

1980-07-17

1982-03-02

Robinson, Thomas A.

H04B 346

Patent

active

043179673

ABSTRACT:
A telephone fault isolation device is installed between customer telephone equipment, such as a PBX or KSU, and telephone company trunk lines feeding into such equipment, and is used to determine whether possible trouble is in the telephone company trunk lines or in the customer equipment. The device includes a monitoring device, such as a telephone handset, and an array of switches each associated with a telephone trunk line. Each of the switches, in a normal condition, connects the trunk line to the equipment, and, in a test condition, connects the trunk line to the monitoring device. A telephone customer can switch over each of the switches in turn and determine whether he can obtain dial tone on that respective trunk line.

REFERENCES:
patent: 1750666 (1930-03-01), Glezen et al.
patent: 3514552 (1970-05-01), Smith
patent: 4197435 (1980-04-01), Jackson et al.

Affiliated with

Also associated with

Rating

Fault isolation 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 Fault isolation device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fault isolation device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-60775