Apparatus for controlling and indicating the integrity of...

Details Apparatus for controlling and indicating the integrity of... Apparatus for controlling and indicating the integrity of...

H - Electricity

04

Q

344/29, 344/1.5

H04Q 1/20 (2006.01) H04B 1/58 (2006.01) H04Q 3/54 (2006.01)

Patent

CA 1168333

TITLE APPARATUS FOR CONTROLLING AND INDICATING THE INTEGRITY OF THE CONNECTION OF TELEPHONE SUBSCRIBERS TO A SWITCHING SYSTEM ABSTRACT A system is shown for automatically detecting the integrity of telephone subscriber's line connection to a four wire switching system via a hybrid network.

393030

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