Harvey E Marston

US Patent:

39756009, Aug 17, 1976

Filed:

Jun 6, 1975

Appl. No.:

5/584693

Inventors:

Harvey J. Marston - Burlingame CA

International Classification:

H04B 346

US Classification:

1791753A

Abstract:

Highly portable apparatus enabling locating cutting and splicing of an active circuit communications pair extending between two locations without circuit interruption is disclosed. The apparatus includes a master unit at one of the locations connected to the pair to be spliced and an alternate pair extending between the locations. A remote unit at the other location is connected to the active pair and the alternate pair. A pair identification and connection verification circuit is included for verifying the interconnection of the master unit and the remote unit to the same active pair. Manually actuated switching circuitry is included in the master unit for connecting the alternate pair to the active pair and for generating a switching signal which is transmitted to the remote unit upon manual actuation of the switch in the master unit. Automatic switching circuitry in the remote unit connects the alternate pair to the active pair in response to the switching signal. A switch inhibit guard circuit is connected to the connection verification circuit to override the manual actuated switching circuit and the automatic switching circuit if the interconnection of the master unit and the remote unit to the same active pair is not verified.