Portable testing device for monitoring communication line...

Details Portable testing device for monitoring communication line... Portable testing device for monitoring communication line...

H - Electricity

04

L

340/71

H04L 12/26 (2006.01)

Patent

CA 1250034

PORTABLE TESTING DEVICE FOR MONITORING COMMUNICATION LINE ACTIVITY Abstract of the Disclosure This invention relates to a portable testing device which is used in a system having a host termi- nal, a plurality of secondary terminals, and a commu- nication line interconnecting the host and secondary terminals for in-house communication. The transmis- sion line includes a transmit line pair, a receive line pair, and a ground line. The testing device is operated in one of three modes which are selected via a switch on the device. The three modes of operation are: 1) Monitoring the transmit lines from the host and secondary terminals; 2) Performing "turn-around" functions with the host or secondary terminals; and 3) Performing "turn-around and load testing" with the host or secondary terminals.

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