Token ring local area network testing apparatus using time delay

Details Token ring local area network testing apparatus using time delay Token ring local area network testing apparatus using time delay

1993-01-11

1995-01-10

Voeltz, Emanuel T.

Boots, shoes, and leggings

324533, G06K 700

Patent

active

053813480

ABSTRACT:
A token ring local area network (LAN) testing apparatus is provided. The apparatus utilizes time delay reflectory (TDR) in testing cable conductors that link or interconnect stations on the token ring with the token ring media access unit (MAU). In making the TDR related measurements, a directional coupler device is used in transmitting and receiving signals relative to the cable conductor. Information related to the magnitude and location of any cable conductor fault that is obtained. A TDR measurement can be used to determine the existence of a fault at the end of a cable conductor. A single matching impedance element is selected to match the impedance of the cable conductor before conducting any TDR measurement.

REFERENCES:
patent: 4739276 (1988-04-01), Graube
patent: 4943993 (1990-07-01), Fore
patent: 4970466 (1990-11-01), Bolles et al.
patent: 5046025 (1991-09-01), Harper et al.
patent: 5121342 (1992-06-01), Szymborski et al.

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