公开(公告)号：CA1222800A

公开(公告)日：1987-06-09

申请号：CA455136

申请日：1984-05-25

Applicant: IBM

Inventor： ANNUNZIATA EUGENE J ,  STAMMELY THOMAS E

IPC: G01R31/02 ,  G01R31/04 ,  H04L1/00

Abstract: TERMINAL DISCONNECT AND MEDIA WIRE FAULT DETECT MECHANISM A device, method and system for testing in situ the wiring of a ring or similar type local area network having a loop conduction path with a plurality of data terminal equipment (DTE) coupled to said loop conduction path. The DTE is provided with a mechanism for generating a d.c. current. The d.c. current flows from the DTE through a length of interconnecting conductors and self-shorting connectors into the loop conduction path. A current measuring device monitors the current at the interconnecting conductors for imbalance current flow and/or over current. The presence of either a current imbalance and/or over current indicates a malfunctioning (short circuit, broken wire, etc.) in the wiring.

公开(公告)号：CA783237A

公开(公告)日：1968-04-16

申请号：CA783237D

Applicant: IBM

Inventor： KING LEWIS E ,  ANNUNZIATA EUGENE J ,  HOSKINSON WILLIAM C