Chapter 3
Device Management
RUGGEDCOM ROS
User Guide
80 Viewing Cable Diagnostics Results
Figure31:Cable Diagnostics Parameters Table
This table displays the following information:
Parameter Description
Port Synopsis:  1 to maximum port number
The port number as seen on the front plate silkscreen of the switch.
State Synopsis:  { Stopped, Started }
Control the start/stop of the cable diagnostics on the selected port.
If a port does not support cable diagnostics, State will be reported as
N/A.
Runs Synopsis:  0 to 65535
The total number of times cable diagnostics to be performed on the
selected port. If this number is set to 0, cable diagnostics will be
performed forever on the selected port.
Calib. Synopsis:  -100.0 to 100.0 m
This calibration value can be used to adjust or calibrate the estimated
distance to fault. User can take following steps to calibrate the cable
diagnostics estimated distance to fault:
• Pick a particular port which calibration is needed
• Connect an Ethernet cable with a known length (e.g. 50m) to the
port
• DO NOT connect the other end of the cable to any link partner
• Run cable diagnostics a few times on the port. OPEN fault should
be detected
• Find the average distance to the OPEN fault recorded in the log
and compare it to the known length of the cable. The difference
can be used as the calibration value
• Enter the calibration value and run cable diagnostics a few more
times
• The distance to OPEN fault should now be at similar distance as
the cable length
• Distance to fault for the selected port is now calibrated
Good Synopsis:  0 to 65535
The number of times GOOD TERMINATION (no fault) is detected on
the cable pairs of the selected port.
Open Synopsis:  0 to 65535
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