User guide

Chapter 3
Device Management
RUGGEDCOM ROS
User Guide
70 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
The number of times OPEN is detected on the cable pairs of the selected port.
Short Synopsis: 0 to 65535
The number of times SHORT is detected on the cable pairs of the selected port.
Imped Synopsis: 0 to 65535
The number of times IMPEDANCE MISMATCH is detected on the cable pairs of the
selected port.