User Manual

Monitor the System
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M4200 and M4300 Series ProSAFE Managed Switches Web Management User Manual
5. Select Monitoring > Ports > Cable Test.
6. Use one of the following methods to select a port:
• In the Go To Port field, enter the interface in the unit/slot/port format and click on the
Go button.
• Next to the Port column, select the check box for the port that you want to test.
7. Click the Apply button.
A cable test is performed on the selected interface. The cable test might take up to two
seconds to complete. If the port has an active link, the cable status is always Normal. The
command returns a cable length estimate if this feature is supported by the PHY for the
current link speed. Note that if the link is down and a cable is attached to a 10/100
Ethernet adapter then the cable status might be Open or Short because some Ethernet
adapters leave unused wire pairs unterminated or grounded.
The following table describes the nonconfigurable information displayed on the page.
Table 221. Cable Test
Field Description
Cable Status This displays the cable status as Normal, Open or Short.
• Normal: the cable is working correctly.
• Open: the cable is disconnected or there is a faulty connector.
• Short: there is an electrical short in the cable.
• Cable Test Failed: The cable status could not be determined. The cable
might in fact be working.
• Untested: The cable is not yet tested.
• Invalid cable type: The cable type is unsupported.
Cable Length The estimated length of the cable in meters. The length is displayed as a
range between the shortest estimated length and the longest estimated
length. Unknown is displayed if the cable length could not be determined.
The Cable Length is only displayed if the cable status is Normal.
Failure Location The estimated distance in meters from the end of the cable to the failure
location. The failure location is only displayed if the cable status is Open or
Short.