LevelOne GES-1651 - Manual (Page 119)

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Figure 11-7 Cable Test
The following entries are displayed on this screen:
 Cable Test
Port: Select the port for cable testing.
Pair: Displays the Pair number.
Status: Displays the connection status of the cable connected to the port. The
test results of the cable include normal, close, open or impedance.
Length: If the connection status is normal, here displays the length range of
the cable.
Error: If the connection status is close, open or impedance, here displays the
error length of the cable.
Note:
1. The Length displayed here is the length of pair cable not that of the physical cable.
2. The test result is just for your reference.
11.3.2 Loopback
Loopback test function, looping the sender and the receiver of the signal, is used to test whether
the port of the switch is available as well as to check and analyze the physical connection status of
the port to help you locate and solve network malfunctions.
Choose the menu Maintenance →Device Diagnostics→Loopback to load the following page.