Loopback - TP-Link TL-SL5428E User Manual

Choose the menu Maintenance→Device Diagnostics→Cable Test to load the following page.
The following entries are displayed on this screen:
Cable Test

Port:
Pair:
Status:
Length:
Error:
Note:
1. The interval between two cable tests for one port must be more than 3 seconds.
2. The result is more reasonable when the cable pair is in the open status.
3. The test result is just for your reference.
4. If the port is 100Mbps and its connection status is normal, cable test can't get the length of the
cable.

15.3.2 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.
Figure 15-7 Cable Test
Select the port for cable testing.
Displays the Pair number.
Displays the connection status of the cable connected to the port. The
test results of the cable include normal, close, open or impedance.
If the connection status is normal, here displays the length range of
the cable.
If the connection status is close, open or impedance, here displays the
error length of the cable.
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