Allied Telesis GS950 PS V2 Series - Copper Ports

Chapter 8: Troubleshooting
92
Copper Ports
A copper port on the switch is connected to a network device, but its Link/
Activity LED is off. This indicates the port is not able to establish a link to a
network device. Try the following:
 Verify that the network device connected to the copper port is
powered on and operating properly.
 Verify that the twisted pair cable is securely connected to the port
on the media converter channel and to the port on the remote
network device.
 Verify that the port is connected to the correct twisted pair cable.
This is to confirm that the port is not connected to the wrong
network device, such as a powered-off device.
 Try connecting another network device to the copper port with a
different cable. If the copper port is able to establish a link, then the
problem is with the cable or the other network device.
 Verify that the twisted pair cable does not exceed 100 meters (328
feet).
 Verify that you are using the appropriate category of twisted pair
cable. Refer to Table 1 on page 24.
Note
1000Mbps connections may require five to ten seconds to establish
links.
Network performance between a copper port and a network device is
slow:
 Verify that the twisted pair cable does not exceed 100 meters (328
feet).
 Verify that you are using the appropriate category of twisted pair
cable. Refer to Table 1 on page 24.
 Verify that the network device supports Auto-Negotiation for speed
and duplex mode. If it does not, a speed or duplex mode mismatch
between the switch port and the network device may have
occurred. To resolve this, disable Auto-Negotiation on the switch
port and manually adjust its settings to match the settings on the
network device. Refer to the GS950 PS V2 Gigabit PoE+ Ethernet
Switch Series User Guide.