Allied Telesis AT-GS950/16PS Installation Guide download pdf (Page 56)

Chapter 3: Troubleshooting

powered on and is 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 eliminate the possibility that the port is connected to the

wrong network device, such as a powered off device.

 Try connecting another network device to the twisted pair port with

a different cable. If the twisted pair 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: Category 3 or better for 10 Mbps operation and Category 5

and Category 5E for 100 and 1000 Mbps operation.

Note

A 1000Base connection may require five to ten seconds to establish

a link.

Problem 4: The LINK/ACT LED for an SFP transceiver is off.

Solutions: The fiber optic port on the transceiver is unable to establish a

link to a network device. Try the following:

 Verify that the network device connected to the fiber optic port is

operating properly.

 Verify that the fiber optic cable is securely connected to the port on

the media converter channel and to the port on the remote network

device.

 Check that the SFP module is fully inserted in the slot.

 Verify that the operating specifications of the fiber optic ports on

the SFP transceiver and the remote network device are

compatible.

 Verify that the correct type of fiber optic cabling is being used.

 Verify that the port is connected to the correct fiber optic cable.

This is to eliminate the possibility that the port is connected to the

wrong remote network device, such as a powered off device.

 Try connecting another network device to the fiber optic port using

a different cable. If the port is able to establish a link, then the

problem is with the cable or with the other network device.

 Use the switch’s management software to verify that the port is

enabled.

 If the remote network device is a management device, use its

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Allied Telesis AT-GS950/16PS Installation Guide Page 56