Allied Telesis AT-FS201 Installation Guide download pdf (Page 42)

Chapter 3: Troubleshooting

cable for 10Base-T operation or a Category 5 or better cable for

100Base-TX operation.

 If the twisted pair port is set to Auto-Negotiation, the end node

connected to the port should also be using Auto-Negotiation. If

the end node is not using Auto-Negotiation and has a fixed

duplex mode of full-duplex, a duplex mode mismatch will result.

To resolve this, you must disable Auto-Negotiation on the port

and adjust the speed and duplex setting manually using the DIP

switches. For further information on this, refer to “Duplex Mode”

on page 9.

 If you disabled Auto-Negotiation on the port, check to be sure that

the port is operating at the same speed and duplex mode as the

end-node.

 If you disabled Auto-Negotiation, the port is configured as MDI-X.

A crossover cable will be required if the port on the end-node is

also MDI-X.

If the LNK/ACT LED for the fiber optic port is OFF, do the following:

 Verify that the end-node connected to the port is ON and is

operating properly.

 Check that the fiber optic cable is securely connected to the fiber

optic port on the converter and on the end-node.

 Check that the end-node connected to the port is operating at

100 Mbps.

 Check that the end-nodes connected to the converter are

operating at the same duplex mode.

 Dual SC and dual ST ports consist of two separate connectors.

Each connects to a separate fiber strand. One is for receiving

data and the other is for transmitting data. When connecting a

fiber optic cable to a SC port, be sure that the receiver fiber

connector is connected to the transmitter connector on the

remote end-node, and the transmitter fiber connector is

connected to the receiver connector on the remote node.

 Test the attenuation on the fiber cable to ensure that it does not

exceed acceptable values.

 Verify that you are using the appropriate type of fiber optic cable

and that you have not exceeded the maximum operating

distances. For cable types and maximum operating distances,

refer to Table 4, “100Base-FX Fiber Optic Cabling Specifications

(Full-duplex),” on page 18.

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Allied Telesis AT-FS201 Installation Guide Page 42