Troubleshooting
32
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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 8.
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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.
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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 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.
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Check that the fiber optic cable is securely connected to the fiber optic
port on the bridging converter and on the end-node.
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SC ports consist of two separate connectors, as shown in Figure 10 on
page 23. 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.
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Test the attenuation on the fiber cable to ensure that it does not
exceed acceptable values.
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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 on
page 17.
❑
Check that the operating specifications of the fiber optic port on the
end-node are compatible with the operating specifications of the fiber
optic port on the bridging converter. For fiber optic port specifications,
refer to “Fiber Optic Port Specifications” on page 37.
