Troubleshooting

❑Make sure that the twisted pair cable does not exceed 100 meters (328 feet) and that you are using a Category 3 or better cable for 10Base-T operation or a Category 5 or better cable for 100Base-TX operation.

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 bridging converter and on the end-node.

❑Check to be sure that the end-node connected to the port is operating at 100 Mbps.

❑Check to be sure that the end-nodes connected to the bridging converter are operating at the same duplex mode.

❑Make sure that the cable connected to the bridging converter’s receiver port (RX) is connected to the end-node’s transmitter port (TX) and that the bridging converter’s transmitter port (TX) is connected to the end-node’s receiver port (RX).

❑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 cables and that you have not exceeded the maximum operating distances. For the maximum operating distances, refer to Table 1 on page 4 and for the cable types, refer to Table 4 on page 15.

❑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 the fiber optic port specifications, refer to “Fiber Optic Port Specifications” on page 29.

If you are still experiencing problems after testing and troubleshooting the installation, contact Allied Telesyn Technical Support for assistance. Refer to “Contacting Allied Telesyn Technical Support” on page x or visit our web site at www.alliedtelesyn.com for support information.

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Allied Telesis AT-FS238a/2, AT-FS238b/1, AT-FS238b/2, AT-FS238a/1 manual Troubleshooting
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AT-FS238a/1, AT-FS238a/2, AT-FS238b/1, AT-FS238b/2 specifications

Allied Telesis is a renowned manufacturer specializing in networking solutions, and its AT-FS238 series of switches exemplifies the company's commitment to delivering high-quality networking hardware. The AT-FS238b/2, AT-FS238b/1, AT-FS238a/2, and AT-FS238a/1 are robust, cost-effective Ethernet switches that cater to various networking needs, including small to medium-sized enterprises and branch offices.

These switches are designed with several key features that enhance performance and reliability. One of the standout characteristics is their support for high-speed connections, with 10/100/1000 Mbps ports that ensure fast data transfer rates and efficient network operations. This high-speed capability is essential for organizations that rely on bandwidth-intensive applications.

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