Allied Telesis AT-FS201ST/FS3 Installation Guide download pdf (Page 22)

4. Check the two LNK LEDs. They should be green, indicating that the

media converter is receiving a signal from the nodes connected to the

ports. If a LNK LED is not green, check the following:

— The node connected to the port is powered ON.

— The fiber optic cable is securely connected to the fiber optic port.

— The appropriate type of fiber optic cable for the port is being used. Refer

to Table 3 through Table 5 for cable specifications.

— The maximum allowable loss budget for the fiber optic cable has not

been exceeded.

5. If the two LNK LEDs are green but there is a communication problem

between the nodes connected to the media converter (and you are not

running a link test), check the following:

— The nodes connected to the ports are operating at 100 Mbps.

— The nodes connected to the media converter are operating in the same

duplex mode. The media converter is transparent to the duplex mode.

— The Link Test/MissingLink button on the media converter is in the

M/L ON (IN) position.

— Check that the maximum allowable loss budget for the fiber optic cable

has not been exceeded.

6. Set the Link Test/MissingLink button on the media converter to M/L ON

(IN) position. The M/L ON position activates the MissingLink feature on

the media converter.

Note

When operating two media converters in a back-to-back configuration, it

is recommended that the MissingLink feature on one or both of the

converters be disabled. The MissingLink feature can be disabled by

placing the LNK TST to the OUT position. Disabling the MissingLink

feature does not interfere with the converter’s ability to pass network

traffic.

If you are still experiencing problems after testing the installation, contact

Allied Telesyn Technical Support. Technical support is offered online,

telephone, fax or e-mail.

Refer to “Contacting Allied Telesyn Technical Support” on page viii or visit our

web site at

www.alliedtelesyn.com

for support information.

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Allied Telesis AT-FS201ST/FS3 Installation Guide Page 22