Allied Telesis AT-MCF12VF, SM - Manual (Page 30)

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6. If one or more of the F-LNK LEDs for the fiber optic ports are not lit, go to
the section “Troubleshooting” on page 21.
7. Set the Link Test switch(es) to Normal.
Note
The multichannel media converter will not pass network data when the
Link Test switch is in the Link Test position. For normal network
operations, the switch must be set to the Normal setting.
The multichannel media converter is now ready for normal network
operations. For information on operating the unit and on the LEDs, refer to
the next section, “Operating the Multichannel Media Converter.”
Operating the Multichannel Media Converter
The multichannel media converter does not require any software
configuration or software management. The status of the unit can be
determined by viewing the LEDs on the front of the unit. Table 5 lists the
functions of the power supply LEDs. Refer to Table 6 for the port LEDs.
Table 5 Power Supply and Link Test Switch LEDs
LED Color Indicates
MAIN Green
Weak or flashing
The main power supply is functioning normally.
The main power supply is failing or has failed.
BCKP Green
Weak or flashing
The optional redundant power supply, if installed, is functioning
normally.
The optional redundant power supply, if installed, is failing or
has failed.
NORM Green The unit is not performing a link test.
TEST Amber The unit is performing a link test on the fiber optic ports
associated with the Link Test switch.