Allied Telesis AT-MC1001SC/GS4 - Manual (Page 14)

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Figure 2 Link Test and Topology Features
Link Test/MissingLink Switch
The Link Test/MissingLink switch (see Figure 2) allows you to perform a link
test on the ports on the media converter. This switch also allows you to
activate the MissingLink feature on the unit. Both features are described in
this section.
Link Test. The link test is a fast and easy way for you to test the connections
between the ports on the media converter and the nodes that are connected to
the ports. If a network problem occurs, you can perform a link test to
determine which port is experiencing a problem, and so be able to identify the
fiber optic cable and node where the problem resides.
A link test is performed when the switch is in the LNK TST (UP) position. For
instructions on performing a link test, refer to “Testing and Troubleshooting
the Media Converter” on page 15.
Caution
The media converter will not pass network traffic when a link test is
being performed, thus possibly disrupting network operation. Only when
the Link Test switch is in the M/L ON (DOWN) position will the media
converter pass network traffic.
SINGLE MODE MULTI MODE
LNK
LNK TST
M/L ON
LNK
PWR
M/L ON
TX RX
MC1001SC/GS2 GIGABIT ETHERNET MEDIA CONVERTER
STAD
ALOE
LK TST
LK TST
BACK TO BACK
CLASS 1
LASER PRODUCT
DO NOT STARE
INTO BEAM
1000Base-LX TX RX 1000Base-SX
Link Test/MissingLink Switch
Link Test Standalone/Back to Back Button