Allied Telesis AT-MC16 - Manual (Page 15)

AT-MC1x Series Installation Guide
5
Fiber Link Test Switch
The AT-MC13, AT-MC14, and AT-MC16 media converters feature a Fiber Link
Test switch. This switch sets the fiber port into an artificial link transmission
state for testing without the twisted pair port being connected. When the Fiber
Link Test switch is in the DOWN (default) position, the NML LED is green
indicating that the media converter is functioning normally. For a link test, set
the switch in the UP position. Be sure to set the switch back to the default
position after performing a link test. If the switch is left in the UP position, the
media converter will not function properly. Refer to Figure 2 for the location of
the Fiber Link Test switch.
Figure 2 Fiber Link Test Switch
10Base-F
REC
LNK
TX RX
MC13 ETHERNET MEDIA CONVERTER
MDI MDI-X
10Base-T
REC
LNK
PWR
NML
FIBER
LINK TEST
FIBER
LINK TEST