Allied Telesis AT-MMC200/LC, Installation Manual

Page: 34 / 66

Chapter 1: Overview
34
Missing Link (ML)
The MMC2000/200 V3 series media converters offer the Missing Link
(ML), which is intended for use when the V2 media converter is connected
standalone between a fiber endpoint and copper endpoint.
Note
To find out whether your device is V2 or V3, see “Differences
Between V2 and V3” on page 28.
Standalone
Media Converter
in ML Mode
Following are example scenarios for the media converter in the ML mode,
connected standalone between two end nodes.
Note
This section applies only to the MMC2000/200 V3 media converter.
The MMC2000/200 V2 media converter does not have the ML
mode.
Figure 23 shows media converter and its LINK/ACT LED behavior in the
ML mode under normal conditions.
Figure 23. ML in Normal Condition
Figure 24 shows media converter and its LINK/ACT LED behavior in the
ML mode when a fiber connection is down.
When a fiber connection to the media converter fails, the fiber LINK/ACT
LED is turned off. The copper port LINK/ACT LED blinks slowly and the
copper link goes down.
Figure 24. ML with Fiber Connection Down
AT-MMC2000 V3
End Node Copper Cable
Fiber Cable
Link LED On
End Node
Link LED On
Copper
LINK/ACT
LED On
Fiber
LINK/ACT
LED On
Link Up Link Up
AT-MMC2000 V3
End Node Copper Cable
Fiber Cable
Link LED Off
End Node
Link LED Off
Copper
LINK/ACT
LED
Blinking
Fiber
LINK/ACT
LED
Off
Link Down Link Down