Allied Telesis AT-MC1008/SP - Manual (Page 22)

Chapter 1: Overview
22
fiber optic cabling, the unit would drop the link to the twisted pair port.
The value to this type of network monitoring and fault notification is that
some network devices connected directly to the AT-MC1008 media
converter can be configured to take a specific action in the event of the
loss of connection on a port. In some cases, a network device may be
capable of being configured to seek a redundant path to a disconnected
end-node or send out a trap to a network management station, and so
alert the network administrator of the problem.
Note
MissingLink and Smart MissingLink are disabled when you perform
a link test. Consequently, to ensure that MissingLink or Smart
MissingLink is enabled on the media converter during normal
network operations, always set the MODE push button so that the
ML or SML LED is green.
Smart MissingLink
The Smart MissingLink feature performs exactly the same function as
MissingLink with one additional feature. When a link is lost on a port, the
LINK LED of the port which still has a valid connection to its end-node
starts to blink. This allows you to quickly determine which port still has a
valid connection (LINK LED blinking) and which port has lost its
connection (LINK LED off).
For example, if the network twisted pair cable to the 1000Base-TX port on
the converter were to fail, the LINK LED on the 1000Base fiber optic port
will blink, indicating a failed connection on the twisted pair port. If the
failure had started with the fiber optic cabling, the LINK LED on the
twisted pair port would blink.
The value to this type of network monitoring and fault notification is so
that you can quickly see which port has failed and troubleshoot your
network accordingly.