Installation guide

AT-MC1x Series Installation Guide

MissingLink

The MissingLink feature enables the ports on the media converter to pass the

“Link” status of their connections to each other. When the media converter

detects a problem with one of the ports, such as the loss of connection to a end-

node, the media converter shuts down the connection to the other port, thus

notifying the end-node that the connection has been lost.

For example, if the network twisted pair cable on an AT-MC14 were to fail, the

module would respond by dropping the link on the fiber optic port. In this way,

the AT-MC14 notifies the end-node connected to the fiber optic port that the

connection on the twisted pair port has been lost. If the failure had started with

the 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

hubs and switches can be configured to take a specific action in the event of the

loss of connection on a port. In some cases, the unit can be configured to seek a

redundant path to a disconnected end-node or send out a trap to a network

management station, alerting the network administrator of the problem.

Note

MissingLink is disabled when you perform a link test with the Fiber

Link Test switch. Consequently, to ensure that MissingLink is enabled

on the media converter, always set the Fiber Link Test switch to the

DOWN position during normal network operations.