ANTAIRA FCU-280 Series, Руководство пользователя

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If the connection breaks, the FCU-280x link loss forwards to the
switch/hub that generates a trap to the management station.
The administrator can then determine the source of the issue.
Media
Converter
Management
Station
Switch/Hub
w/SNMP
Management
Station
Media
Converter
Switch/Hub
w/SNMP
TP TP
Fiber
Cable
LFP ON LFP ON
l LED lit = established link ° LED unlit = no link
Media
Converter
Management
Station
Switch/Hub
w/SNMP
Management
Station
Media
Converter
Switch/Hub
w/SNMP
TP TP
Broken
Fiber
Cable
LFP ON LFP ON
l LED lit = established link ° LED unlit = no link
*Units are shipped with the LFP function enabled (ON).
Link Loss Return (LLR)
The fiber ports of the FCU-280x have been designed with an
LLR function for troubleshooting a remote connection. LLR works
in conjunction with LLCF.
When LFP function is enabled *(by default), the port’s
transmitter shuts down when its receiver fails to detect a valid
receive link. LLR should only be enabled on one end of the link
and is typically enabled on either the unmanaged or remote
device.
The diagram below shows a typical network configuration with
a good link status using the FCU-280x for remote connectivity.
Note that LLR and LLCF are enabled as indicated in the diagram.