Planet GTP-805A, Руководство пользователя

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If the connection breaks, the GTP-805A that loses the link
will forward to the Switch/Hub that generates a trap to the
management station. The administrator can then determine the
source of the problem.
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 being disabled (OFF).
Link Loss Return (LLR)
The fiber ports of the GTP-805A have been designed with an
LLR function for troubleshooting a remote connection. LLR works
in conjunction with LLCF.
When LFP function is enabled, the port’s transmitter is shut
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 GTP-805A for remote connectivity.
Note that LLR and LLCF are enabled as indicated in the diagram.
Media
Converter
Management
Station
Switch/Hub
w/SNMP
Station
Media
Converter
Switch/Hub
Fiber
Cable
LFP OFF LFP ON
l LED lit = established link ° LED unlit = no link