Planet FTP-802 [11/22] Link fault pass through lfp

Planet FTP-802 [11/22] Link fault pass through lfp
10
5. Link Fault Pass through (LFP)
The LFP function includes the Link Fault Pass Through
function (LLCF/LLR) and the DIP Switch design. LLCF/LLR can
immediately alarm administrators the problem of the link media
and provide efcient solution to monitor the net. The DIP Switch
provides disable or enable the LFP function.
LLCF (Link Loss Carry Forward) means when a device connected
to the converter and the TP line loss the link, the converter’s
ber will disconnect the link of transmit. LLR (Link Loss Return)
means when a device connected to the converter and the ber
line loss the link, the converter’s ber will disconnect the link
of transmit. Both can immediately alarm administrators the
problem of the link media and provide efcient solution to
monitor the net.
Link Loss Carry Forward (LLCF)
FTP-80X incorporates an LLCF function for troubleshooting a
remote connection. When LFP function is enabled, the FL / TP
ports do not transmit a link signal until they receive a link signal
from the opposite port.
The diagram below shows a typical network conguration with a
good link status using FTP-80X for remote connectivity.
Media
Converter
Management
Station
Switch/Hub
w/SNMP
Management
Station
Media
Converter
Switch/Hub
w/SNMP
TP TP
Fiber
Cable
LFP ONLFP 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 ONLFP ON
l LED lit = established link ° LED unlit = no link
If the connection breaks, FTP-80X that link loss forward to the
switch/hub that generates a trap to the management station.

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