Cirkuit Planet FTP-802 사용자 설명서
11
The administrator can then determine the source of the
problem.
problem.
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 disable (OFF).
Link Loss Return (LLR)
The fiber ports of FTP-80X have been designed with an LLR
function for troubleshooting a remote connection. LLR works in
conjunction with LLCF.
function for troubleshooting a remote connection. LLR works in
conjunction with LLCF.
When LFP function is enabled, 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.
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 FTP-80X for remote connectivity. Note
that LLR and LLCF are enabled as indicated in the diagram.
a good link status using FTP-80X 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
Media
Converter
Management
Station
Switch/Hub
w/SNMP
Station
Media
Converter
Management
Switch/Hub
TP
TP
Broken
Fiber
LFP ON
LFP ON
l
LED lit = established link ° LED unlit = no link
Port 2
Port 1
Link Loss Carried Forward
Link Loss Returned
Link Loss Carried Forward