Omnitron Systems Technology FlexSwitch 6530 FK - Manual (Page 9)

6.0 LINK MODES
In order to accommodate different user requirements, the 6530-FK Media
Converter Modules support five different link modes:
Link Segment (LS)
LS mode transmits a link signal independently of any received Link at any
port. Utilizing this configuration, a loss of a receive link signal will only affect
the port detecting the loss of signal. All the other ports will continue to generate
a link signal. A loss of link on the UTP port, only affects the UTP port; the
other ports remain unaffected.
Link Propagate (LP)
LP mode transmits a link signal only when a link signal is detected. Utilizing
this configuration, a loss of a receive link signal will continue to “propagate”
through to the next port in the network. A loss of link on the UTP port will
cause the fault to propagated forward causing the fiber and UTP ports at the
remote end to drop its link. This setting allows the loss of a link to be detected
by SNMP or other managed network devices.
Remote Fault Detect (RFD)
RFD mode transmits a link signal only when a link signal is detected on the
Fiber Port. When a loss of link is detected, the fault is loop back towards the
other media converter causing a loss of link.
Remote Fault Detect + Link Propagate (RFD+LP)
RFD+LP mode transmits a link signal only when a link signal is detected.
When a loss of link is detected, this mode will perform both a loop back and
propagate forward. A loss of RX fiber causes the fault to loop back causing
the port on the other media converter to lose link. It also propagates the fault
forward toward the UTP port causing the UTP port to lose link.
Note: Connecting two converters together both set to RFD+LP mode will
cause a lockup condition. This is an illegal setting.
Symmetrical Fault Detection (SFD)
In SFD, Fiber Port 2 transmits a link signal only when a link signal is detected
on Fiber Port 1. Fiber Port 1 transmits a link signal only when receiving a link
at both Fiber Port 1 and Fiber Port 2. A loss of link on Fiber Port 1 causes the
fault to loop back towards the other media converter. The fault is also
propagated to Fiber Port 2 causing a loss of link. The other media converter
receiving the loop back fault, will report the fault by blinking its link activity
LED and turning OFF the Fiber Port 2. The blinking LED will indicate a fault
of the transmit Port 1 or Port 2 cables of the converter whose LED is blinking.
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