Instruction manual

8
Link Fault Pass Through
Link Fault Pass Through (LFPT) is a troubleshooting feature that combines TX and FX
LinkLoss from both the local and remote media converter modules (only available on
the McLIM the 100 Mbps TX/FX -00, -10, -20, -30). LFPT is enabled by turning on
both FX and TX LinkLoss on both modules. This feature allows both end segments of
the conversion to detect link faults occurring in the media conversion chain.
FiberAlert can also be added to the remote side of the pair to further assist in locating
a fault.
FiberAlert
FiberAlert minimizes the problems associated with the loss of one strand of fiber. If a
strand is unavailable, the IMC Networks device at the receiver end notes the loss of
link. The device will then stop transmitting data and the link signal until a signal or
link pulse is received. The result is that the link LED on BOTH sides of the fiber
connection will go out indicating a fault somewhere in the fiber loop. Using
FiberAlert, a local site administrator is notified of a fault and can quickly determine
where a cable fault is located.
WARNING
Enable FiberAlert on ONE side of a media conversion only;
enabling it on both sides will keep both transmitters off indefinitely!
Product with enabled —Remote Site stops transmitting
Local Link LED is OFF indicating a break in the fiber loop
FiberAlert
XMT
RCV
LED
Remote Site
Local Site
LED OFF = Broken Link
LED
XMT
RCV
Cable Break