5
FiberAlert (FA)
FiberAlert minimizes the
problems associated with the
loss of one strand of fiber. If
a strand is not available, 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 would keep both transmitters off indefinitely.
Modules ship from the factory with troubleshooting features disabled.
FX Auto Negotiation on IE-iMcV-Gigabit TX/SFP
The IE-iMcV-Gigabit TX/SFP Module includes a FX Auto Negotiation feature which
negotiates duplex mode. This feature must be enabled or disabled on both ends of
the connection or there may be difficulty establishing a link. If the device being
connected to the IE-iMcV-Gigabit TX/SFP Module does not support Auto Negotiation,
disabling the feature on the IE-iMcV-Gigabit TX/SFP Module forces the link up.
DIP Switch settings for FX AN:
DIP Switch
Default Setting
S1-5
FX AN = ON
FX LinkLoss (FXLL)
FX LinkLoss is a troubleshooting feature. When a fault occurs on the fiber segment of
a conversation, FX LinkLoss detects the fault and passes this information to the
twisted pair segment. If a media converter is not receiving a fiber link, FX LinkLoss
disables the transmitter on the media converter’s twisted pair port. This results in a
loss of link on the device connected to the twisted pair port, and the FXLL LED will
blink.
