IMC Networks McBasic TX/FX Operation Manual page 7

TX LinkLoss
TX LinkLoss is another troubleshooting feature. When a fault occurs on the twisted
pair segment of a conversion, TX LinkLoss detects the fault and passes this
information to the fiber segment. If a media converter is not receiving a twisted pair
link, TX LinkLoss disables the transmitter on the media converter's fiber port. This
results in a loss of link on the device connected to the fiber port.
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.
FiberAlert and LinkLoss
The following table provides an overview of the troubleshooting features, their
functionality and the recommended settings for a pair of media converters in a typical
central/main site to remote site application:
LINKLOSS/FIBERALERT COMPARISON TABLE
Feature
FX LinkLoss
TX LinkLoss
FiberAlert
Enable FiberAlert on only ONE side of a media conversion; enabling it on both sides will
keep both transmitters off indefinitely. If you want to enable FiberAlert on BOTH sides of
the conversion, you MUST also enable Pulsing FiberAlert on one unit. IMC Networks
recommends enabling Pulsing FiberAlert on ONE side (see page 5).
FiberAlert is not available/applicable on single-strand fiber versions of McBasic
Fault Location Disabled LEDs
Fiber Twisted Pair
Twisted Pair Fiber
Fiber Fiber
INSTALLATION TIP
NOTE
4
Enable At:
Main Site Only
Remote Site Only
Remote Site Only
.