IMC Networks iMcV-FiberLinX, Operation Manual

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The iMcV-FiberLinX ships from the factory with Auto-Negotiation
enabled on the twisted pair ports. In this mode, the ports automatically
negotiate for speed and duplex.
The twisted pair ports on the iMcV-FiberLinX can also be manually set for
10 Mbps or 100 Mbps operation and for Half- or Full-Duplex (i.e. 10 Mbps
Full-Duplex, 10 Mbps Half-Duplex, 100 Mbps Full-Duplex or 100 Mbps
Half-Duplex).
Selective Advertising, when used in combination with Auto-Negotiation,
advertises only the configured speed and duplex mode for the twisted pair
port. If a specific speed and/or duplex mode is desired, Selective
Advertising should be used rather than Force Mode, when connecting to
devices that ONLY auto-negotiate.
Bandwidth Control
The iMcV-FiberLinX includes bi-directional bandwidth control.
Bandwidth can be independently set, in 32 Kbps increments, from the
transmitting Data port to the receiving port and vice versa in single iMcV-
FiberLinX solutions, and from the Host unit to the Remote unit and vice
versa in dual iMcV-FiberLinX applications (i.e. the bandwidth on the DATA
ports on both Host/Remote units is throttled).
FX LinkLoss and FiberAlert
The iMcV-FiberLinX includes the troubleshooting features FX LinkLoss
and FiberAlert. When a fault occurs on the fiber segment, FX LinkLoss
detects the fault and passes this information to the twisted pair segment.
This results in a loss of link on the remote twisted pair device.
FiberAlert minimizes the problems associated with the loss of one strand
of fiber. If a strand is unavailable, the iMcV-FiberLinX notes the lost link and
will 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 con-
nection will go out
indicating a fault some-
where in the fiber
loop. Using FiberAlert,
a local site administra-
tor is notified of a fault
and can quickly deter-
mine the location of a
cable fault.
Figure I: How FiberAlert Works
NOTE
Without understanding FX LinkLoss and FiberAlert, the iMcV-FiberLinX could
appear flawed or even malfunctioning.