Bnc Port Termination - IMC Networks McPC Install Manual

After installation, you can configure McPCs for the following features,
depending on the requirements of your installation:
Crossover/pass-through connection on the twisted pair port
BNC Port Termination (McPC TP/BNC only)
FiberAlert (McPC TP/FO only)
LinkLoss (McPC TP/FO only)
Twisted Pair Crossover/Pass-Through Switch
The twisted pair port features a push-button switch, located next to the
RJ-45 connector, for selecting a crossover workstation connection or pass-
through repeater/hub connection for this port.
To select a pass-through connection, simply press the push-button IN. A
crossover connection is selected when the push-button is OUT.
If uncertain whether a crossover or pass-through connection is needed, set
the push-button to the position that makes the LNK (link) LED glow.

BNC Port Termination

McPC TP/BNC features a 2-position switch next to the BNC connector
that allows a thin coaxial segment to be terminated at the port without an
additional 'T' connector and terminator.
If McPC TP/BNC is attached to a mid-point of a
thin Ethernet segment, attach a 'T' connector
to the BNC port. Termination must be OFF
(disabled). Termination is disabled when the switch
is in the left position.
If a thin Ethernet segment is to be terminated at
McPC TP/BNC, attach the cable directly to the BNC
connector and set the termination switch to ON (enabled – factory default) by
moving the switch to the right position.
Troubleshooting with LinkLoss and FiberAlert
LinkLoss and FiberAlert are advanced troubleshooting features from IMC
Networks that can help you use your McPC TP/FO to locate "silent failures"
on your network.
It is vital that you understand exactly how FiberAlert and LinkLoss work and
how they will react in your network configuration before attempting to install
the enclosed module/unit.
Installing modules without understanding the effects of Linkloss and
FiberAlert can cause perfectly functioning units to appear flawed or
even dead!
If you are unfamiliar with FiberAlert and LinkLoss, IMC Networks strongly
encourages you to read the following information.
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Contact IMC Networks technical support at (800) 624-1070 (U.S. and
Canada), +32-16-550880 (Europe) or t t e e c c h h s s u u p p p p o o r r t t @ @ i i m m c c n n e e t t w w o o r r k k s s . . c c o o m m for
more information and assistance.
A L I
B O U T I N K N T E G R I T Y
During normal operation, link integrity pulses are transmitted by all point-
to-point Ethernet devices. When an IMC Networks media converter receives
valid link pulses, it knows that the device to which it is connected is up
and sending pulses, and that the copper or fiber cable coming from that
device is intact. The appropriate LNK ("link") LED is lit to indicate this. The
IMC Networks media converter also sends out link pulses from its copper and
fiber transmitters but normally has no way of knowing whether the cable to
the other device is intact and the link pulses are reaching the other end. The
combination of FiberAlert and LinkLoss allows this information to be obtained,
even when physical access to a remote device (and its link integrity LED) is
not available.
W I F A ?
H A T S I B E R L E R T
FiberAlert lets you know when a fault occurs on your fiber loop by stopping
data transmissions and affecting
fiber LEDs on both sides of your
network. If a media converter is
not receiving a fiber link,
FiberAlert disables the media
converter's fiber fiber transmitter,
thus mirroring the link status of
the opposite end of the fiber.
Both fiber link LEDs on either
end of the link should extinguish, alerting you to the fault.
Using FiberAlert, a local site administrator is notified of a fault and can
quickly determine where a cable fault is located without having to go to the
remote site.
N O T E
FiberAlert should only be enabled on one side of a media conversion.
Enabling it on both sides would keep both transmitters off indefinitely.
W I L L ?
H A T S I N K O S S
LinkLoss functions much like FiberAlert in that faults on one port are mir-
rored on the other. In
F
I B E R A L E R T
the case of LinkLoss,
Feature
however, a fault on the
FiberAlert
fiber port is passed to
LinkLoss
the Ethernet twisted pair
port.
/ L L C
I N K O S S O M P A R E D
Fault Location
Disabled LEDs
Fiber
Fiber
Fiber
Twisted Pair
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