REQUIREMENTS/SPECIFICATIONS
2-7
Noise can be caused by either crosstalk or externally induced
impulses. If noise induced errors are suspected, it may be necessary
to re-route cabling away from potential noise sources (motors,
switching equipment, fluorescent lighting, high amperage
equipment), or to ensure that the electrical wiring in the area is
properly wired and grounded.
In addition to complying with the preceding cable specifications,
the following recommendations should be followed to minimize
errors and help to obtain optimum performance from your
network:
•
UTP cabling should be free of splices, stubs or bridged taps.
•
No more than two punch-down blocks between TCU ports and
wall outlets.
•
Metal troughs, ducts, etc. carrying token ring signals should be
properly grounded.
•
Route cables away from sources of electrical noise, such as:
-Power lines
-Fluorescent lights
-Electric motors
-Radio interference
-Heavy machinery.
•
Do not use UTP as main trunk cabling.
•
Token ring signals should not be routed through UTP cables
that exit a building or which are adjacent to cables either exiting
a building or exposed to lightning strikes and power surges.
•
UTP cables that contain token ring signals should not be
simultaneously used for applications which may impress high
voltages (greater than 5 volts) with sharp rise or fall times, since
the noise coupling from such signals could directly cause errors
on the token ring network.
