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Site Requirement Guidelines
Note
Site Wiring Guidelines
Cisco XR 12410 Router Installation Guide
2-20
To ensure a satisfactory supplemental ground connection to the router, use the
following parts:
These parts are not available from Cisco, but are available from commercial
vendors.
One grounding lug, which have two M6 bolt holes with 0.625 to 0.75-inch
•
(15.86 to 19.05-mm) spacing between them, and a wire receptacle large
enough to accept a 6-AWG or larger, multistrand copper wire. This lug is
similar to those used for the DC-input power supply leads (see
Two M6 hex-head nuts and locking washers (nickel-plated brass is ideal).
•
One grounding wires. Although we recommends at least 6-AWG multistrand
•
copper wire, the wire diameter and length depend on your router location and
site environment.
When planning the location of the router, consider distance limitations for
signaling, electromagnetic interference (EMI), and connector compatibility. If the
wiring is run for any significant distance in an electromagnetic field, interference
can occur between the field and the signals on the wires. Poor wiring can cause:
Radio interference emanating from the wires.
•
Strong EMI, especially when caused by lightning or radio transmitters. EMI
•
can destroy the signal drivers and receivers in the router, and can even create
an electrical hazard by conducting power surges through lines and into
equipment.
To predict and remedy strong EMI, you may need to consult with experts
Note
in radio frequency interference (RFI).
Site wiring is unlikely to emit radio interference if you use twisted-pair cable with
a good distribution of grounding conductors. Use a high-quality twisted-pair cable
with one ground conductor for each data signal, when applicable.
Chapter 2
Preparing for Installation
Figure
OL-13832-01
2-8).
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