Cisco Systems XR 12410 manual Site Wiring Guidelines

Chapter 2 Preparing for Installation

Site Requirement Guidelines

To ensure a satisfactory supplemental ground connection to the router, use the following parts:

Note 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 Figure 2-8).

•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.

Site Wiring Guidelines

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.

Note To predict and remedy strong EMI, you may need to consult with experts in radio frequency interference (RFI).

Site wiring is unlikely to emit radio interference if you use twisted-pair cable with

agood distribution of grounding conductors. Use a high-quality twisted-pair cable with one ground conductor for each data signal, when applicable.

	Cisco XR 12410 Router Installation Guide
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