Cisco Systems XR 12406 manual Site Wiring, Electromagnetic Interference

Chapter 2 Preparing for Installation

Installation Site Requirements

Site Wiring

This section presents site wiring guidelines for setting up the plant wiring and cabling at your site. When planning the location of the new system, consider the following:

•Electromagnetic interference (EMI)

•Distance limitations for signaling and unshielded conductors

Electromagnetic Interference

EMI can occur between the signals on the wires and external or ambient EMI fields when the wires are run for any significant distance. Bad wiring practice can result in radio interference emanating from the plant wiring.

Warning Strong EMI, especially when it is caused by lightning or radio transmitters, can destroy the signal drivers and receivers in the Cisco XR 12406 Router, can create an electrical hazard by conducting power surges through lines, and can damage the equipment.

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

If you use twisted-pair cable in your plant wiring with a good distribution of grounding conductors, the plant wiring is unlikely to emit radio interference. If you exceed the recommended distances, use a high-quality twisted-pair cable with one ground conductor for each data signal when applicable.

	Cisco XR 12406 Router Installation Guide
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