Radio Frequency Interference; Electromagnetic Compatibility - Juniper M7i Hardware Manual

M7i Multiservice Edge Router Hardware Guide

Radio Frequency Interference

Electromagnetic Compatibility

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You can reduce or eliminate the emission of radio frequency interference (RFI) from your
site wiring by using twisted-pair cable with a good distribution of grounding conductors.
If you must exceed the recommended distances, use a high-quality twisted-pair cable
with one ground conductor for each data signal when applicable.
If your site is susceptible to problems with electromagnetic compatibility (EMC),
particularly from lightning or radio transmitters, you might want to seek expert advice.
Strong sources of electromagnetic interference (EMI) can destroy the signal drivers and
receivers in the network device and conduct power surges over the lines into the
equipment, resulting in an electrical hazard. It is particularly important to provide a properly
grounded and shielded environment and to use electrical surge-suppression devices.
CAUTION: To comply with intrabuilding lightning and surge requirements,
intrabuilding wiring must be shielded, and the shield for the wiring must be
grounded at both ends.
WARNING: The intrabuilding ports of the equipment or subassembly are
suitable for connection to intrabuilding or unexposed wiring or cabling only.
The intrabuilding ports of the equipment or subassembly MUST NOT be
metallically connected to interfaces that connect to the Outside Plant (OSP)
or its wiring. These interfaces are designed for use as intrabuilding interfaces
only (Type 2 or Type 4 ports as described in GR-1089-CORE, Issue 4) and
require isolation from the exposed OSP cabling. The addition of primary
protectors is not sufficient protection in order to connect these interfaces
metallically to OSP wiring.
General Electrical Safety Guidelines and Electrical Codes for Juniper Networks Devices
Copyright © 2019, Juniper Networks, Inc.