Table of Contents
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Preface
Section
Chapter 4
Chapter 5
Electromagnetic Compliance
Electromagnetic compliance information is presented in the following sections:
•
•
Electromagnetic Compatibility Regulatory Statements
For regulatory, compliance and safety information, see the
inforamtion for the Cisco 10720 Internet Router
Site Wiring Distance and Interference Guidelines
This section offers site wiring guidelines for setting up the site plant wiring and cabling. When planning
the location of the new system, consider the following:
•
•
Electromagnetic Interference
Electromagnetic interference can occur between the field and the signals on the wires when the wires are
run for any significant distance. This fact has two implications for the construction of plant wiring:
•
•
Note
A good quality twisted pair cable or shielded twisted pair cable helps limit radiation and noise induced
into the cable minimizing:
•
•
78-13113-06 B0
Title
Creating a Four-Node Ring Using
the Uplink Cards
Troubleshooting the Uplink Cards
Electromagnetic Compatibility Regulatory Statements, page ix
Site Wiring Distance and Interference Guidelines, page ix
Electromagnetic Interference, page ix
Distance Limitations for Signaling and Unshielded Conductors, page x
Poor wiring practice can result in radio interference emanating from the plant wiring.
Strong EMI, especially when it is caused by lightning or radio transmitters, can destroy and/or cause
interference with the signal drivers and receivers in the Cisco 10720 Internet Router, and can create
an electrical hazard by conducting power surges through lines and into equipment.
To predict and remedy strong EMI, consult experts in radio frequency interference (RFI).
Potential for radio interference
Potential for interference with the data transmission.
Description
Provides information for creating a four-node
DPT ring using the DPT uplink card or IEEE
802.17 ring using the RPR/SRP uplink card.
Provides troubleshooting information for
checking the uplink card installation, as well as
alarm message information and solutions to the
problems.
Regulatory Compliance and Safety
document.
Cisco 10720 Internet Router Uplink Cards Installation and Configuration
Electromagnetic Compliance
ix
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Table of Contents
Troubleshooting
