Cisco 12016, Руководство по установке и настройке, Страница: 97 / 416

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Cisco 12016, Cisco 12416, and Cisco 12816 Router Installation and Configuration Guide
OL-11495-01
Chapter 2 Preparing for Installation
GRP Port Connection Guidelines
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.
Give special consideration to the effect of a lightning strike in your vicinity,
especially if the wiring exceeds the recommended distances, or if it passes
between buildings. The electromagnetic pulse (EMP) caused by lightning or other
high-energy phenomena can easily induce enough energy into unshielded
conductors to destroy electronic devices. If you have experienced EMP problems
in the past, you may want to consult experts in electrical surge suppression and
shielding.
Most data centers cannot resolve the infrequent but potentially catastrophic
problems without pulse meters and other special equipment. In addition, these
problems can take a great deal of time to identify and resolve. We recommend that
you take the necessary precautions to avoid these problems by providing a
properly grounded and shielded environment, with special attention to issues of
electrical surge suppression.
GRP Port Connection Guidelines
This section contains detailed cabling and signal information for all interface and
port connections to the GRP. It also provides information for Ethernet routing and
equipment.
Caution Ports labeled Ethernet, 10BASE-T, Token Ring, Console, and AUX are safety
extra-low voltage (SELV) circuits. Only connect SELV circuits to other SELV
circuits.
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GRP Auxiliary and Console Port Connections, page 2-26
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GRP Ethernet Port Connections, page 2-29
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PRP Auxiliary and Console Port Connection Guidelines, page 2-36
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PRP Ethernet Connections, page 2-40