Cisco XR 12404 - Manual (Page 62)

Chapter 2 Preparing for Installation
Unpacking and Repacking the Cisco XR 12404 Router
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Cisco XR 12404 Router Installation Guide
OL-13830-02
Note 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.
Distance Limitations
If wires exceed recommended distances, or if wires pass between buildings, give
special consideration to the effect of a lightning strike in your vicinity. The
electromagnetic pulse (EMP) caused by lightning or other high-energy
phenomena can easily couple enough energy into unshielded conductors to
destroy electronic devices. If you have had problems of this sort 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 just described without pulse meters and other special equipment. These
problems can cost a great deal of time to identify and resolve, so take precautions
by providing a properly grounded and shielded environment, with special
attention to issues of electrical surge suppression.
Unpacking and Repacking the Cisco XR 12404 Router
The shipping package for Cisco XR 12000 Series Routers is engineered to reduce
the potential of product damage associated with routine material handling
experienced during shipment. To minimize potential damage to the product,
transport these products in their Cisco-specified packaging. Failure to do so may
result in damage to the router or degradation of its performance. Also, do not
remove the Internet router from its shipping container until you are ready to install
it. The router should always be transported or stored in an upright position. Keep
the router in the shipping container until you have determined where you will
install it.
todd.book Page 16 Monday, March 16, 2009 2:47 PM