Equipment-Rack Ventilation; Power; Preparing Network Connections; Additional And Optional Connection Equipment - Cisco 7000 Hardware Installation And Maintenance

Preparing Network Connections

Equipment-Rack Ventilation

If you plan to install the router in an equipment rack, follow these precautions for avoiding
overtemperature conditions in addition to the guidelines that are provided in the section "Equipment
Racks" in this chapter:
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For a functional description of the environmental monitor and the status levels, refer to the section
"Environmental Monitoring and Reporting Functions" in the chapter "Product Overview."

Power

Follow these precautions when planning power connections to the router.
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Preparing Network Connections
When preparing your site for network connections to the router, you must consider a number of
factors related to each type of interface, such as the type of cabling required for each type (fiber, thick
or thin coaxial, or twisted-pair cabling), distance limitations for each signal type, the specific cables
you need to connect each interface, and any additional interface equipment you need, such as
transceivers, modems, channel service units (CSUs), or data service units (DSUs). Before installing
the router, have all additional external equipment and cables on hand. If you intend to build your own
cables, refer to the cable pinouts in the appendix "Cabling Specifications." For ordering information,
contact a customer service representative.

Additional and Optional Connection Equipment

You may need some of the following data communications equipment to complete your installation.
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synchronous. When connecting serial devices such as modems or DSUs, connect only asynchronous
devices to the console and auxiliary ports, and synchronous devices to the FSIP serial ports.
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Install the chassis only in an enclosed rack that has adequate ventilation or an exhaust fan; use an
open rack whenever possible.
A ventilation system that is too powerful in a closed rack may also prevent cooling by creating
negative pressure around the chassis and redirecting the air away from the chassis intake vent. If
necessary, operate the chassis with the rack open.
The correct use of baffles inside the enclosed rack can assist in cooling the chassis.
Equipment near the bottom of a rack may generate excessive heat that is drawn upward and into
the intake ports of equipment above, leading to overtemperature conditions in the chassis at or
near the top of the rack.
Check the power at your site before installation and periodically after installation to ensure that
you are receiving clean power. Install a power conditioner if necessary.
Install proper grounding to avoid damage from lightning and power surges.
Connect redundant power supplies to separate input power lines whenever possible. Install a
second source for redundant power if a separate line is not already in place.
To install and configure the router, you need a terminal with an EIA/TIA-232 DTE port and an
EIA/TIA-232 DCE console cable with DB-25 plugs at both ends. You can detach the terminal
(and cable) after the installation and configuration procedures are complete.
The console and auxiliary serial ports are asynchronous, and the FSIP serial ports are