Site Environment - Cisco 7000 Series Hardware Installation And Maintenance Manual

Figure 2-1
Caution
air-conditioned.

Site Environment

The router can operate as a standalone system placed on a table or as a rack-mounted system in a
data processing or lab environment. The fans operate at 55 percent of capacity when it is possible to
do so and maintain an acceptable operating temperature inside the chassis. If the temperature
exceeds 23°C, the fan speed increases linearly until it reaches 100 percent. Although the fans support
quieter operation under normal conditions (approximately 46 dBa), the noise level when the fans are
operating at 100-percent capacity is approximately 58 dBa. Therefore, the router is best suited for
unattended or computer room use.
The router requires a dry, clean, well-ventilated, and air-conditioned environment. The internal fan
array pulls ambient air through the chassis to cool the internal components. To allow sufficient
airflow, maintain a minimum of two inches of clearance on both the inlet and exhaust sides of the
chassis. If the airflow is blocked or restricted, or if the inlet air is too warm, an overtemperature
condition can occur. Under extreme conditions, the environmental monitor will shut down the power
to protect the system components. To help maintain normal operation and avoid unnecessary
maintenance, plan your site configuration and prepare your site before installation.
After installation, make sure that the site maintains an ambient temperature of 32 through 104°F
(0 through 40°C), and keep the area around the chassis as free from dust as is practical. For a
description of the environmental monitor and status levels, refer to the section "Environmental
Monitoring and Reporting Functions" in the chapter "Product Overview."
Chassis Footprint and Outer Dimensions
14.25 in. (36.20 cm)
2 in.
Power supply width
(5.08 cm)
14.60 in. to ears (37.08 cm)
Noninterface processor end
Interface processor end
Interface processor width
14.55 in. (36.96 cm)
17.50 in. (44.45 cm)
Never install the router in an enclosed rack that is not properly ventilated or
Chassis foot C
Chassis width
Site Requirements
1.25 in. (3.18 cm)
Preparing for Installation 2-15