Cisco Systems uBR7246VXR quick start Site Preparation, Site Environment, Power Guidelines

3Site Preparation

Check the following:

•Site is capable of maintaining an ambient temperature of 32 to 104 degrees Fahrenheit

•Site power is available and adequate

•Cabling requirements (type, distance)

•Rack-mounting requirements (working space, proper airflow)

Site Environment

Warning	This unit is intended for installation in restricted access areas. A restricted access area can be accessed only
	through the use of a special tool, lock and key, or other means of security. Statement 1017
Warning	This product requires short-circuit (overcurrent) protection, to be provided as part of the building installation.
	Install only in accordance with national and local wiring regulations. Statement 1045

Temperature and Humidity Requirements

Table 1 lists the nominal operating and nonoperating environment requirements. Any measurements that approach the minimum or maximum of a range indicate a potential problem.

Table 1	Operating and Nonoperating Environments
Specification		Minimum	Maximum
Temperature, ambient operating		32° F (0° C)	104° F (40° C)
Temperature, ambient nonoperating and storage		-4° F (-20° C)	149° F (65° C)
Humidity, ambient (nonconducting) operating		10%	90%
Humidity, ambient (noncondensing) nonoperating and storage		5%	95%
Altitude, operating and nonoperating		–197 ft (–60 m)	13,123 ft (4000 m)
Vibration, operating		—	5 to 200 Hz, 0.5 g (1 octet/min.)
Vibration, nonoperating		—	5 to 200 Hz, 1 g (1 octet/min.)
			200 to 500 Hz, 2 g (1 octet/min.)

Power Guidelines

Follow these precautions and recommendations when planning power connections to the Cisco uBR7246VXR router:

•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.

•Provide proper grounding.

•Make sure that the frame ground is tied to a single building ground.

•Use a 6-AWG, copper ground conductor (minimum requirement) when attaching the chassis ground to a headend or other interior ground system.

Warning A readily accessible two-poled disconnect device must be incorporated in the fixed wiring. Statement 1022

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