Specifications

3 Site 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

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

Specification Minimum Maximum

Temperature, ambient operating

Temperature, ambient nonoperating and storage

32˚ F (0˚ C)

-4˚ F (-20˚ C)

104˚ F (40˚ 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.)