Cisco Systems UBR-3X10 manual Site Environment, Site Configuration Maintaining Normal Operation

Chapter 2 Preparing for Installation

Site Requirements

Site Environment

Table 2-1lists the operating and nonoperating site temperature requirements. The following ranges are those within which the Cisco uBR 3x10 RF Switch continues to operate; however, a measurement that is approaching the minimum or maximum of a range indicates a potential problem. You can maintain normal operation by anticipating and correcting environmental anomalies before they approach a maximum operating range.

Table 2-1	Specifications for 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)

Site Configuration: Maintaining Normal Operation

Planning a proper location for the Cisco uBR 3x10 RF Switch and the layout of your equipment rack or wiring closet is essential for successful system operation. Equipment placed too close together or inadequately ventilated can cause system overtemperature conditions. In addition, chassis panels made inaccessible by poor equipment placement can make system maintenance difficult. Following are precautions that can help avoid problems during installation and ongoing operation.

General Precautions

Follow these general precautions when planning your equipment locations and connections:

•Use the show environment command regularly to check the internal system status. The environmental monitor continually checks the interior chassis environment; it provides warnings for high temperature and maximum and minimum voltages and creates reports on any occurrences. If warning messages are displayed, take immediate action to identify the cause and correct the problem.

•We recommend keeping the Cisco uBR 3x10 RF Switch off the floor and out of any area that tends to collect dust, excessive condensation, or water.

•Follow the ESD prevention procedures in the “Preventing Electrostatic Discharge Damage” section on page 2-4 to avoid damage to equipment. Damage from static discharge can cause immediate or intermittent equipment failure.

Power Considerations

Follow these precautions and recommendations when planning power connections to a Cisco uBR 3x10 RF Switch:

•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.

Cisco uBR-3x10 RF Switch Hardware Installation and Cabling Guide

2-6 OL-1984-06