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Preparing for Installation 2-11
Preventive Site Configuration: Maintaining Normal Operation
Table 2-1 Specifications for Operating and Nonoperating Environments
Preventive Site Configuration: Maintaining Normal Operation
Planning a proper location for the Cisco uBR904 cable modem is essential for successful
system operation. Equipment placed too close together or inadequately ventilated can cause
system overtemperature conditions. In addition, 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:
• We recommend keeping the Cisco uBR904 cable modem off the floor and out of any
area that tends to collect dust.
• Follow ESD prevention procedures to avoid damage to equipment. Damage from static
discharge can cause immediate or intermittent equipment failure.
Specification Minimum Maximum
Temperature, ambient operating 32°F (0°C) 114°F (40°C)
Temperature, ambient nonoperating and storage –13°F (–25°C) 95°F (70°C)
Humidity, ambient (noncondensing) operating 5% 95%
Humidity, ambient (noncondensing) nonoperating and
storage
5% 95%
Altitude, operating and nonoperating Sea level 10,000 ft (3,050 m)
Vibration, operating 10 to 200 Hz, 0.0005 g (1 oct./min.) –
Vibration, nonoperating 10 to 100 Hz, 0.0065 g (1 oct./min.) –