2-5
Cisco uBR924 Router Hardware Installation Guide
OL-0338-01 (3/2000)
Chapter 2
Preparing for Installation
Site Requirements
Caution
For proper airflow, keep the back, sides, and bottom of the cable access router clear of
obstructions and away from the exhaust of other equipment. To prevent unit overheating,
never install the Cisco uBR924 router in an enclosed rack or room that is not properly
ventilated or air conditioned.
Power
The Cisco uBR924 router does not contain a power switch. After the cable system technician installs,
connects, powers on, and initializes the unit, it is intended to remain connected to the broadband
network when operating normally. Before plugging the unit in, verify that the power source is within
the values given in Table 2-2.
Note
The same power supply supports both domestic (U.S.) and international operation.
Different power cords are required, however, depending on the country of operation.
Table 2-1
Specifications for Operating and Nonoperating Environment
Specification
Minimum
Maximum
Temperature, ambient operating
32°F (0°C)
104°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.)
N/A
Vibration, nonoperating
10 to 100 Hz, 0.0065 g (1 oct./min.)
N/A
Table 2-2
Cisco uBR924 Cable Access Router Power Specifications
Description
Specification
AC-input voltage
120 to 240 VAC
1
wide input with power factor correction
1.
VAC = volts alternating current.
AC-input current
rating
1.2A
2
maximum at 120 VAC and 0.6A maximum at 240 VAC
2.
A = ampere.
AC-input cable
18 AWG
3
three-wire cable, with a three-lead receptacle on the power supply end, and a North
American (NEMA 5-15P) plug on the power source end; other country-specific cords are available
and supplied as ordered.
3.
AWG = American Wire Gauge.
Power dissipation
12 to 15W
Frequency
50/60 Hz
4
4.
Hz = hertz.
