Physical Placement; Verifying Power Requirements - Cisco uBR924 Installation Manual
Cable access router
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Physical Placement
Physical Placement
Place the cable access router on a stable, flat surface such as a desktop, close to the cable TV drop
connection and all devices to be connected at the subscriber site. The bottom, sides, and rear of the
router must remain unobstructed to ensure adequate airflow and to prevent the unit from overheating.
The rubber feet on the bottom of the router provide enough clearance when the unit is placed on a flat,
hard surface. Cisco recommends at least 3 inches of clearance at the rear of the router.
Do not place the router on an uneven or soft surface.
Caution
Install the router in compliance with all national and local electrical codes such as:
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Verifying Power Requirements
The cable access router uses one external AC-input power supply. The OK (power) LED on the front of
the unit indicates that the power supply is supplying power to the unit when it is connected and
operational.
The AC-input power supply uses a power factor corrector that allows the Cisco uBR924 cable access
router to operate in any country where the input voltage is between 100 and 240 VAC, and 50 or 60 Hz.
Different power cords are available to suit the country of operation.
Refer to Table A-1 on page A-1 for AC-input power supply specifications, including input voltage and
operating frequency ranges. Cisco recommends that you follow these precautions:
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The plug-socket combination must be accessible at all times because it serves as the
Warning
main disconnecting device.
•
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Never defeat the ground conductor or operate the equipment in the absence of a suitably
Warning
installed ground conductor. Contact the appropriate electrical inspection authority or
an electrician if you are uncertain that suitable grounding is available.
•
Cisco uBR924 Router Hardware Installation Guide
3-4
US NFPA 70
Canadian Electrical Code, part I, CC22.1
IEC 364, part 1 through part 7
Check the power at the subscriber site before and after installation to ensure that you are receiving
clean power. Install a power conditioner if necessary.
If plugging the router into an Uninterruptible Power Supply (UPS), verify that the total power and
current requirements used by all devices plugged into the UPS are within the maximum limits of
the UPS.
Install proper grounding to avoid damage from lightning and power surges. If using a North
American (NEMA 5-15P) plug, you must plug the unit into a three-lead receptacle to ensure proper
grounding.
Ensure that a fuse or circuit breaker no larger than 120 VAC, 15A U.S. (240 VAC, 10A
International) is used on the phase conductors (all current-carrying conductors providing power to
the device).
Chapter 3
Installing the Cisco uBR924 Router
OL-0338-01 (3/2000)
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Troubleshooting
