3-3
Cisco uBR905 Router Hardware Installation Guide
OL-0598-01 (9/2000)
Chapter 3
Installing the Cisco uBR905 Router
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.
Caution
Do not place the router on an uneven or soft surface.
Install the router in compliance with all national and local electrical codes such as:
•
US NFPA 70
•
Canadian Electrical Code, part I, CC22.1
•
IEC 364, part 1 through part 7
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 uBR905 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:
•
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.
Ensure that the data channel frequency has a sufficient RF signal level to meet your
cable plant specifications and verify that the RF input levels relative to a nearby
analog video level:
•
Check the RF signal with an RF power meter at the Type F coax connector to
verify the DOCSIS system signal.
•
Verify that the nearby analog video signal is within the correct range—0 to +15
dBmV for most coaxial cable CATV systems.
Test the installation by establishing an Internet connection, and request data from
a PC connected to the router.
“Verifying Installation”
section on page 3-9
Table 3-1
Installation Checklist (continued)
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