Environmental; Power; Catv Coaxial Cabling - Cisco uBR905 Installation Manual

Chapter 2 Preparing for Installation
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Environmental

Appendix A, "Technical Specifications," lists the operating and nonoperating environmental site
requirements for operation of the Cisco uBR905 router. The ranges indicate the minimum and
maximum values allowed for the router's operation, but if a measurement approaches the minimum or
maximum of a range, it could indicate a potential problem. You can maintain normal operation by
anticipating and correcting environmental anomalies before they approach a maximum operating range.
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 the unit from
overheating, never install the Cisco uBR905 router in an enclosed rack or room that is not
properly ventilated or air conditioned.

Power

The Cisco uBR905 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 in and applying power to the Cisco uBR905 router, verify that the power source is
within the values given in Appendix A, "Technical Specifications."
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.
Use only a power supply and cord that is provided by Cisco and that is applicable to the
Caution
country of operation. Using any other vendor's power supply and cord can cause loss of
data or permanent damage.

CATV Coaxial Cabling

When running the coaxial line from the cable TV trunk connection to the subscriber site, consider the
issues of electromagnetic interference (EMI), coaxial cable quality, and distance limitations for
signaling, as described in the following sections.
OL-0598-01 (9/2000)
Ensure that you bring sufficient cables to connect all devices at all subscriber locations. For
simultaneous TV and computer usage at a subscriber site, obtain cable splitters and directional
couplers as appropriate to install when you install the router.
As applicable for testing or reconfiguration based on your network practices, obtain IP addresses
pertinent to your network from your system administrator if you are statically configuring the
subscriber site. (For most networks, IP addresses are supplied automatically.)
Cisco uBR905 Router Hardware Installation Guide
Site Requirements
2-5