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Cisco uBR905 Router Hardware Installation Guide
OL-0598-01 (9/2000)
Chapter 3
Installing the Cisco uBR905 Router
Connecting to the Cable System
•
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.
Warning
Never defeat the ground conductor or operate the equipment in the absence of a suitably
installed ground conductor. Contact the appropriate electrical inspection authority or
an electrician if you are uncertain that suitable grounding is available.
•
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).
•
Do not work on the system or connect or disconnect any cables (Ethernet, cable, or power) during
periods of lightning activity—the possibility of serious physical injury exists if lightning should
strike and travel through those cables. In addition, the equipment could be damaged by the higher
levels of static electricity present in the atmosphere.
Note
Adhere to the safety guidelines presented in the “Safety” section on page 2-1 before
following procedures in the remainder of this chapter. Be sure that all equipment to be
connected to the cable access router is powered off.
Caution
Do not connect the router to power at this point, because the router will begin its initial
power on sequence and attempt to connect to the network. The unit should be powered on
only after all other connections have been made, as described later in this chapter.
Connecting to the Cable System
To connect the Cisco uBR905 cable access router to the cable system:
Step 1
Verify that the router is not connected to power.
Step 2
Locate the RF coaxial cable coming from the coaxial cable CATV wall outlet.
Step 3
Install a cable splitter/directional coupler, if needed, to separate signals for TV and computer usage. If
necessary, also install a high-pass filter to prevent interference between the TV and computer signals.
Step 4
Connect the RF coaxial cable to the router’s F-connector. Hand-tighten the connector, making sure that
it is finger tight; then give it a 1/6 turn with a wrench. (See Figure 3-1.)
