6-2
Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide
OL-2239-03
Chapter 6 Configuring Basic Broadband Internet Access
Recommended Basic Configuration for High-Speed Internet Access
Figure 6-1 Two-Way Internet Access Network Example
Note The external upconverter shown in Figure 6-1 is needed only if you are not using the router’s integrated
upconverter.
Recommended Basic Configuration for High-Speed Internet
Access
The Cisco uBR7200 series router is fully capable of self-provisioning all CMs and hosts to which it is
attached. The router supports multiple IP subnets, including different subnets for hosts and CMs.
Configuration options are limited only by available configuration file length.
The Cisco uBR7200 series CMTS automatically connects DOCSIS-compliant CMs and hosts right out
of the box. Therefore, the factory-supplied configuration activates the downstream RF to 851
MHz
center frequency, and the upstream to 37
MHz.
Step 1 Connect one upstream port and the downstream port to a duplex filter.
Note Do not combine multiple ports, because they are all set on the same frequency.
Step 2 Use at least 40 dB attenuation before the first modem, and modems will connect in under 5 minutes.
Off-air
channels
Satellite
channels
Internet
Headend / Hub
Receivers
Descramblers
Scramblers
RF combiner
Subscriber
cable modem
Optical node
Optical node
Optical node
AM & digital
modulators
Optical transmitter
Optical transmitter
Optical transmitter
Optical receiver
RF amplifiers
56453
Cisco uBR10000
series
RF
RF RF
RF
RF
RF
Ta p
Upstream
Upconverter
IF
Downstream
RF
10BaseT
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