C H A P T E R 6 Configuring Basic Broadband Internet Access; Recommended Basic Configuration For High-Speed Internet Access - Cisco 7246VXR - uBR Router Software Configuration Manual

Recommended Basic Configuration for High-Speed Internet Access

Figure 6-1
Off-air
channels
Satellite
channels
Internet
The external upconverter shown in
Note
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.
Connect one upstream port and the downstream port to a duplex filter.
Step 1
Note Do not combine multiple ports, because they are all set on the same frequency.
Use at least 40 dB attenuation before the first modem, and modems will connect in under 5 minutes.
Step 2
Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide
6-2
Two-Way Internet Access Network Example
Headend / Hub
AM & digital
modulators
Receivers
Descramblers
Scramblers
RF
Upconverter
Downstream
IF
Cisco uBR10000
series
Upstream
Figure 6-1
Chapter 6 Configuring Basic Broadband Internet Access
Optical transmitter
Optical transmitter
Optical transmitter
RF combiner
Optical receiver
is needed only if you are not using the router's integrated
Subscriber
cable modem
10BaseT
RF
Optical node
RF amplifiers
Optical node
RF RF
RF
Optical node
RF
OL-2239-03
Tap
RF