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Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide
OL-2239-03
Chapter6 Configuring Basic Broadband Internet Access
Basic Internet Access Sample Configuration File
The command lines in the sample configuration file beginning with the cablemodulation-profile
command contain the critical elements necessary to set up a modulation profile in your overall
configuration:
cable modulation-profile 3 request 0 16 1 8 16qam scrambler 152 no-diff 128 fixed uw16
cable modulation-profile 3 initial 5 34 0 48 16qam scrambler 152 no-diff 256 fixed uw16
cable modulation-profile 3 station 5 34 0 48 16qam scrambler 152 no-diff 256 fixed uw16
cable modulation-profile 3 short 5 75 6 8 16qam scrambler 152 no-diff 144 fixed uw8
cable modulation-profile 3 long 8 220 0 8 16qam scrambler 152 no-diff 160 fixed uw8
In this case, the user has configured modulation profile number “3” to be available to upstream channels
wherever they are configured to apply it. Note that this modulation profile has been configured to operate
with a QAM-16 modulation scheme. The default modulation scheme for any upstream profile (if it is not
set to QAM-16) is QPSK.
Later in the configuration file example, upstream port 0 on the cableinterface card installed in slot 5 uses
both the spectrum management and the modulation profile configured in the sample:
cable upstream 0 spectrum-group 1
cable upstream 0 modulation-profile 3