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Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide
OL-2239-05
Chapter1 Overview of Cisco uBR7200 Series Software
CiscouBR7200Series Router Configuration Overview
Tip The digital carrier frequency is not the same as the video carrier frequency. For EIA channel95, the
video carrier frequency is 91.250 MHz which is 1.75 MHz below the center frequency.
• Activating the downstream port on the cable interface line card for data transmission over the HFC
network, using the following command:
Router (config-int)# no shutdown
The particular downstream port LED should light.
• Setting the upstream frequency of your RF output to comply with the expected input frequency of
your Cisco cable interface line card.
Tip The valid range for a fixed upstream frequency is 5,000,000 Hz to 65,000,000 Hz for the MC16E cable
interface line card. The valid range for all other cable interface line cards that support NTSC operations
is 5,000,000 Hz to 42,000,000Hz.
The cable interface will not operate until you either set a fixed upstream frequency or create and
configure a spectrum group. Enter the fixed center frequency for your upstream RF carrier in Hz and
specify a port number from 0 to 5:
Router (config-int)# cable upstream port frequency up-freq-hz
Note Make sure that the selected upstream frequency does not interfere with the frequencies used for
any other upstream applications in your cable plant.
• Entering an upstream RF carrier frequency for each upstream port on a cable modem.
• Activating the RF carrier on each upstream port to support data from CMs or set top boxes on your
network to the Cisco uBR7200 series router. Enable upstream data traffic, using the following
command:
Router (config-int)# no cable upstream port shutdown
The specified upstream port LED lights.
Repeat the above for each upstream port to activate.
• Verifying your settings using the following command:
Router# show running-config
• Saving the configuration to nonvolatile random access memory (NVRAM) so that your settings are
retained after a power cycle:
Router# copy running start
• Verifying the upstream frequency, using the show controllers cable slot/port upstream command
for the upstream port you just configured.
• Verifying the downstream center frequency, using the show controllers cable slot/port
downstream command for the downstream port you just configured.