Installation guide

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Release Notes for Cisco uBR7200 Series for Cisco IOS Release 12.1 T
78-10643-04 Rev. B0
New and Changed Information
occurs, instead of making large power adjustments for each correction, you can configure the
Cisco uBR7200 series router to calculate the average value of the power corrections before making
power adjustments.
– The cable upstream power-adjust threshold command now accepts a range of 0–10 dB. The
previous range was 0–2 dB.
– The cable upstream power-adjust noise % of power adjustment command sets the threshold
value (in percent) for a particular upstream switching between regular power adjustments and
the noise power adjustment method (which uses an averaging algorithm before sending any
correction).
– The cable upstream frequency-adjust averaging % of frequency adjustment command sets
the threshold (in percent) for a particular upstream switching between regular frequency
adjustments and the average frequency adjustment method (which uses an averaging algorithm
before sending any correction).
• The show cable modem command now supports a number of new options:
– show cable modem detail adds signal/noise ratio (SNR) information for each cable modem on
each interface
– show cable modem summary displays the total number of modems connected for each
upstream channel, including the number of currently active modems
– show cable modem [ interface [ upstream number ] ] displays the total number of modems
for the specified interface or upstream
– show cable modem [ interface [ upstream number ]]registered displays the total number of
registered modems for the specified interface or upstream
– show cable modem [ interface [ upstream number ]]unregistered displays the total number
of unregistered modems for the specified interface or upstream
– show cable modem [ interface [ upstream number ] ] offline displays the total number of
offline modems for the specified interface or upstream, including status information for each
modem before going offline and the time each modem went offline
• The cable downstream if-output command is enhanced with the following options to generate test
signals on the downstream interface:
– cable downstream if-output prbs shuts down the downstream interface and outputs a PRBS
test signal
– cable downstream if-output continuous-wave shuts down the downstream interface and
outputs an unmodulated carrier signal
The previous cable downstream if-output command has not changed and continues to output a
standard modulated signal. The no cable downstream if-output command also has not
changed—it stops all signal output and shuts down the interface.
• A new command changes the cable modem registration value (the T9 timer). The cable
registration-timeout minutes command sets the T9 timer to the new value (from 2 to 60 minutes).
The no cable registration-timeout command resets the T9 timer to its default of 3 minutes.
• Cisco IOS software has a number of new and enhanced commands to support the point-to-point
wireless modem card. For more information, refer to the Cisco uBR7200 Series Wireless Modem
Card and Subsystem Installation and Configuration publication.