NETGEAR CM500 User Manual page 20

5. In the Starting Frequency field, type a number as instructed by Comcast Xfinity.
WARNING:
Do not change the starting frequency unless Comcast Xfinity
instructs you to do so. Changing the starting frequency incorrectly
causes serious connection and Internet problems.
6. Click the Apply button.
Your change takes effect.
CM500 High Speed Cable Modem
Manage and Monitor
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