Visitor

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1 Message

08/22/2026 12:46 AM

Netgear CM3000 Upstream OFDMA Channel Not Locking

Hello team, I recently installed a customer-owned Netgear Nighthawk CM3000 modem on my account. My downstream channels are locking and performing well, but my upstream OFDMA channels are showing as "Not Locked" in the modem status page, leaving me restricted to legacy ATDMA channels.

Could an official employee please check my account's bootfile and provisioning to ensure the correct Next-Gen upload speed profile is pushed to my modem? Thank you!

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Official Employee

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400 Messages

19 days ago

@user_5i89v7 Hello, and thank you for reaching out. I appreciate the detailed information you've provided regarding your CM3000 modem and the upstream issue. I just wanted to ask a few questions. Did you utilize the Xfinity app to activate your new modem? Have you attempted to restart the modem or any routers associated with your setup?

Expert

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120.9K Messages

19 days ago

@XfinityCarolyn 

What would a LAN side router have to do with  a RF DOCSIS WAN side system issue ??? 

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