Visitor

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2 Messages

10/03/2026 6:08 PM

Random disconnected.

Changed modem and router. Had 2 different techs come check my line. I get alot of error in the modem logs.

SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-

Tons of these 

DS profile assignment change. DS Chan ID: 33; Previous Profile: ; New Profile: 1 2 3.;CM-

Dynamic Range Window violation

RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-

This has been going on for 4 weeks and seems no one can fix it. 

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Official Employee

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2.5K Messages

5 days ago

Hello @user_isa27c since the issue was not resolved after the appointments, please send us a direct message, so we can assist you further. Please include your name and service address. To do so, click on the chat icon located at the top right of this forum's page.

 

Here are the detailed steps to direct message us:

  • Click "Sign In" if necessary
  • Click the "Direct Message” icon (upper right corner of this page)
  • Click the "Start new conversation" (pencil and paper) icon
  • Type "Xfinity Support" in the "to" line and select "Xfinity Support" from the drop-down list
  • Type your message in the text area near the bottom of the window
  • Press Enter to send your message

    You can see how to send us a direct message here,

https://forums.xfinity.com/conversations/guidelines/how-to-direct-messaging-within-the-forum/697ba1….

Expert

 • 

122K Messages

5 days ago

@user_isa27c @XfinityJosephA 

Please circle back here and post any possible solutions for the issue here in these open public forums so that all readers here may benefit from the exchange / info. This is in keeping with the spirit for which these public help forums were originally intended. Thank you.

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