Intermittent Connection Drops "Started Unicast Maintenance Ranging - No Response received - T3 time-out"

thank you for replying, yes I have tried power cycling my modem. I have also checked my coax cable connections up to the wall. 

I am using an EERO router for my devices. 

The issue first started happening I'd say about 1-2 weeks ago. No change to my equipment whatsoever so I was confused when it started happening

Thank you for confirming that you have tried power cycling your modem and checked the coax cable connections up to the wall @user_rc5230. Let's take a closer look at your signal levels and network health. To get started, can you please end us a Direct Message with your first and last name along with the service address on the account?

To send a "Direct Message" ("Private") message:

Click "Sign In" if necessary

• Click the "Direct Message chat" icon
• Click the "New message" (pencil and paper) icon
• Type "Xfinity Support" in the "To:" line and select "Xfinity Support" from the drop-down list which appears. The "Xfinity Support" graphic replaces the "To:" line
• Type your message in the text area near the bottom of the window
• Press Enter to send it

done! thank you, how long should i wait for a reply?

@user_rc5230 We have responded to your message. Since it's not an instant one-on-one chat, so there may be brief delays as we assist other customers, type our responses, and catch up on the conversation. We look forward to assisting you in private messaging. 

@user_rc5230​ wrote;

3) he connected a splitter to the coax cable coming from the wall to help bring my upstream power levels down, even though he took the attenuator off it was still on the high side

Doing that would raise the upstream power, not lower it.

That said. You need to get the techs re-involved with this problem ! Bear in mind that if the premises facing techs can not find or fix a problem at your home, it is they who are responsible for escalating it up to their line / network / maintenance dept. techs. The problem may lie beyond your home in the local neighborhood infrastructure somewhere but it is their S.O.P. to start at the home. And if the problem is found to be on their side of the demarcation point, there will not be any charge.

Good luck !