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High Upstream Receive Power - Internet Goes out every 10 minutes

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High Upstream Receive Power - Internet Goes out every 10 minutes

I have been without stable internet for about 3 weeks now. Could run for 10 minutes and my modem resets, or could run for an hour until it resets. Been on the phone with xfinity countless times at this point. 2 technicians have been out to my house now, saying everything checks out. Whenever I call customer service, the over the phone tech says says my upstream receive power should be between 0.5-1 dvmv but it’s currently running at 10-11 dbmv. The tech on the phone says all they have to do is adjust the line at the outside pedestal. I would think the first 2 techs would have done this. I have a 3rd tech coming out tomorrow. Is there anything I need to specify with him to ensure the 3rd visit fixes my issue? Very frustrating at this point as the techs running the scans on the phone can not communicate with the techs in the field. Should I have a tech running the scan on the phone while the tech is at my house? Any help/advice for this would be greatly appreciated.