Re: Arris SB8200 upstream not bound to DOCSIS 3.1 - power levels are too low according to Arris
I am having this same EXACT issue. Your numbers are identical to mine. I'm reporting them to BBB for false advertising. I've been troubleshooting this for 5 weeks. They keep resyncing the modem and that lasts for maybe 48 hours.
So frustrated to be lied to .