Arris SBG8300 Upstream QAM Speeds.
I bought an Arris SBG8300 modem/router in one last June and upgraded to Gigablast. We've had several Cox techs to the house to narrow down the root cause of slow speed and intermittent connectivity issues we have. We have a new large gauge wire (11?) from the post in our yard to our house. From there it is a direct line (no splitters) to our Arris. So .
I ran a speed test hard wired to the modem/router. Here are the result (23 DL, 33 UL...on gigablast 😞
When contacting Arris about the issue they seemed adamant that the Upstream power levels were the issue (all five approximately 34dbmv) as they are well below the minimum recommended of 45dbmv. They way I understand it, Cox should be telling the modem what upstream power it expects, so the issue could be that this specific model was spec'd out incorrectly in Cox's system. I say this after having had the issue with two of these same Arris's since last June coupled with the fact that the tech who saw this modem tonight acted like I had exposed electrical wires (anecdotal, but techs see a lot of different hardware, so I think there's possibly some good reason for his reaction).
What're the forum's thoughts? I don't want to just buy more hardware as I have a hefty sum invested in this one and Arris is not exactly making it easy to get a refund.