I tried posting on the direct but haven’t gotten a reply. Sunday night our modem suddenly stopped locking about 7 channels and our gigabit service was only pushing 30mbps down/40up which on Wi-Fi in the weaker parts of the house ground to a whopping 0.6mbps down.
We rebooted everything. We have a brand new router (ASUS AC88U) that has been rock solid for 2 months. Modem is SB8200. Initiated tech chat Sunday at midnight. They rebooted twice and “sent signal” and told me my signal came back “red” and I would need a tech. Appointment is Thurs.
Not excited about a stranger in the house during Covid when we can’t open the windows and have everything sealed very tight due to smoke. But... we also need to work from home as our offices are closed.
Yesterday we took the modem and plugged it in above the splitter in our master closet where the line comes in from outside our garage (can’t go outside fire smoke too thick) and wired directly to the modem got full gigabit speed. So we wired the modem after the splitter but before the line that goes down to the office. Full speeds all channels locked. Fixed everything back up in the office downstairs from the junction. Full speed all channels locked. We celebrate not needing a stranger in the house but I figured I’ll keep the appointment for now just in case. 2 hours later 7 channels not locked and millions of uncorrectables.
Today we wired everything back above the splitter and after the splitter just the modem to my laptop wired and everything locked and zero correctables/uncorrectables. I watched YouTube in 4K for an hour wired pre-splitter and post splitter and no problems. Also ran the X1 box on the tv to pull more signal through the splitter and no problems.
Next step is to add the router to the mix at the hub before and after the splitter.
Is it at all possible the router could be causing the downstream issues? Is this characteristic of the splitter (Comcast installed Extreme brand)? Would a cheapo splitter from Home Depot be worth testing (I know they say to get high quality but it’s 3 blocks away).
Just trying to make sure I’ve got all my bases covered before someone comes to the house to make sure we get what we need. And hopefully rule out any possibilities of faulty wiring inside. House is from 2011 so the coax is all newer. It’s a 3 story townhouse/rowhouse so it would be very difficult to rerun the coax to the office of our line went bad. Really hope that’s not what’s going on.
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