Logged errors, upstream desync

Upstream light on Motorola MB8611 started blinking, around Feb 6th. Restarted the modem, cleared it up. Started again, randomly, over the next week. MB8611 event log caught it at 11:52:37 Tue Feb 13 2024 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 3;CM-MAC=XX:XX:XX:XX:XX; CMTS-MAC=XX:XX:XX:XX:XX:XX; CM-QOS=1.1; CM-VER=3.1. Multiple errors logged rest of the day, on Feb 13 and on Feb 14, such as SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=XX:XX:XX:XX:XX:XX:XX; CMTS-MAC=XX:XX:XX:XX:XX:XX; CM-QOS=1.1; CM-VER=3.1. No Ranging Response received - T3 timeout; CM-MAC=XX:XX:XX:XX:XX:XX:XX; CMTS-MAC=XX:XX:XX:XX:XX:XX; CM-QOS=1.1; CM-VER=3.1. Started Unicast Maintenance Ranging - No Response received - T3 timeout; CM-MAC=XX:XX:XX:XX:XX:XX:XX; CMTS-MAC=XX:XX:XX:XX:XX:XX; CM-QOS=1.1; CM-VER=3.1.

These errors continued, intermittently, until Feb 21, when a tech arrived, that I'd finally managed to get scheduled. He checked the signals on the coax, inside my apartment, found a splitter that he removed as it wasn't needed, discovered that the line that was in use was bad and swapped to the second pre-installed line to the wall plate. Checked the signals again and showed his handheld oscilloscope to me, to let me know that he'd gotten that problem dealt with. He went outside, checked the equipment boxes, replaced the underground cable, from those boxes out to the pedestal, as that cable was very old. At that point, everything looked good and I didn't have any more trouble until the next afternoon.

Timing Sync failure - Failed to acquire QAM-QSPK symbol timing; CM-MAC=XX:XX:XX:XX:XX:XX:XX; CMTS-MAC=XX:XX:XX:XX:XX:XX; CM-QOS=1.1; CM-VER=3.1 (Logged 3 consecutive times).

Next entry No Ranging Response received - T3 timeout; CM-MAC=XX:XX:XX:XX:XX:XX:XX; CMTS-MAC=XX:XX:XX:XX:XX:XX; CM-QOS=1.1; CM-VER=3.1 followed by SYNC Timing Synchronization failure - Loss of Sync; CM-MAC=XX:XX:XX:XX:XX:XX:XX; CMTS-MAC=XX:XX:XX:XX:XX:XX; CM-QOS=1.1; CM-VER=3.1. Happened at 13:26:49 Thu Feb 22.

At 13:32:43 entry reads Notice (6) DS profile assignement change. DS Chan ID:32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=XX:XX:XX:XX:XX:XX:XX; CMTS-MAC=XX:XX:XX:XX:XX:XX; CM-QOS=1.1; CM-VER=3.1.

Also at 13:32:43 entry reads SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=XX:XX:XX:XX:XX:XX:XX; CMTS-MAC=XX:XX:XX:XX:XX:XX; CM-QOS=1.1; CM-VER=3.1.

13:32:51 Thu Feb 22 2024 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW: CM-MAC=XX:XX:XX:XX:XX:XX:XX; CMTS-MAC=XX:XX:XX:XX:XX:XX; CM-QOS=1.1; CM-VER=3.1

13:32:51 Thu Feb 22 2024 Warning (5) Dynamic Range Window violation

Those two repeated numerous times. Tried explaining things to a few people via Live chat, via phone conversation, which resulted in several hours of wasted time and a large amount of frustration. I was promised, by 3 agents that I'd get a call back, another disconnected me, after having me on hold for nearly an hour. Late Friday afternoon, I called again, in hopes of getting someone that would actually listen. Didn't work out as I hoped. I agreed to pick up a Xfinity gateway and give it a try, which I did. Wound up with another headache, trying to get it (xb8) setup and running. Called support wanting to know the IP address, how to split the Wifi channels and why the 6GHz signal wasn't showing up. Got the IP address, tried to split the channels following directions given, to no avail and I gave up until Saturday. I did note that the event logs for the xb8 showed the same errors I had gotten on my Motorola MB8611. At least, until I wasn't able to access any log file but the system logs. No help there. Logged in on my Xfinity account, clicked on billing. It tried loading 5 times and I got a message that I'd been logged out. Tried the phone app, same result. Turned off wifi on my phone and was able to get into billing. At the same time all this is going on, I was getting errors logging into my Verizon account, as well. In the meantime, after being told by one person I spoke with to check with the manufacturer of my Motorola, I tried to find any current support info on it, only to find that Zoom Telephonics, the company that built had been merged into Minim and they had laid off 41 of 50 employees. When the Netgear CM2000 got here, this past Saturday (I'd ordered it, prior to picking up the xb8), I got it set up, activated and operating. Took a phone call to get thing straight on my account, so it would work at full speed. Imagine my dismay, when I check the event log of the CM2000 and find this:

Sat Mar 02 23:12:27 2024 (Warning (5)) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=xx:xx:xx:xx:xx:xx;;CMTS-MAC=xx:xx:xx:xx:xx:xx;;CM-QOS=1.1;CM-VER=3.1;

Can anyone tell me what is going on? Of the three techs that have been here, only the first one actually did anything. The third one told me that he'd check the pedestal, called his boss and talked to him and said his boss told him that it was likely a microwave oven causing the problem or electrical wiring feedback. The former is likely to slow roast anyone near a microwave and the latter tells me there's a bad ground, belonging to Xfinity and possibly one belonging to Duke Energy. Neither of which I can fix. Apartment maintenance told me that they can't touch Duke's equipment, not even to reconnect a loose ground wire to a ground rod.

I need some help, please. Apologies for the font change, it wasn't intentional and I can't change it back, to what it was.