Intermittent Critical Modem Events
Recently I have been encountering upstream issues which appear to be tied to critical priority (tier 3) events in my modem's event log. I can still hear people talking to me over VoIP, but I cannot talk, and I cannot open new connections, such as opening a browser and accessing a web page.
My equipment: Netgear CM1200
The main errors I encounter:
- SYNC Timing Synchronization failure - Loss of Sync
- Received Response to Broadcast Maintenance Request, but no Unicast Maintenance opportunities received - T4 time out
- No Ranging Response received - T3 time-out
I'm also getting some non-critical errors I think may be of significance:
- REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value
- RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW
- Dynamic Range Window violation
These issues don't just occur during the day with increased use due to covid (alongside the increased ping and packet loss) - they will also happen randomly at say 4AM, when almost nobody is using the internet. These events are a complete loss of internet access, where during the day I can still access the internet. Many times the upstream light on my modem will start to blink (not always).
Sometimes, when I look at my ping to google which I constantly log for diagnostics, I'll see that the packet loss is on and off about every other second. During these situations, my internet is functioning barely. Some web pages will load slowly as it gets trickled in through the constant packet loss and loss of internet.
No one else is using the internet in my house during these times, so I can safely say it's not an in-home use scenario.
How do I get someone to come out who has some actual technical knowledge that can troubleshoot this for me? I had a technician out today and it seems like he doesn't really know too much other than how to plug their device into the tap/coax in my house and tell me 'it looks good right now'. Not 30 minutes later and it's happening again to me.
I have a feeling it's something to do with their lines up to my house, or perhaps the local node. But I don't want to jump to conclusions.
