Hello,
I am seeking an engineering or maintenance escalation for a chronic upstream signal issue in the Southwest Florida area. Despite a prior technician visit three months ago that replaced the exterior drop and verified premise wiring, the connection continues to suffer from severe intermittent instability.
Symptoms Observed:
- Frequent T3 Timeouts: Modem logs consistently show "Started Unicast Maintenance Ranging - No Response received" events multiple times daily.
- CM-STATUS Code 22/23 Clusters: Frequent downstream profile changes and sync losses, often preceding a total connection drop.
- Total Bandwidth Collapse: During events, ethernet throughput drops to the Kbps range, even with a 2.5GbE connection directly to the modem.
- Intermittent Nature: Drops last between 10 seconds and 2 minutes. They are not tied to a specific time of day but occur while the line is under load and even during idle periods.
Troubleshooting Already Completed:
- Premise Verified: An onsite technician previously replaced the junction and the drop line to the house, confirming the signal was "fine" at the wall.
- Hardware Isolation: Issues persist when bypass testing with a PC connected via ethernet directly to the modem/router.
- Hardware Health: PC hardware and drivers (Realtek 2.5GbE) have been verified as healthy and up-to-date.
The pattern of these T3 clusters strongly suggests intermittent upstream noise (ingress) at the tap or node level rather than a fault within my household. I have months of logs documenting these specific timestamps.
Could a Community Specialist please help me escalate this for a Line Tech / Maintenance review to check the SNR levels at the street tap?
Thank you.
u/CleverFauxFox — 8 days ago