OFDM Channel not locked - Downstream light consistently blinking now
Exact same was posted a few months ago but the thread is locked and it failed to highlight a tangible solution.
We have the same Netgear Modem CM1200, the same symptoms of constantly blinking light, and massive amounts of disconnections and lost packets.
Technicians tell the same story; our signal looks good therefore it must be the Modem. The last technician recommended we get a firmware update for the modem but that cannot be done because modem updates should be pushed by the ISP. We cannot update our firmware.
Our logs suggest the issue is on Cox side. DOCSIS 3.1 not working?
|Mon Dec 13 17:06:43 2021||Notice (6)||CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=08:36:c9:a3:b9:e0;CMTS-MAC=00:29:c2:00:57:92;CM-QOS=1.1;CM-VER=3.1;|
|Mon Dec 13 17:06:09 2021||Critical (3)||Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:a3:b9:e0;CMTS-MAC=00:29:c2:00:57:92;CM-QOS=1.1;CM-VER=3.1;|
This has been going on for several months now - and we keep changing hardware, cables, splitters, router, modem - yet the problem persists.
As a side not, we are part of the legacy Cable America folks that were acquired by Cox. Time to refresh the infrastructure?