NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
CM 1000 T3 and T4 connection timeouts persistent for years now?
There are a number of similar posts and messages in this support forum regarding the same connection issues with the Netgear CM1000 DOCSIS 3.1 cable modem. It seems that the issues persist even year...
Something to have your ISP review with you to see if there is any issues.
Be sure ISP checks signal line quality and levels up to the modem.
Be sure there are no coax cable line splitters inbetween the modem and ISP service box.
I only have Internet service; i.e. single coax line. I did call to make sure the modem was provisioned correctly after I kept noticing service interruptions. Aside from the modem itself, I don't see anything else that's changed.
Additionally, I've also noticed the logs show warnings about dynamic range window violations.
The pertinent downstream/upstream info:
Upstream Bonded Channels Channel Lock Status Modulation Channel ID Frequency Power 1 Locked ATDMA 4 36800000 Hz 27.5 dBmV 2 Locked ATDMA 5 30350000 Hz 27.0 dBmV 3 Locked ATDMA 6 23900000 Hz 26.5 dBmV 4 Not Locked Unknown 0 0 Hz 0.0 dBmV 5 Not Locked Unknown 0 0 Hz 0.0 dBmV 6 Not Locked Unknown 0 0 Hz 0.0 dBmV 7 Not Locked Unknown 0 0 Hz 0.0 dBmV 8 Not Locked Unknown 0 0 Hz 0.0 dBmV Downstream OFDM Channels Channel Lock Status Modulation / Profile ID Channel ID Frequency Power SNR / MER Active Subcarrier Number Range Unerrored Codewords Correctable Codewords Uncorrectable Codewords 1 Locked 0, 255 159 651000000 Hz 18.4 dBmV 33.3 dB 646 ~ 3449 1906011210 1481183335 824 2 Not Locked 0, 255 0 0 Hz 3.4 dBmV 0.0 dB 0 ~ 4095 0 0 0 Upstream OFDMA Channels Channel Lock Status Modulation / Profile ID Channel ID Frequency Power 1 Not Locked Unknown 0 0 Hz 0 dBmV 2 Not Locked Unknown 0 0 Hz 0 dBmV