NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
CM1200 Modem Upstream LED Flashing - Spectrum Internet
I've had this modem for just over a year and it started dropping signal a couple days ago. The upstream LED was flashing green so I had a tech from Spectrum come out and check on everything. They pro...
Please post the Connection status page that gives the power levels seen on each channel.
Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
Be sure there are no coax cable line splitters in the between the modem and ISP service box.
Be sure your using good quality RG6 coax cable up to the modem.
Be sure to power OFF the modem for 1 minute them back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Modems/m-p/1530376#M12853
Thanks for the response.I'm assuming/hoping the tech made those checks when he was trying to get it working.
Connection status page attached.You would need to check to be sure.
Your power levels seems a bit high...
Heres mine:
Startup Procedure Procedure Status Comment Acquire Downstream Channel 837000000 Hz Locked Connectivity State OK Operational Boot State OK Operational Security Enabled BPI+ IP Provisioning Mode Honor MDD honorMdd(4) Downstream Bonded Channels Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables 1 Locked QAM256 31 837000000 Hz -2.5 dBmV 37 dB 0 0 2 Locked QAM256 1 651000000 Hz -2.5 dBmV 36.4 dB 0 0 3 Locked QAM256 2 657000000 Hz -2.6 dBmV 36.4 dB 0 0 4 Locked QAM256 3 663000000 Hz -2.3 dBmV 36.6 dB 0 0 5 Locked QAM256 4 669000000 Hz -2.3 dBmV 36.6 dB 0 0 6 Locked QAM256 5 675000000 Hz -2.1 dBmV 36.7 dB 0 0 7 Locked QAM256 6 681000000 Hz -2 dBmV 36.9 dB 0 0 8 Locked QAM256 7 687000000 Hz -1.8 dBmV 36.8 dB 0 0 9 Locked QAM256 8 693000000 Hz -1.7 dBmV 36.9 dB 0 0 10 Locked QAM256 9 699000000 Hz -1.5 dBmV 37 dB 0 0 11 Locked QAM256 10 705000000 Hz -1.5 dBmV 36.8 dB 0 0 12 Locked QAM256 11 711000000 Hz -1.3 dBmV 36.9 dB 0 0 13 Locked QAM256 12 717000000 Hz -0.8 dBmV 37.1 dB 0 0 14 Locked QAM256 13 723000000 Hz -1 dBmV 36.9 dB 0 0 15 Locked QAM256 14 729000000 Hz -0.7 dBmV 36.9 dB 0 0 16 Locked QAM256 16 741000000 Hz -0.6 dBmV 37.1 dB 0 0 17 Locked QAM256 17 753000000 Hz -0.7 dBmV 37.2 dB 0 0 18 Locked QAM256 18 759000000 Hz -0.9 dBmV 37.1 dB 0 0 19 Locked QAM256 19 765000000 Hz -1.3 dBmV 37.1 dB 0 0 20 Locked QAM256 20 771000000 Hz -1.3 dBmV 37.2 dB 0 0 21 Locked QAM256 21 777000000 Hz -1.5 dBmV 37.3 dB 0 0 22 Locked QAM256 22 783000000 Hz -1.7 dBmV 37.3 dB 0 0 23 Locked QAM256 23 789000000 Hz -1.7 dBmV 37.4 dB 0 0 24 Locked QAM256 24 795000000 Hz -1.9 dBmV 37.3 dB 0 0 25 Locked QAM256 25 801000000 Hz -2.1 dBmV 37.1 dB 0 0 26 Locked QAM256 26 807000000 Hz -2 dBmV 37.2 dB 0 0 27 Locked QAM256 27 813000000 Hz -2 dBmV 37.2 dB 0 0 28 Locked QAM256 28 819000000 Hz -2.4 dBmV 36.9 dB 0 0 29 Locked QAM256 29 825000000 Hz -2.3 dBmV 37.2 dB 0 0 30 Locked QAM256 30 831000000 Hz -2.3 dBmV 37.1 dB 0 0 31 Locked QAM256 32 843000000 Hz -2.5 dBmV 37 dB 0 0 32 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 Upstream Bonded Channels Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power 1 Locked ATDMA 1 5120 Ksym/sec 36000000 Hz 38.8 dBmV 2 Locked ATDMA 2 5120 Ksym/sec 29000000 Hz 37.5 dBmV 3 Locked ATDMA 5 5120 Ksym/sec 22000000 Hz 38 dBmV 4 Locked ATDMA 6 2560 Ksym/sec 16000000 Hz 37 dBmV 5 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 6 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 7 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 8 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV Downstream OFDM Channels Channel Lock
StatusModulation /
Profile IDChannel
IDFrequency Power SNR /
MERActive Subcarrier
Number RangeUnerrored
CodewordsCorrectable
CodewordsUncorrectable
Codewords1 Locked 0 ,1 ,2 33 547000000 Hz -4.0 dBmV 36.5 dB 1108 ~ 2987 107438938 87612859 0 2 Not Locked 0 0 0 Hz 0 dBmV 0.0 dB 0 ~ 4095 0 0 0 Thanks for that. They said the power seems fine (I just asked again). Is there anything I can do on the modem side to rule out it is not faulty? I want to be able to bring some ammo back to Spectrum so they can't punt it back. As of now their provided modem is working, so I don't have a lot of leverage.
