Constant Internet/TV dropouts Error messages on Netgear CM1150V

[DW101]

Help!  We have been having brief internet and TV outages.  They last a few seconds but happen 4-10 times a day. Wired internet (and wireless) as well as TV. My Netgear CM1150V shows Dynamic range error messages a "critical" unicast maintenace warning. We had been having them a few months ago and Comcast came out, determined we had a low signal and installed a new buried line to the house. This fixed things for about a month. It has been very diffcult to get any answer from Comcast this time around. They see the errors and reboot my modem, or do nothign at all.  Help!  Screenshots below...

[EG]

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[DW101]

Here are some of the error messages. 

Time	Priority	Description
Sat Jul 18 15:03:54 2020	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=28:80:88:d0:49:c0;CMTS-MAC=00:56:2b:77:1f:24;CM-QOS=1.1;CM-VER=3.1;
Sat Jul 18 15:03:30 2020	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=28:80:88:d0:49:c0;CMTS-MAC=00:56:2b:77:1f:24;CM-QOS=1.1;CM-VER=3.1;
Sat Jul 18 15:03:24 2020	Critical (3)	Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=28:80:88:d0:49:c0;CMTS-MAC=00:56:2b:77:1f:24;CM-QOS=1.1;CM-VER=3.1;
Sat Jul 18 15:03:08 2020	Warning (5)	Dynamic Range Window violation
Sat Jul 18 15:03:08 2020	Warning (5)	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=28:80:88:d0:49:c0;CMTS-MAC=00:56:2b:77:1f:24;CM-QOS=1.1;CM-VER=3.1;

[DW101]

A few of the dynamic range error messages.

Sat Jul 18 11:49:27 2020	Warning (5)	Dynamic Range Window violation
Sat Jul 18 11:49:27 2020	Warning (5)	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=28:80:88:d0:49:c0;CMTS-MAC=00:56:2b:77:1f:24;CM-QOS=1.1;CM-VER=3.1;
Sat Jul 18 11:48:27 2020	Warning (5)	Dynamic Range Window violation
Sat Jul 18 11:48:27 2020	Warning (5)	RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=28:80:88:d0:49:c0;CMTS-MAC=00:56:2b:77:1f:24;CM-QOS=1.1;CM-VER=3.1;
Sat Jul 18 11:48:07 2020	Warning (5)	Dynamic Range Window violation
Sat Jul 18 11:48:07 2020	Warning (5)	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=28:80:88:d0:49:c0;CMTS-MAC=00:56:2b:77:1f:24;CM-QOS=1.1;CM-VER=3.1;

[DW101]

Cable Connection Status...

Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables 1 Locked QAM256 37 669000000 Hz -1.4 dBmV 38.8 dB 5715 5108 2 Locked QAM256 9 501000000 Hz 1.3 dBmV 41.1 dB 29312 6744 3 Locked QAM256 10 507000000 Hz 1.3 dBmV 41.1 dB 28487 6655 4 Locked QAM256 11 513000000 Hz 1.3 dBmV 41.1 dB 24647 5927 5 Locked QAM256 12 519000000 Hz 1.2 dBmV 41 dB 20562 5282 6 Locked QAM256 13 525000000 Hz 1 dBmV 40.9 dB 28292 14799 7 Locked QAM256 14 531000000 Hz 1.1 dBmV 40.8 dB 20999 5336 8 Locked QAM256 15 537000000 Hz 0.9 dBmV 40.7 dB 21382 5372 9 Locked QAM256 16 543000000 Hz 0.8 dBmV 40.7 dB 20142 5331 10 Locked QAM256 17 549000000 Hz 0.7 dBmV 40.5 dB 19395 5303 11 Locked QAM256 18 555000000 Hz 0.6 dBmV 40.4 dB 18058 5043 12 Locked QAM256 19 561000000 Hz 0.5 dBmV 40.2 dB 17695 4961 13 Locked QAM256 20 567000000 Hz 0.4 dBmV 40.1 dB 15889 5064 14 Locked QAM256 21 573000000 Hz 0.2 dBmV 40 dB 16038 4995 15 Locked QAM256 22 579000000 Hz 0.1 dBmV 39.8 dB 14945 4709 16 Locked QAM256 23 585000000 Hz -0.1 dBmV 39.6 dB 14626 4939 17 Locked QAM256 24 591000000 Hz -0.3 dBmV 39.5 dB 13202 4763 18 Locked QAM256 25 597000000 Hz -0.2 dBmV 39.5 dB 12813 4807 19 Locked QAM256 26 603000000 Hz -0.4 dBmV 39.4 dB 11287 4690 20 Locked QAM256 27 609000000 Hz -0.6 dBmV 39.2 dB 10733 4846 21 Locked QAM256 28 615000000 Hz -0.8 dBmV 39 dB 11376 4844 22 Locked QAM256 29 621000000 Hz -0.8 dBmV 39.1 dB 10670 4901 23 Locked QAM256 30 627000000 Hz -0.8 dBmV 39.1 dB 8322 4628 24 Locked QAM256 31 633000000 Hz -0.9 dBmV 39 dB 8253 4691 25 Locked QAM256 32 639000000 Hz -1 dBmV 39 dB 7742 4866 26 Locked QAM256 33 645000000 Hz -1.1 dBmV 39 dB 7311 4873 27 Locked QAM256 34 651000000 Hz -1.1 dBmV 39 dB 6347 4684 28 Locked QAM256 35 657000000 Hz -1.2 dBmV 39 dB 6337 4885 29 Locked QAM256 36 663000000 Hz -1.3 dBmV 38.9 dB 5959 4879 30 Locked QAM256 38 675000000 Hz -1.5 dBmV 38 dB 6520 5949 31 Locked QAM256 39 681000000 Hz -1.6 dBmV 38.6 dB 5187 4833 32 Locked QAM256 40 687000000 Hz -1.5 dBmV 38.5 dB 5026 4775

Upstream Bonded Channels

Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power 1 Locked ATDMA 1 5120 Ksym/sec 16400000 Hz 40 dBmV 2 Locked ATDMA 2 5120 Ksym/sec 22800000 Hz 40.5 dBmV 3 Locked ATDMA 3 5120 Ksym/sec 29200000 Hz 40.5 dBmV 4 Locked ATDMA 4 5120 Ksym/sec 35600000 Hz 40.5 dBmV 5 Locked ATDMA 5 1280 Ksym/sec 40400000 Hz 41.8 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 Status Modulation / Profile ID Channel ID Frequency Power SNR / MER Active Subcarrier Number Range Unerrored Codewords Correctable Codewords Uncorrectable Codewords 1 Locked 0 159 722000000 Hz -1.1 dBmV 38.2 dB 1246 ~ 2849 3080944095 13497 73 2 Not Locked 0 0 0 Hz 0 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 0 0 0 Hz 0 dBmV 2 Not Locked 0 0 0 Hz 0 dBmV

[cnraghu]

Do you have any updates on this issue? I have same issue. Looks like the issue is not with the line. But with the modem CM1150v. I am having same issues and have to reboot everyday.  I switched back to my previous Arris SVG2482G and I don't see the issue from past 3-4 weeks. I am waiting for a replacement from Netgear. I will see if that resolves the issue. But I have my doubts. Looks like Netgear messed up firmware or this model is an expensive paperweight.