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whosta's avatar
whosta
New Contributor

Upload speed Issues

I've been having issues for a couple months with my upload speed dropping. I had a tech out today and he resolved an issue in the line and fixed the power levels on the modem, but the upload issue still persists. After he left, everything worked perfectly for an hour before the upload speed dropped back down to under 1mb/s. I enjoy streaming online games and an upload speed that slow is unacceptable! Before today the power levels on the downstream bonded channels were -22 -  -23 with high codewords on certain channels. Now I'm curious about the Downstream OFDM. I don't know the range it's supposed to be operating in or what effects it and don't know how to fix my issue. I think I might have the wrong firmware on my modem as well. On my end it's Firmware Version V6.01.07, and from what I understand it's supposed to be 3.01.04? Should I factory reset my modem? I have Gigablast with a Netgear cm1000 modem.

Could the issue be old wiring coming into the house? I'm running out of patience and if I have to deal with customer service one more time I might lose my sanity.

<tabindex=-1>Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR / MER Unerrored Codewords Correctable Codewords Uncorrectable Codewords
1 Locked QAM256 9 831000000 Hz -0.8 dBmV 40.1 dB 132898428 0 0
2 Locked QAM256 1 783000000 Hz 0.2 dBmV 39.2 dB 131935730 0 0
3 Locked QAM256 2 789000000 Hz 0.4 dBmV 39.5 dB 131939197 0 0
4 Locked QAM256 3 795000000 Hz -0.2 dBmV 39.6 dB 131943269 0 0
5 Locked QAM256 4 801000000 Hz 0.0 dBmV 39.6 dB 131946736 0 0
6 Locked QAM256 5 807000000 Hz -0.1 dBmV 39.8 dB 131950246 0 0
7 Locked QAM256 6 813000000 Hz -0.4 dBmV 40.0 dB 131954105 0 0
8 Locked QAM256 7 819000000 Hz -0.6 dBmV 40.1 dB 131956851 0 0
9 Locked QAM256 8 825000000 Hz -1.1 dBmV 40.0 dB 131961146 0 0
10 Locked QAM256 10 837000000 Hz -0.9 dBmV 39.6 dB 131965270 0 0
11 Locked QAM256 11 843000000 Hz -1.0 dBmV 39.1 dB 131969242 0 0
12 Locked QAM256 12 849000000 Hz -1.1 dBmV 38.6 dB 131972594 0 0
13 Locked QAM256 13 855000000 Hz -0.9 dBmV 38.1 dB 131976695 0 0
14 Locked QAM256 14 861000000 Hz -1.1 dBmV 37.7 dB 131979976 0 0
15 Locked QAM256 15 867000000 Hz -1.0 dBmV 37.2 dB 131984527 0 0
16 Locked QAM256 16 873000000 Hz -1.0 dBmV 37.1 dB 131987000 0 0
17 Locked QAM256 33 357000000 Hz -0.3 dBmV 40.2 dB 131991227 0 0
18 Locked QAM256 34 363000000 Hz -0.4 dBmV 40.0 dB 131995066 0 0
19 Locked QAM256 35 369000000 Hz -0.3 dBmV 40.6 dB 131998967 0 0
20 Locked QAM256 36 375000000 Hz -0.3 dBmV 40.6 dB 132002452 0 0
21 Locked QAM256 37 381000000 Hz -0.5 dBmV 40.3 dB 132006138 0 0
22 Locked QAM256 38 387000000 Hz -0.6 dBmV 40.2 dB 132009915 0 0
23 Locked QAM256 39 393000000 Hz -0.5 dBmV 40.3 dB 132013925 0 0
24 Locked QAM256 40 399000000 Hz -0.4 dBmV 40.3 dB 132017346 0 0
25 Locked QAM256 41 405000000 Hz -0.5 dBmV 40.3 dB 132021187 0 0
26 Locked QAM256 42 411000000 Hz -0.5 dBmV 40.0 dB 132025101 0 0
27 Locked QAM256 43 417000000 Hz -0.7 dBmV 40.0 dB 132028277 0 0
28 Locked QAM256 44 423000000 Hz -0.4 dBmV 40.2 dB 132032520 0 0
29 Locked QAM256 45 429000000 Hz -0.4 dBmV 40.1 dB 132035374 0 0
30 Locked QAM256 46 435000000 Hz -0.4 dBmV 39.9 dB 132039167 0 0
31 Locked QAM256 47 441000000 Hz -0.5 dBmV 39.9 dB 132041145 0 0
32 Locked QAM256 48 447000000 Hz -0.7 dBmV 39.8 dB 132041389 0 0

<tabindex=-1>Upstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power
1 Locked ATDMA 1 17700000 Hz 39.5 dBmV
2 Locked ATDMA 2 24100000 Hz 40.0 dBmV
3 Locked ATDMA 3 30500000 Hz 41.8 dBmV
4 Locked ATDMA 4 36900000 Hz 40.5 dBmV
5 Locked ATDMA 6 12900000 Hz 39.8 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

<tabindex=-1>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, 1, 2, 3 159 300000000 Hz 4.1 dBmV 41.8 dB 1108 ~ 2987 145198652 41091032 0
2 Not Locked 0 0 0 Hz -0.3 dBmV 0.0 dB 0 ~ 4095 0 0 0

<tabindex=-1>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

9 Replies

  • We can attempt to push a firmware update to see if this will help, though V6.01.07 is approved by Cox. If issues arise after attempting a firmware push, then you may need to perform a factory reset to your Cable Modem. Do you have a signal amplifier attached to the coaxial cable or is there a splitter or barrel attached to the cable?

    Dustin
    Cox Forum Support Moderator
    • whosta's avatar
      whosta
      New Contributor

      The modem is connected directly to the wall. I had a tech out here yesterday and he bypassed the amplifier coming into the house (recently canceled TV service and the amp was causing noise in the line) which seemed to fix the issue for about an hour. I called NETGEAR a few days ago and they said the firmware for Cox should be v3.01.04.

      If I do a factory reset on the modem, will it update automatically when I reconnect it or do I have to get ahold of Cox to get it updated?

    • whosta's avatar
      whosta
      New Contributor

      I went ahead and did a factory reset on the modem and it did update automatically to v6.01.07 firmware.

      This is the event log on my modem

      2020-10-15, 16:26:48 Notice (6) DS profile assignment change. DS Chan ID: 32; Previous Profile: 1; New Profile: 1 2 3.;CM-MAC=3c:37:86:e7:c9:60;CMTS-MAC=00:59:dc:78:f5:5a;CM-QOS=1.1;CM-VER=3.1;
      2020-10-15, 16:26:17 Warning (5) Dynamic Range Window violation
      2020-10-15, 16:26:17 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=3c:37:86:e7:c9:60;CMTS-MAC=00:59:dc:78:f5:5a;CM-QOS=1.1;CM-VER=3.1;
      2020-10-15, 16:26:17 Warning (5) Dynamic Range Window violation
      2020-10-15, 16:26:17 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=3c:37:86:e7:c9:60;CMTS-MAC=00:59:dc:78:f5:5a;CM-QOS=1.1;CM-VER=3.1;
      2020-10-15, 16:26:17 Warning (5) Dynamic Range Window violation
      2020-10-15, 16:26:17 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=3c:37:86:e7:c9:60;CMTS-MAC=00:59:dc:78:f5:5a;CM-QOS=1.1;CM-VER=3.1;
      2020-10-15, 16:26:17 Warning (5) Dynamic Range Window violation
      2020-10-15, 16:26:17 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=3c:37:86:e7:c9:60;CMTS-MAC=00:59:dc:78:f5:5a;CM-QOS=1.1;CM-VER=3.1;
      2020-10-15, 16:26:11 Notice (6) DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1.;CM-MAC=3c:37:86:e7:c9:60;CMTS-MAC=00:59:dc:78:f5:5a;CM-QOS=1.1;CM-VER=3.1;
      2020-10-15, 16:26:06 Notice (6) TLV-11 - unrecognized OID;CM-MAC=3c:37:86:e7:c9:60;CMTS-MAC=00:59:dc:78:f5:5a;CM-QOS=1.1;CM-VER=3.1;
      2020-10-15, 16:26:06 Warning (5) DHCP WARNING - Non-critical field invalid in response ;CM-MAC=3c:37:86:e7:c9:60;CMTS-MAC=00:59:dc:78:f5:5a;CM-QOS=1.1;CM-VER=3.1;
      Time Not Established Notice (6) Honoring MDD; IP provisioning mode = IPv4
      Time Not Established Warning (5) Lost MDD Timeout;CM-MAC=3c:37:86:e7:c9:60;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
      Time Not Established Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=3c:37:86:e7:c9:60;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
      Time Not Established Warning (5) Lost MDD Timeout;CM-MAC=3c:37:86:e7:c9:60;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
      Time Not Established Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=3c:37:86:e7:c9:60;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
      • JonathanJ's avatar
        JonathanJ
        Former Moderator
        @whosta

        Are you hardwired directly to the modem, router, or VPN? If not hardwired directly to the modem please bypass, reset and check the logs.



        Jonathan J
        Cox Moderator