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NeroNoctis's avatar
NeroNoctis
New Contributor

High upstream and too many t3/t4 errors.

I've been having bad internet connectivity the last couple of months and I think it's because the upstream is way too high(or so I read).I have a Netgear cm1000 that i recently bought and installed a little over a month ago I've replaced the coax cable and the splitter inside the house and connected the modem directly to the coax coming into the house but there isn't a difference. I think a tech has to come out and see for themselves but trying through calling Cox seems like a waste since they just tell you to power cycle. Any ideas on how to fix this?

<tabindex=-1>Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 807000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Security Enable BPI+
IP Provisioning Mode Honor MDD IPv4 only
<tabindex=-1>Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR / MER Unerrored Codewords Correctable Codewords Uncorrectable Codewords
1 Locked QAM256 5 807000000 Hz 9.1 dBmV 43.9 dB 29035826 0 0
2 Locked QAM256 1 783000000 Hz 9.0 dBmV 44.1 dB 44344786 0 0
3 Locked QAM256 2 789000000 Hz 9.4 dBmV 44.1 dB 44348633 0 0
4 Locked QAM256 3 795000000 Hz 9.1 dBmV 44.0 dB 44352221 0 0
5 Locked QAM256 4 801000000 Hz 9.1 dBmV 43.8 dB 44341324 0 0
6 Locked QAM256 33 357000000 Hz 2.8 dBmV 42.5 dB 25789229 0 0
7 Locked QAM256 6 813000000 Hz 8.9 dBmV 43.8 dB 44362764 0 0
8 Locked QAM256 7 819000000 Hz 8.8 dBmV 43.8 dB 44367659 0 0
9 Locked QAM256 8 825000000 Hz 8.5 dBmV 43.8 dB 44372679 0 0
10 Locked QAM256 9 831000000 Hz 8.8 dBmV 43.8 dB 44376405 0 0
11 Locked QAM256 10 837000000 Hz 8.6 dBmV 43.9 dB 44380521 0 0
12 Locked QAM256 11 843000000 Hz 8.7 dBmV 43.7 dB 44384327 0 0
13 Locked QAM256 12 849000000 Hz 8.1 dBmV 43.6 dB 44387831 0 0
14 Locked QAM256 13 855000000 Hz 7.9 dBmV 43.1 dB 44391920 0 0
15 Locked QAM256 14 861000000 Hz 7.9 dBmV 43.3 dB 44395100 0 0
16 Locked QAM256 15 867000000 Hz 8.3 dBmV 43.5 dB 44398911 0 0
17 Locked QAM256 16 873000000 Hz 8.4 dBmV 42.9 dB 44403040 0 0
18 Locked QAM256 34 363000000 Hz 2.8 dBmV 42.7 dB 25887286 0 0
19 Locked QAM256 35 369000000 Hz 2.8 dBmV 42.8 dB 25894905 0 0
20 Locked QAM256 36 375000000 Hz 3.1 dBmV 43.0 dB 25902539 0 0
21 Locked QAM256 37 381000000 Hz 3.2 dBmV 42.7 dB 25909584 0 0
22 Locked QAM256 38 387000000 Hz 3.2 dBmV 42.8 dB 25917445 0 0
23 Locked QAM256 39 393000000 Hz 3.6 dBmV 43.0 dB 25924752 0 0
24 Locked QAM256 40 399000000 Hz 3.6 dBmV 43.0 dB 25932111 0 0
25 Locked QAM256 41 405000000 Hz 3.9 dBmV 43.2 dB 25939263 0 0
26 Locked QAM256 42 411000000 Hz 4.2 dBmV 43.3 dB 25946974 0 0
27 Locked QAM256 43 417000000 Hz 4.6 dBmV 43.5 dB 25953830 0 0
28 Locked QAM256 44 423000000 Hz 4.6 dBmV 43.5 dB 25961321 0 0
29 Locked QAM256 45 429000000 Hz 4.6 dBmV 43.5 dB 25969263 0 0
30 Locked QAM256 46 435000000 Hz 4.4 dBmV 43.3 dB 25976770 0 0
31 Locked QAM256 47 441000000 Hz 4.3 dBmV 43.2 dB 25979699 0 0
32 Locked QAM256 48 447000000 Hz 4.3 dBmV 43.0 dB 25996283 0 0
<tabindex=-1>Upstream Bonded Channels (Partial Service)
Channel Lock Status Modulation Channel ID Frequency Power
1 Locked ATDMA 1 36300000 Hz 55.8 dBmV
2 Locked ATDMA 2 29900000 Hz 55.8 dBmV
3 Locked ATDMA 3 23500000 Hz 54.5 dBmV
4 Locked ATDMA 4 16900000 Hz 53.3 dBmV
5 Locked ATDMA 5 60000000 Hz 49.0 dBmV
6 Locked ATDMA 6 67000000 Hz 55.0 dBmV
7 Locked ATDMA 7 74000000 Hz 55.8 dBmV
8 Locked ATDMA 8 81000000 Hz 55.8 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 1.3 dBmV 38.8 dB 1108 ~ 2987 52545143 21655784 8227
2 Not Locked 0 0 0 Hz -2.9 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
Current System Time: Sat Jan 29 14:35:28 2022
System Up Time: 0:17:50

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  • NeroNoctis's avatar
    NeroNoctis
    New Contributor

    So I called Cox and they sent a contractor that said the wiring and connection are good, he proceeded to put a DB Attenuator behind my modem. It's changed my downstream but now my upstream and connection seems to be worse.

    Frequency start Value
    This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect.
    Starting Frequency
    <tabindex=-1>Startup Procedure
    Procedure Status Comment
    Acquire Downstream Channel 951000000 Hz Locked
    Connectivity State OK Operational
    Boot State OK Operational
    Security Enable BPI+
    IP Provisioning Mode Honor MDD IPv4 only
    <tabindex=-1>Downstream Bonded Channels
    Channel Lock Status Modulation Channel ID Frequency Power SNR / MER Unerrored Codewords Correctable Codewords Uncorrectable Codewords
    1 Locked QAM256 29 951000000 Hz 3.0 dBmV 44.3 dB 34904122 0 0
    2 Locked QAM256 1 783000000 Hz 4.0 dBmV 44.7 dB 32342713 0 0
    3 Locked QAM256 2 789000000 Hz 4.1 dBmV 44.7 dB 32347068 0 0
    4 Locked QAM256 3 795000000 Hz 3.8 dBmV 44.4 dB 32350078 0 0
    5 Locked QAM256 4 801000000 Hz 3.8 dBmV 44.6 dB 32353028 0 0
    6 Locked QAM256 5 807000000 Hz 4.0 dBmV 44.6 dB 32357179 0 0
    7 Locked QAM256 6 813000000 Hz 4.0 dBmV 44.6 dB 32360329 0 0
    8 Locked QAM256 7 819000000 Hz 3.8 dBmV 44.5 dB 32364240 0 0
    9 Locked QAM256 8 825000000 Hz 3.4 dBmV 44.4 dB 32366216 1501 431
    10 Locked QAM256 9 831000000 Hz 3.4 dBmV 44.3 dB 32371696 459 44
    11 Locked QAM256 10 837000000 Hz 3.4 dBmV 44.5 dB 32375377 0 0
    12 Locked QAM256 11 843000000 Hz 3.6 dBmV 44.5 dB 32379198 0 0
    13 Locked QAM256 12 849000000 Hz 3.5 dBmV 44.6 dB 32382613 0 0
    14 Locked QAM256 13 855000000 Hz 3.2 dBmV 44.0 dB 32386898 0 0
    15 Locked QAM256 14 861000000 Hz 3.0 dBmV 44.2 dB 32390203 0 0
    16 Locked QAM256 15 867000000 Hz 3.1 dBmV 44.3 dB 32394492 0 0
    17 Locked QAM256 16 873000000 Hz 3.1 dBmV 43.5 dB 32397712 0 0
    18 Locked QAM256 17 879000000 Hz 3.2 dBmV 43.8 dB 32401736 0 0
    19 Locked QAM256 18 885000000 Hz 3.2 dBmV 44.1 dB 32405062 0 0
    20 Locked QAM256 19 891000000 Hz 3.3 dBmV 44.3 dB 32409189 0 0
    21 Locked QAM256 20 897000000 Hz 3.3 dBmV 44.5 dB 32412899 0 0
    22 Locked QAM256 21 903000000 Hz 3.4 dBmV 44.4 dB 32416192 0 0
    23 Locked QAM256 22 909000000 Hz 3.2 dBmV 44.5 dB 32420510 0 0
    24 Locked QAM256 23 915000000 Hz 3.2 dBmV 44.5 dB 32424064 0 0
    25 Locked QAM256 24 921000000 Hz 3.6 dBmV 44.5 dB 32427258 0 0
    26 Locked QAM256 25 927000000 Hz 3.4 dBmV 44.3 dB 32430492 0 0
    27 Locked QAM256 26 933000000 Hz 3.7 dBmV 44.6 dB 32434757 0 0
    28 Locked QAM256 27 939000000 Hz 3.2 dBmV 43.8 dB 32438348 0 0
    29 Locked QAM256 28 945000000 Hz 3.2 dBmV 44.4 dB 32441847 0 0
    30 Locked QAM256 30 957000000 Hz 3.0 dBmV 44.4 dB 32445703 0 0
    31 Locked QAM256 31 963000000 Hz 2.6 dBmV 44.1 dB 32446533 0 0
    32 Locked QAM256 32 969000000 Hz 2.2 dBmV 44.1 dB 32449187 0 0
    <tabindex=-1>Upstream Bonded Channels (Partial Service)
    Channel Lock Status Modulation Channel ID Frequency Power
    1 Locked ATDMA 1 36300000 Hz 58.8 dBmV
    2 Locked ATDMA 2 29900000 Hz 58.8 dBmV
    3 Locked ATDMA 3 23500000 Hz 58.8 dBmV
    4 Locked ATDMA 4 16900000 Hz 58.8 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
    <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, 1 159 300000000 Hz -4.6 dBmV 38.3 dB 1108 ~ 2987 27269730 551177 10
    2 Not Locked 0 0 0 Hz -9.4 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
    • JonathanJ's avatar
      JonathanJ
      Former Moderator
      @NeroNoctis

      You can follow WiderMouthOpen suggestion. If you haven't already scheduled another tech visit. Please send us an email and a URL to this thread, also include your full name and address. Send your information to cox.help@cox.com.


      Jonathan J
      Cox Moderator