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me3260's avatar
me3260
New Contributor
2 years ago

3.0 Modem throttling down to 30mbps. Worked Fine for 2 months after upgrade

Using an ARRIS / Surfboard SB6183.  Have Essential Internet with 150mbps download.  

2 days ago the internet started throttling to 30down/3up constantly.  Techs have come out to check all hardware and connections.  Their only solution to getting back to 150 download was to change the modem out to a 3.1 version.  However the list of approved modems from Cox is listing the SB6183 as good for "preferred" speeds which should be higher than essential.  Anybody else having this problem?  I don't really want a new modem when the company says this one should work fine.  It is also less than a year old.  

internet speed
modem
speed
Throttling

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  • WiderMouthOpen's avatar
    WiderMouthOpen
    Esteemed Contributor
    2 years ago

    Could be a signal problem. Maybe it is only bonding one channel down when you see the 30Mbps speed. Do you lose the blue downstream light on the front? Can you post the signal levels from 192.168.100.1? See here for more info.

    • me3260's avatar
      me3260
      New Contributor
      2 years ago
      Status

      The statuses listed show the connection state of the cable modem. They are used by your service provider to evaluate the operation of the cable modem.
      Startup Procedure
      Procedure Status Comment
      Acquire Downstream Channel   Locked
      Connectivity State OK Operational
      Boot State OK Operational
      Configuration File OK
      Security Enabled BPI+
      DOCSIS Network Access Enabled Allowed

      Downstream Bonded Channels
      Channel Lock Status Modulation Channel ID Frequency Power SNR Corrected Uncorrectables
      1 Locked QAM256 29 951000000 Hz 5.9 dBmV 31.8 dB 16 0
      2 Locked QAM256 17 879000000 Hz 8.1 dBmV 32.5 dB 0 0
      3 Locked QAM256 18 885000000 Hz 7.8 dBmV 32.4 dB 10 0
      4 Locked QAM256 19 891000000 Hz 7.5 dBmV 32.4 dB 0 0
      5 Locked QAM256 20 897000000 Hz 7.1 dBmV 32.3 dB 4 0
      6 Locked QAM256 21 903000000 Hz 6.7 dBmV 32.3 dB 14 0
      7 Locked QAM256 22 909000000 Hz 6.7 dBmV 32.2 dB 10 0
      8 Locked QAM256 23 915000000 Hz 6.7 dBmV 32.2 dB 22 0
      9 Locked QAM256 24 921000000 Hz 6.7 dBmV 32.1 dB 20 0
      10 Locked QAM256 25 927000000 Hz 6.8 dBmV 32.0 dB 26 0
      11 Locked QAM256 26 933000000 Hz 6.6 dBmV 32.0 dB 15 0
      12 Locked QAM256 27 939000000 Hz 6.5 dBmV 32.0 dB 28 0
      13 Locked QAM256 28 945000000 Hz 6.4 dBmV 31.9 dB 45 0
      14 Locked QAM256 30 957000000 Hz 6.0 dBmV 31.8 dB 42 0
      15 Locked QAM256 31 963000000 Hz 5.8 dBmV 31.8 dB 25 0
      16 Locked QAM256 32 969000000 Hz 6.1 dBmV 31.7 dB 62 0

      Upstream Bonded Channels
      Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
      1 Locked ATDMA 1 5120 Ksym/sec 36800000 Hz 32.7 dBmV
      2 Locked ATDMA 2 5120 Ksym/sec 30400000 Hz 34.2 dBmV
      3 Locked ATDMA 3 5120 Ksym/sec 24000000 Hz 32.7 dBmV
      4 Locked ATDMA 4 5120 Ksym/sec 17600000 Hz 32.7 dBmV


      Current System Time: Thu Dec 29 11:00:40 2022

  • Darkatt's avatar
    Darkatt
    Valued Contributor III
    2 years ago

    Try connecting your computer direct to the modem via ethernet and run the speedtest that way, see if there is a difference between the router connection, and direct to the modem. That should be the first step in troubleshooting.