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ApexNM's avatar
ApexNM
Aspirant
Aug 23, 2017

CM500 Intermittent Connection

I just installed a new CM500 cable modem and the connection has dropped intermittently averaging once an hour and the modem reboots. Here is the error log after the most recent one:

 

Troubleshooting

4 Replies

  • vkdelta's avatar
    vkdelta
    NETGEAR Employee Retired
    Aug 23, 2017

    you have too many Dynamic Range window violations. 

     

    Please post your power values. 

    • ApexNM's avatar
      ApexNM
      Aspirant
      Aug 23, 2017
      Startup Procedure
      ProcedureStatusComment
      Acquire Downstream Channel753000000 HzLocked
      Connectivity StateOKOperational
      Boot StateOKOperational
      SecurityEnabledBPI+
      IP Provisioning ModeIPv4 Onlyipv4Only(0)
       
      Downstream Bonded Channels
      ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectablesUncorrectables
      1LockedQAM25620753000000 Hz0.4 dBmV37.3 dB67146
      2LockedQAM2562597000000 Hz2.1 dBmV38.3 dB47217
      3LockedQAM2563603000000 Hz2.1 dBmV38.2 dB35157
      4LockedQAM2564609000000 Hz2.1 dBmV38.2 dB62174
      5LockedQAM2565615000000 Hz2.1 dBmV38.1 dB40223
      6LockedQAM2566621000000 Hz2.2 dBmV38 dB44160
      7LockedQAM2567627000000 Hz2 dBmV37.8 dB55184
      8LockedQAM2568633000000 Hz1.9 dBmV37.7 dB62174
      9LockedQAM25610645000000 Hz1.8 dBmV37.6 dB76206
      10LockedQAM25611651000000 Hz1.5 dBmV37.4 dB91163
      11LockedQAM25614669000000 Hz1.3 dBmV37.4 dB87202
      12LockedQAM25615675000000 Hz1.3 dBmV37 dB71173
      13LockedQAM25616681000000 Hz1.3 dBmV37.3 dB54186
      14LockedQAM25617687000000 Hz1 dBmV37.1 dB73171
      15LockedQAM25618693000000 Hz1.2 dBmV37.3 dB49162
      16LockedQAM25619747000000 Hz0.6 dBmV37.2 dB26121
       
      Upstream Bonded Channels
      ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
      1LockedATDMA25120 Ksym/sec24200000 Hz40.5 dBmV
      2LockedTDMA12560 Ksym/sec19400000 Hz40.5 dBmV
      3LockedATDMA35120 Ksym/sec30600000 Hz37.8 dBmV
      4LockedATDMA42560 Ksym/sec37000000 Hz44.5 dBmV
      • ApexNM's avatar
        ApexNM
        Aspirant
        Aug 23, 2017

        Note: The upstream channels have been going up and down in power, as well as locking/unlocking. This is like 10 minutes removed from the first data set: 

         

        Upstream Bonded Channels (Partial Service)
        ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
        1Not LockedUnknown20 Ksym/sec24200000 Hz0.0 dBmV
        2Not LockedUnknown10 Ksym/sec19400000 Hz0.0 dBmV
        3LockedATDMA35120 Ksym/sec30600000 Hz44.5 dBmV
        4LockedATDMA42560 Ksym/sec37000000 Hz43 dBmV