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Punster's avatar
Punster
Aspirant
Sep 11, 2025

CM3000 Cable Modem Upload Stream Issues

I have had Cox communications to my house several times in the past month and a half.  They've replaced all the cable connections both in and out of my house.  I have 2 gig download 100+MBPS upload. ...
cm3000
Punster's avatar
Punster
Aspirant
Sep 12, 2025

Firmware version is 6.01.03  

Connections Status

 

Cable Diagnostic

Status: Good

Action:
Your setup looks fine. If you can't access the internet, make sure you properly activated the modem. If modem has been activated and you still can't access the internet, contact your service provider for troubleshooting help.
If you can access the internet but has other internet issue, the Netgear Cable Knowledge Base can provide additional troubleshooting info.

CM Status: Good

Downstream Status: Good

    Downstream Power Level: Good

    Downstream SNR Level: Good

Upstream Status: Good

    Upstream Power Level: Good


Current Time: Fri Sep 12 06:22:17 2025

Startup Procedure
Acquire Downstream Channel: 759000000 Hz  Locked
Connectivity State:          OK       Operational
Boot State:                  OK       Operational
Security:                   Enabled   BPI+
IP Provisioning Mode:       Honor MDD   IPv4 only


Downstream Bonded Channels
Channel LockedStatus Modulation ChannelID  Frequency     Power    SNR   Correctables Uncorrectables     
      1     Locked     QAM256      5     759000000 Hz     -0.5     42.7     0     0
      2     Locked     QAM256      1     735000000 Hz     -0.3     43.1     0     0
      3     Locked     QAM256      2     741000000 Hz     -0.5     42.9     0     0
      4     Locked     QAM256      3     747000000 Hz     -0.4     42.9     0     0
      5     Locked     QAM256      4     753000000 Hz     -0.5     42.8     0     0
      6     Locked     QAM256      6     765000000 Hz     -0.8     42.7     0     0
      7     Locked     QAM256      7     771000000 Hz     -0.9     42.6     0     0
      8     Locked     QAM256      8     777000000 Hz     -0.9     42.6     0     0
      9     Locked     QAM256      9     783000000 Hz     -1     42.5     0     0
     10     Locked     QAM256     10     789000000 Hz     -1.1     42.4     0     0
     11     Locked     QAM256     11     795000000 Hz     -1.3     42.3     0     0
     12     Locked     QAM256     12     801000000 Hz     -1.1     42.1     0     0
     13     Locked     QAM256     13     807000000 Hz     -1.3     42.1     0     0
     14     Locked     QAM256     14     813000000 Hz     -1.3     42     0     0
     15     Locked     QAM256     15     819000000 Hz     -1.2     42     0     0
     16     Locked     QAM256     16     825000000 Hz     -1.2     42.1     0     0
     17     Locked     QAM256     17     831000000 Hz     -1.1     42.1     0     0
     18     Locked     QAM256     18     837000000 Hz     -1.1     42.1     0     0
     19     Locked     QAM256     19     843000000 Hz     -1.1     42.1     0     0
     20     Locked     QAM256     20     849000000 Hz     -0.9     42.2     0     0
     21     Locked     QAM256     21     855000000 Hz     -1.2     42.1     0     0
     22     Locked     QAM256     22     861000000 Hz     -1.2     42.1     0     0
     23     Locked     QAM256     23     867000000 Hz     -1.5     42     0     0
     24     Locked     QAM256     24     873000000 Hz     -1.3     41.9     0     0
     25     Locked     QAM256     41     213000000 Hz     0.6     44     2     0
     26     Locked     QAM256     42     219000000 Hz     0.5     44     3     0
     27     Locked     QAM256     43     225000000 Hz     0.3     44     1     0
     28     Locked     QAM256     44     231000000 Hz     0.2     43.8     1     0
     29     Locked     QAM256     45     237000000 Hz     0.2     39.2     1     0
     30     Locked     QAM256     46     243000000 Hz     0.2     38.2     470710     165
     31     Locked     QAM256     47     249000000 Hz     0.2     38     38     0
     32     Locked     QAM256     48     255000000 Hz     0.1     43.6     4     0

Upstream Bonded Channels
Channel   LockedStatus  ChannelType ChannelID   SymbolRate        Frequency       Power     
      1       Locked       ATDMA      1       5120 Ksym/sec       16900000 Hz       42.8 dBmV
      2       Locked       ATDMA      2       5120 Ksym/sec       23500000 Hz       42.8 dBmV
      3       Locked       ATDMA      3       5120 Ksym/sec       29900000 Hz       42.8 dBmV
      4       Locked       ATDMA      4       5120 Ksym/sec       36300000 Hz       43.3 dBmV
      5       Not Locked       Unknown      0       0       0       0.0
      6       Not Locked       Unknown      0       0       0       0.0
      7       Not Locked       Unknown      0       0       0       0.0
      8       Not Locked       Unknown      0       0       0       0.0

Downstream OFDM Channels
Channel   LockedStatus  ProfileID  ChannelID    Frequency       Power       SNR/MER    ActiveSubcarrier    Unerror    Correctable   Uncorrectable
      1     Locked     0 ,1 ,2 ,3     159     300000000 Hz     -0.22 dBmV     43.4 dB     296 ~ 7895     444807898     233749043     0
      2     Locked     0 ,1 ,2 ,3     160     918000000 Hz     -0.12 dBmV     42.0 dB     2216 ~ 5975     591000640     142733067     1

Upstream OFDMA Channels
Channel   LockedStatus    ProfileID    ChannelID    Frequency       Power
      1     Locked     9 ,13      6     36800000 Hz     39.0 dBmV
      2     Not Locked     0      0     0 Hz     0 dBmV

Event Log
         Time               Priority     Description
Thu Sep 11 21:50:21 2025     Notice (6)     US profile assignment change. US Chan ID: 6; Previous Profile: 13; New Profile: 9 13.;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;CM-QOS=1.1;CM-VER=3.1;
Thu Sep 11 21:49:32 2025     Warning (5)     Dynamic Range Window violation
Thu Sep 11 21:49:32 2025     Warning (5)     RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;CM-QOS=1.1;CM-VER=3.1;
Thu Sep 11 21:49:26 2025     Notice (6)     DS profile assignment change. DS Chan ID: 33; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;CM-QOS=1.1;CM-VER=3.1;
Thu Sep 11 21:49:24 2025     Notice (6)     DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;CM-QOS=1.1;CM-VER=3.1;
Thu Sep 11 21:49:19 2025     Notice (6)     TLV-11 - unrecognized OID;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;CM-QOS=1.1;CM-VER=3.1;
Time Not Established     Warning (5)     DHCP WARNING - Non-critical field invalid in response ;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;CM-QOS=1.1;CM-VER=3.1;
Time Not Established     Notice (6)     Honoring MDD; IP provisioning mode = IPv4
Time Not Established     Critical (3)     No Ranging Response received - T3 time-out;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;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=54:07:7d:c4:c0:98;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Thu Sep 11 19:28:09 2025     Critical (3)     No Ranging Response received - T3 time-out;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;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=54:07:7d:c4:c0:98;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not Established     Critical (3)     No Ranging Response received - T3 time-out;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;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=54:07:7d:c4:c0:98;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Thu Sep 11 15:24:41 2025     Critical (3)     Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;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=54:07:7d:c4:c0:98;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not Established     Critical (3)     DHCP FAILED - Discover sent, no offer received;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;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=54:07:7d:c4:c0:98;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not Established     Critical (3)     No Ranging Response received - T3 time-out;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;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=54:07:7d:c4:c0:98;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Thu Sep 11 12:26:20 2025     Critical (3)     No Ranging Response received - T3 time-out;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;CM-QOS=1.1;CM-VER=3.1;
Thu Sep 11 12:26:16 2025     Critical (3)     No Ranging Response received - T3 time-out;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;CM-QOS=1.1;CM-VER=3.1;
Time Not Established     Critical (3)     No Ranging Response received - T3 time-out;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;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=54:07:7d:c4:c0:98;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=54:07:7d:c4:c0:98;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
 

 

Event Log

 
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TimePriorityDescription
Thu Sep 11 21:50:21 2025(Notice (6))US profile assignment change. US Chan ID: 6; Previous Profile: 13; New Profile: 9 13.;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;CM-QOS=1.1;CM-VER=3.1;
Thu Sep 11 21:49:32 2025(Warning (5))Dynamic Range Window violation
Thu Sep 11 21:49:32 2025(Warning (5))RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;CM-QOS=1.1;CM-VER=3.1;
Thu Sep 11 21:49:26 2025(Notice (6))DS profile assignment change. DS Chan ID: 33; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;CM-QOS=1.1;CM-VER=3.1;
Thu Sep 11 21:49:24 2025(Notice (6))DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;CM-QOS=1.1;CM-VER=3.1;
Thu Sep 11 21:49:19 2025(Notice (6))TLV-11 - unrecognized OID;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;CM-QOS=1.1;CM-VER=3.1;
Time Not Established(Warning (5))DHCP WARNING - Non-critical field invalid in response ;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;CM-QOS=1.1;CM-VER=3.1;
Time Not Established(Notice (6))Honoring MDD; IP provisioning mode = IPv4
Time Not Established(Critical (3))No Ranging Response received - T3 time-out;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;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=54:07:7d:c4:c0:98;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Thu Sep 11 19:28:09 2025(Critical (3))No Ranging Response received - T3 time-out;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;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=54:07:7d:c4:c0:98;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not Established(Critical (3))No Ranging Response received - T3 time-out;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;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=54:07:7d:c4:c0:98;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Thu Sep 11 15:24:41 2025(Critical (3))Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;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=54:07:7d:c4:c0:98;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not Established(Critical (3))DHCP FAILED - Discover sent, no offer received;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;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=54:07:7d:c4:c0:98;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not Established(Critical (3))No Ranging Response received - T3 time-out;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;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=54:07:7d:c4:c0:98;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Thu Sep 11 12:26:20 2025(Critical (3))No Ranging Response received - T3 time-out;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;CM-QOS=1.1;CM-VER=3.1;
Thu Sep 11 12:26:16 2025(Critical (3))No Ranging Response received - T3 time-out;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;CM-QOS=1.1;CM-VER=3.1;
Time Not Established(Critical (3))No Ranging Response received - T3 time-out;CM-MAC=54:07:7d:c4:c0:98;CMTS-MAC=6c:13:d5:21:a5:d6;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=54:07:7d:c4:c0:98;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=54:07:7d:c4:c0:98;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
 

 

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