CM1200 issues with cox connection

Spencerbullett · ‎2024-02-01

Recently I’ve been having issues with cox internet, and was told it was my equipment. I went and got a new modem and router, which surprise surprise didn’t fix the issues at hand. I’m getting packet loss on hardwired and wifi using devices. Mostly only noticeable during gaming, I have the 1GBPS plan and receive about 950mbps download speed and around 35mbps upload. I’ll attach the error codes in a bit, as I’m out and about right now but there’s multiple warning and criticals in the modems event log. Cox has come out twice now, and have said lines are good and connection is good, but something is definitely awry with the service.

Spencerbullett · ‎2024-02-01

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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

Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 843000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Security Enabled BPI+
IP Provisioning Mode Honor MDD honorMdd(4)

Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 21 843000000 Hz 7.2 dBmV 41.8 dB 0 0
2 Locked QAM256 1 723000000 Hz 6.5 dBmV 41.8 dB 0 0
3 Locked QAM256 2 729000000 Hz 6.4 dBmV 41.8 dB 0 0
4 Locked QAM256 3 735000000 Hz 6.3 dBmV 41.8 dB 0 0
5 Locked QAM256 4 741000000 Hz 6.2 dBmV 41.8 dB 0 0
6 Locked QAM256 5 747000000 Hz 6.2 dBmV 41.8 dB 0 0
7 Locked QAM256 6 753000000 Hz 6.2 dBmV 41.7 dB 0 0
8 Locked QAM256 7 759000000 Hz 6.1 dBmV 41.8 dB 0 0
9 Locked QAM256 8 765000000 Hz 6.1 dBmV 41.8 dB 0 0
10 Locked QAM256 9 771000000 Hz 6.2 dBmV 41.8 dB 0 0
11 Locked QAM256 10 777000000 Hz 6.3 dBmV 41.9 dB 0 0
12 Locked QAM256 11 783000000 Hz 6.5 dBmV 41.9 dB 0 0
13 Locked QAM256 12 789000000 Hz 6.7 dBmV 42 dB 0 0
14 Locked QAM256 13 795000000 Hz 6.8 dBmV 42 dB 0 0
15 Locked QAM256 14 801000000 Hz 7.2 dBmV 42.2 dB 0 0
16 Locked QAM256 15 807000000 Hz 7.2 dBmV 42.1 dB 0 0
17 Locked QAM256 16 813000000 Hz 7.3 dBmV 42.1 dB 0 0
18 Locked QAM256 17 819000000 Hz 7.4 dBmV 42.1 dB 0 0
19 Locked QAM256 18 825000000 Hz 7.5 dBmV 42.1 dB 0 0
20 Locked QAM256 19 831000000 Hz 7.6 dBmV 42.2 dB 0 0
21 Locked QAM256 20 837000000 Hz 7.4 dBmV 42 dB 0 0
22 Locked QAM256 22 849000000 Hz 7.2 dBmV 41.8 dB 0 0
23 Locked QAM256 23 855000000 Hz 7.3 dBmV 41.8 dB 0 0
24 Locked QAM256 24 861000000 Hz 7 dBmV 41.8 dB 0 0
25 Locked QAM256 41 405000000 Hz 4.6 dBmV 41.4 dB 0 0
26 Locked QAM256 42 411000000 Hz 4.7 dBmV 41.4 dB 0 0
27 Locked QAM256 43 417000000 Hz 4.7 dBmV 41.4 dB 0 0
28 Locked QAM256 44 423000000 Hz 4.7 dBmV 41.4 dB 0 0
29 Locked QAM256 45 429000000 Hz 4.9 dBmV 41.4 dB 0 0
30 Locked QAM256 46 435000000 Hz 4.9 dBmV 41.4 dB 0 0
31 Locked QAM256 47 441000000 Hz 4.9 dBmV 41.4 dB 0 0
32 Locked QAM256 48 447000000 Hz 5 dBmV 41.4 dB 0 0

Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 1 5120 Ksym/sec 17400000 Hz 35.3 dBmV
2 Locked ATDMA 2 5120 Ksym/sec 23900000 Hz 36 dBmV
3 Locked ATDMA 3 5120 Ksym/sec 30300000 Hz 36.5 dBmV
4 Locked ATDMA 4 5120 Ksym/sec 36700000 Hz 35.5 dBmV
5 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
6 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
7 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
8 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV

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 8.1 dBmV 43.8 dB 2216 ~ 5975 2758489474 293329757 0
2 Not Locked 0 0 0 Hz 0 dBmV 0.0 dB 0 ~ 4095 0 0 0

Upstream OFDMA Channels
Channel Lock Status Modulation / Profile ID Channel ID Frequency Power
1 Not Locked 0 0 0 Hz 0 dBmV
2 Not Locked 0 0 0 Hz 0 dBmV

Spencerbullett · ‎2024-02-01

Time Priority Description
Thu Feb 01 11:55:49 2024 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=6c:cd:d6:6b:38:7c;CMTS-MAC=00:d6:fe:e6:cf:1e;CM-QOS=1.1;CM-VER=3.1;
Wed Jan 31 19:37:54 2024 Warning (5) Dynamic Range Window violation
Wed Jan 31 19:37:54 2024 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=6c:cd:d6:6b:38:7c;CMTS-MAC=00:d6:fe:e6:cf:1e;CM-QOS=1.1;CM-VER=3.1;
Wed Jan 31 19:36:58 2024 Notice (6) CM-STATUS message sent. Event Type Code: 22; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=6c:cd:d6:6b:38:7c;CMTS-MAC=00:d6:fe:e6:cf:1e;CM-QOS=1.1;CM-VER=3.1;
Wed Jan 31 19:36:39 2024 Notice (6) CM-STATUS message sent. Event Type Code: 20; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=6c:cd:d6:6b:38:7c;CMTS-MAC=00:d6:fe:e6:cf:1e;CM-QOS=1.1;CM-VER=3.1;
Wed Jan 31 19:36:27 2024 Warning (5) REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=6c:cd:d6:6b:38:7c;CMTS-MAC=00:d6:fe:e6:cf:1e;CM-QOS=1.1;CM-VER=3.1;
Wed Jan 31 19:36:23 2024 Notice (6) DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=6c:cd:d6:6b:38:7c;CMTS-MAC=00:d6:fe:e6:cf:1e;CM-QOS=1.1;CM-VER=3.1;
Wed Jan 31 19:36:18 2024 Notice (6) TLV-11 - unrecognized OID;CM-MAC=6c:cd:d6:6b:38:7c;CMTS-MAC=00:d6:fe:e6:cf:1e;CM-QOS=1.1;CM-VER=3.1;
Wed Jan 31 19:36:17 2024 Warning (5) DHCP WARNING - Non-critical field invalid in response ;CM-MAC=6c:cd:d6:6b:38:7c;CMTS-MAC=00:d6:fe:e6:cf:1e;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=6c:cd:d6:6b:38:7c;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=6c:cd:d6:6b:38:7c;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=6c:cd:d6:6b:38:7c;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=6c:cd:d6:6b:38:7c;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;

FURRYe38 · ‎2024-02-01

Please post a copy and paste of the modems connection status and event log page.
https://kb.netgear.com/30007/How-do-I-obtain-the-cable-connection-information-from-a-NETGEAR-cable-m...
https://kb.netgear.com/30008/How-do-I-view-or-clear-the-event-logs-on-my-NETGEAR-cable-modem-or-mode...
Any Criticals, Errors or Warnings seen in the event logs needs to be reviewed and resolved by the ISP. Indicates a signal issue on the ISP line up to the modem.

Be sure your using a good quality LAN cable between the modem and router. CAT6 is recommended.
What is the brand and model of the host wifi router connected to the modem?

Spencerbullett · ‎2024-02-01

The wifi router is a Netgear nighthawk AX6-AX5400 I added the event log as well as the other spam of numbers

Spencerbullett · ‎2024-02-01

Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 843000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Security Enabled BPI+
IP Provisioning Mode Honor MDD honorMdd(4)

Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 21 843000000 Hz 7.2 dBmV 41.8 dB 0 0
2 Locked QAM256 1 723000000 Hz 6.5 dBmV 41.8 dB 0 0
3 Locked QAM256 2 729000000 Hz 6.4 dBmV 41.8 dB 0 0
4 Locked QAM256 3 735000000 Hz 6.3 dBmV 41.8 dB 0 0
5 Locked QAM256 4 741000000 Hz 6.2 dBmV 41.8 dB 0 0
6 Locked QAM256 5 747000000 Hz 6.2 dBmV 41.8 dB 0 0
7 Locked QAM256 6 753000000 Hz 6.2 dBmV 41.7 dB 0 0
8 Locked QAM256 7 759000000 Hz 6.1 dBmV 41.8 dB 0 0
9 Locked QAM256 8 765000000 Hz 6.1 dBmV 41.8 dB 0 0
10 Locked QAM256 9 771000000 Hz 6.2 dBmV 41.8 dB 0 0
11 Locked QAM256 10 777000000 Hz 6.3 dBmV 41.9 dB 0 0
12 Locked QAM256 11 783000000 Hz 6.5 dBmV 41.9 dB 0 0
13 Locked QAM256 12 789000000 Hz 6.7 dBmV 42 dB 0 0
14 Locked QAM256 13 795000000 Hz 6.8 dBmV 42 dB 0 0
15 Locked QAM256 14 801000000 Hz 7.2 dBmV 42.2 dB 0 0
16 Locked QAM256 15 807000000 Hz 7.2 dBmV 42.1 dB 0 0
17 Locked QAM256 16 813000000 Hz 7.3 dBmV 42.1 dB 0 0
18 Locked QAM256 17 819000000 Hz 7.4 dBmV 42.1 dB 0 0
19 Locked QAM256 18 825000000 Hz 7.5 dBmV 42.1 dB 0 0
20 Locked QAM256 19 831000000 Hz 7.6 dBmV 42.2 dB 0 0
21 Locked QAM256 20 837000000 Hz 7.4 dBmV 42 dB 0 0
22 Locked QAM256 22 849000000 Hz 7.2 dBmV 41.8 dB 0 0
23 Locked QAM256 23 855000000 Hz 7.3 dBmV 41.8 dB 0 0
24 Locked QAM256 24 861000000 Hz 7 dBmV 41.8 dB 0 0
25 Locked QAM256 41 405000000 Hz 4.6 dBmV 41.4 dB 0 0
26 Locked QAM256 42 411000000 Hz 4.7 dBmV 41.4 dB 0 0
27 Locked QAM256 43 417000000 Hz 4.7 dBmV 41.4 dB 0 0
28 Locked QAM256 44 423000000 Hz 4.7 dBmV 41.4 dB 0 0
29 Locked QAM256 45 429000000 Hz 4.9 dBmV 41.4 dB 0 0
30 Locked QAM256 46 435000000 Hz 4.9 dBmV 41.4 dB 0 0
31 Locked QAM256 47 441000000 Hz 4.9 dBmV 41.4 dB 0 0
32 Locked QAM256 48 447000000 Hz 5 dBmV 41.4 dB 0 0

Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 1 5120 Ksym/sec 17400000 Hz 35.3 dBmV
2 Locked ATDMA 2 5120 Ksym/sec 23900000 Hz 36 dBmV
3 Locked ATDMA 3 5120 Ksym/sec 30300000 Hz 36.5 dBmV
4 Locked ATDMA 4 5120 Ksym/sec 36700000 Hz 35.5 dBmV
5 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
6 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
7 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
8 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV

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 8.1 dBmV 43.8 dB 2216 ~ 5975 2758489474 293329757 0
2 Not Locked 0 0 0 Hz 0 dBmV 0.0 dB 0 ~ 4095 0 0 0

Upstream OFDMA Channels
Channel Lock Status Modulation / Profile ID Channel ID Frequency Power
1 Not Locked 0 0 0 Hz 0 dBmV
2 Not Locked 0 0 0 Hz 0 dBmV

FURRYe38 · ‎2024-02-01

That a R8000?

Spencerbullett · ‎2024-02-01

Negative. I updated the information a minute after the responds, it’s the nighthawk AX6-AX5400

FURRYe38 · ‎2024-02-01

RAX##?

Spencerbullett · ‎2024-02-01

RAX50v2

FURRYe38 · ‎2024-02-01

Ok, RAX50v2 is the actual model number of the router you have. AX5400 is a combined wifi marketing speed.

plemans · ‎2024-02-02

Your line connection doesn't look to bad but your logs are indicating issues with it.

If you've had this with 2x different modems, then the ISP can't blame it on the modem anymore. They'll need to check the line.

CM1200 issues with cox connection

CM1200 issues with cox connection

Re: CM1200 issues with cox connection

Re: CM1200 issues with cox connection

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Re: CM1200 issues with cox connection

Re: CM1200 issues with cox connection

Re: CM1200 issues with cox connection

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Re: CM1200 issues with cox connection

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