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iain123456's avatar
iain123456
Joining in
2 years ago

Constant disconnections

We recently had an engineer visit where the engineer concluded everything was fine, but the Hub 4 we had was replaced with a Hub 5. The reason for the visit was due to constant disconnections and loss of service.

Since the Hub 5 was installed it has been much better until the last couple of days where we're losing our connection a lot again. The only way to sort it is turn the hub off, leave for a bit then restart. It then works for a while. I've discovered there is a log in the Hub 5 which provides the table below, the critical items coincide with when the internet is lost, I'm assuming this is the reason and is therefore related.

I've found lots of questions about this, but no real answers, how does this get fixed? The current recorded message says there are no issues in our area, but when I check the service on line, it says there is an issue which is being worked on, check again tomorrow.

imePriorityDescription
14/12/2023 17:09warningDBC-REQ Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14/12/2023 17:09criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14/12/2023 16:58noticeREGISTRATION COMPLETE - Waiting for Operational status
14/12/2023 16:57warningRNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14/12/2023 16:57warningREG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14/12/2023 16:57warningDynamic Range Window violation
14/12/2023 16:57noticeDS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14/12/2023 16:57noticeTLV-11 - unrecognized OID;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14/12/2023 16:57warningDHCP WARNING - Non-critical field invalid in response ;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14/12/2023 16:57noticeHonoring MDD; IP provisioning mode = IPv4
14/12/2023 16:57criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14/12/2023 16:57criticalCable Modem Reboot because of - HW or Power-On Reset
14/12/2023 14:38criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14/12/2023 14:38criticalCable Modem Reboot because of - HW or Power-On Reset
14/12/2023 14:02criticalReceived Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14/12/2023 09:51criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14/12/2023 09:40criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14/12/2023 09:39criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14/12/2023 09:39criticalCable Modem Reboot because of - HW or Power-On Reset
13/12/2023 23:16criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
13/12/2023 23:16criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
13/12/2023 23:16criticalCable Modem Reboot because of - HW or Power-On Reset
13/12/2023 07:22criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
13/12/2023 07:22criticalCable Modem Reboot because of - HW or Power-On Reset
12/12/2023 07:29criticalStarted Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
12/12/2023 07:28criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
12/12/2023 07:28criticalCable Modem Reboot because of - HW or Power-On Reset
12/12/2023 07:26criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
12/12/2023 06:09criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
12/12/2023 05:58criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
12/12/2023 05:57criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
12/12/2023 05:57criticalCable Modem Reboot because of - HW or Power-On Reset

 

  • Roger_Gooner's avatar
    Roger_Gooner
    Alessandro Volta

    Did he say anything about the upstream power levels? They might be a bit low.

  • Hi, Engineer came yesterday and installed an attenuator which seemed to increase the upstream and reduce the downstream. However, this evening, we've lost connection again...

    Time Priority Description

    07-01-2024 18:18:29noticeREGISTRATION COMPLETE - Waiting for Operational status
    07-01-2024 18:18:29criticalNo Maintenance Broadcasts for Ranging opportunities received - T2 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    07-01-2024 18:18:29warningTCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    07-01-2024 18:18:20warningRNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    07-01-2024 18:18:20warningDynamic Range Window violation
    07-01-2024 18:18:20warningRNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    07-01-2024 18:18:20warningDynamic Range Window violation
    07-01-2024 18:18:19warningDynamic Range Window violation
    07-01-2024 18:18:19warningREG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    07-01-2024 18:18:19warningRNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    07-01-2024 18:18:14noticeDS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    07-01-2024 18:18:11noticeTLV-11 - unrecognized OID;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    07-01-2024 18:18:08warningDHCP WARNING - Non-critical field invalid in response ;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    07-01-2024 18:18:06noticeHonoring MDD; IP provisioning mode = IPv4
    07-01-2024 18:17:56criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    07-01-2024 18:17:55criticalCable Modem Reboot because of - HW or Power-On Reset
    07-01-2024 17:59:50criticalCable Modem Reboot because of - HW or Power-On Reset
    07-01-2024 17:59:50criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    07-01-2024 09:22:49criticalCable Modem Reboot because of - HW or Power-On Reset
    07-01-2024 09:22:49criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    06-01-2024 12:04:42criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    06-01-2024 12:03:50criticalNo Maintenance Broadcasts for Ranging opportunities received - T2 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
  • 3.0 Upstream channels

    Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID
    06030000037.85120QAM 641
    15370000038.35120QAM 642
    24620000038.35120QAM 643
    33940000037.55120QAM 644
    43260000037.85120QAM 645
    52360000037.85120QAM 646

    3.0 Upstream channels

    Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts
    0ATDMA0100
    1ATDMA0100
    2ATDMA0100
    3ATDMA0100
    4ATDMA0100
    5ATDMA0100
  • .0 Downstream channels

    Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
    1154000000-1.238QAM 2563
    21380000000.838QAM 2561
    31460000000.938QAM 2562
    4162000000-1.438QAM 2564
    5170000000-1.438QAM 2565
    6178000000-1.338QAM 2566
    7186000000-1.138QAM 2567
    81940000000.838QAM 2568
    9202000000-138QAM 2569
    10210000000-1.138QAM 25610
    11218000000-1.238QAM 25611
    12226000000-1.338QAM 25612
    13234000000-1.238QAM 25613
    14242000000-1.238QAM 25614
    15250000000-1.338QAM 25615
    16258000000-1.438QAM 25616
    17266000000-1.338QAM 25617
    18274000000-1.537QAM 25618
    19282000000-1.437QAM 25619
    20290000000-1.338QAM 25620
    21298000000-1.438QAM 25621
    22306000000-1.538QAM 25622
    23314000000-1.637QAM 25623
    24322000000-1.837QAM 25624
    25330000000-1.937QAM 25625
    26338000000-1.937QAM 25626
    27346000000-237QAM 25627
    28354000000-2.137QAM 25628
    29362000000-1.937QAM 25629
    30370000000-1.837QAM 25630
    31378000000-1.837QAM 25631

    3.0 Downstream channels

    Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors
    1Locked3800
    2Locked3800
    3Locked3800
    4Locked3800
    5Locked3800
    6Locked3800
    7Locked3800
    8Locked3800
    9Locked3800
    10Locked3800
    11Locked3800
    12Locked3800
    13Locked3800
    14Locked3800
    15Locked3800
    16Locked3800
    17Locked3800
    18Locked3700
    19Locked3700
    20Locked3800
    21Locked3800
    22Locked3800
    23Locked3700
    24Locked3700
    25Locked3700
    26Locked3700
    27Locked3710
    28Locked3700
    29Locked3700
    30Locked3700
    31Locked3700

    3.1 Downstream channels

    Channel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)
    159944K1840QAM 40961108

    3.1 Downstream channels

    Channel ID Locked Status RxMER Data (dB) PLC Power (dBmV) Corrected errors (Active Profile) Uncorrectable errors (Active Profile)
    159Locked38-0.9147775900
  • @john_gs I'm hoping you can assist, this is slowly driving me crazy!