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mvr_london's avatar
mvr_london
Tuning in
5 months ago

Intermittent connection

I've been having a problem with an intermittent connection for over a week now.

I checked the status on the VM Status page a week ago and an engineer was booked.

He came by 2 days ago, and did nothing as everything was working fine, speeds/latency were normal, but just for a few hours in the afternoon while he was here.  He did say someting about others in the area having a problem, but that he had fixed it at the box in the street.

Anyway, it's not working correctly - very slow much of the time and repeated disconnections.

The modem is a hub 4 in modem mode, connected to a Unifi router, so I can clearly see the disconnects from the Unifi system.

Occasionally, a forced reboot of the modem, seems to make everything work fine for a couple of hours.

VM website status page says

"Intermittent signal in your area" - We’re looking into it. Check back here after 22 hours, and if there’s still an issue we’ll help you book an engineer.

It's been saying that for a week - always says come back in a few hours.

Below are the number from before a reboot of the modem.  I'll post the numbers from after a reboot in a following post

5 Replies

  • From before a reboot:

    3.0 Downstream channels

    Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
    4162750000-17.131.9QAM2564
    1138750000-18.530.8QAM2561
    5170750000-17.531.9QAM2565
    8194750000-18.431.7QAM2568
    9202750000-18.431.7QAM2569
    11218750000-19.129.1QAM25611
    12226750000-20.328.8QAM25612
    13234750000-2228.6QAM25613
    0 00UNKNOWN0
    16258750000-2129.1QAM25616
    17266750000-20.629.6QAM25617
    18274750000-21.428.9QAM25618
    19282750000-20.229.4QAM25619
    20290750000-18.930QAM25620
    21298750000-18.729.8QAM25621
    22306750000-19.629.4QAM25622
    23314750000-19.829.6QAM25623
    24322750000-20.329.3QAM25624
    25330750000-20.629.1QAM25625
    27346750000-20.328.9QAM25627
    28354750000-20.628.8QAM25628
    29362750000-20.628.8QAM25629
    30370750000-20.329.1QAM25630
    31378750000-20.428.9QAM25631
    33394750000-20.429.1QAM25633
    34402750000-19.929.6QAM25634
    35410750000-19.630QAM25635
    36418750000-19.730.2QAM25636
    37522750000-21.129.2QAM25637
    38530750000-21.329.1QAM25638
    39538750000-20.829.4QAM25639
    40546750000-20.429.6QAM25640


    3.0 Downstream channels

    Channel Lock Status RxMER (dB) Pre RS Errors Post RS Errors
    4Locked31.91530800
    1Locked30.82386400
    5Locked31.91530800
    8Locked31.68866900
    9Locked31.68866900
    11Locked29.06295200
    12Locked28.75260900
    13Locked28.60537700
    0NotLocked 00
    16Locked29.10335200
    17Locked29.57447600
    18Locked28.90500800
    19Locked29.39718800
    20Locked30.00199700
    21Locked29.80677400
    22Locked29.44083600
    23Locked29.57447600
    24Locked29.26881600
    25Locked29.06295200
    27Locked28.94395800
    28Locked28.79021100
    29Locked28.79021100
    30Locked29.06295200
    31Locked28.90500800
    33Locked29.10335200
    34Locked29.61995300
    35Locked30.00199700
    36Locked30.15439600
    37Locked29.22685600
    38Locked29.06295200
    39Locked29.44083600
    40Locked29.57447600


    3.1 Downstream channels

    Channel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)
    159944K1800QAM1024424


    3.1 Downstream channels

    Channel ID Lock Status RxMER Data (dB) PLC Power (dBmV) Correcteds (Active Profile) Uncorrectables (Active Profile)
    159Locked31-20.3383959210

     

  • 3.0 Downstream channels

    Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID

    4162750000-17.09999831.993563QAM2564
    2146750000-17.20000131.993563QAM2562
    3154750000-17.59999831.543890QAM2563
    5170750000-17.50000031.993563QAM2565
    6178750000-17.90000231.615677QAM2566
    7186750000-18.40000231.335388QAM2567
    8194750000-18.29999931.615677QAM2568
    9202750000-18.40000231.615677QAM2569
    12226750000-20.20000128.752609QAM25612
    13234750000-22.00000028.752609QAM25613
    16258750000-21.00000029.103352QAM25616
    17266750000-20.50000029.619953QAM25617
    18274750000-21.29999928.943958QAM25618
    19282750000-20.20000129.397188QAM25619
    20290750000-18.90000230.001997QAM25620
    21298750000-18.70000129.759310QAM25621
    22306750000-19.59999829.440836QAM25622
    23314750000-19.70000129.574476QAM25623
    24322750000-20.20000129.268816QAM25624
    26338750000-20.70000128.943958QAM25626
    27346750000-20.29999928.943958QAM25627
    29362750000-20.59999828.905008QAM25629
    30370750000-20.20000129.103352QAM25630
    31378750000-20.40000228.943958QAM25631
    32386750000-20.70000128.905008QAM25632
    33394750000-20.29999929.226856QAM25633
    34402750000-19.79999929.619953QAM25634
    35410750000-19.50000030.001997QAM25635
    36418750000-19.70000130.154396QAM25636
    37522750000-21.09999829.268816QAM25637
    38530750000-21.29999929.062952QAM25638
    39538750000-20.70000129.440836QAM25639



    3.0 Downstream channels

    Channel Lock Status RxMER (dB) Pre RS Errors Post RS Errors

    4Locked31.99356300
    2Locked31.99356300
    3Locked31.54389000
    5Locked31.99356300
    6Locked31.61567700
    7Locked31.33538800
    8Locked31.61567700
    9Locked31.61567700
    12Locked28.75260900
    13Locked28.75260900
    16Locked29.10335200
    17Locked29.61995300
    18Locked28.94395800
    19Locked29.39718800
    20Locked30.00199700
    21Locked29.75931000
    22Locked29.44083600
    23Locked29.57447600
    24Locked29.26881600
    26Locked28.94395800
    27Locked28.94395800
    29Locked28.90500800
    30Locked29.10335200
    31Locked28.94395800
    32Locked28.90500800
    33Locked29.22685600
    34Locked29.61995300
    35Locked30.00199700
    36Locked30.15439600
    37Locked29.26881600
    38Locked29.06295200
    39Locked29.44083600



    3.1 Downstream channels

    Channel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)
    159944K1800QAM1024424


    3.1 Downstream channels

    Channel ID Lock Status RxMER Data (dB) PLC Power (dBmV) Correcteds (Active Profile) Uncorrectables (Active Profile)
    159Locked31-20.365462530
  • And 15 minutes after a reboot, the modem has disconnected from the VM network

  • And calling VM does nothing other than completely frustate me.

    I call, the automated system says we'll run some tests, then it says no fault found and sends me an SMS with a link to check the connections at home and immediately hangs up on me.  The link leads to a 404 page on their website.

    I call back, exactly the same thing happens again.