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Hizurri's avatar
Hizurri
Just joined
18 hours ago

Hub 5 connection dropping?

Hey. I'm using a Hub 5 on a Gig1 connection, and have a weird issue. My connection will drop without warning, yet the status light on my hub will remain solid white. My phone (attached to the hub) will have a dialing tone yet I cannot successfully dial out or receive calls. I am able to address the hub's web interface and its network status reads "connected" etc. Occasionally it will come back on its own after a matter of hours, but usually I have to reboot or power-cycle the hub to get it to reconnect, after which it will work fine for a few hours. Rinse and repeat.

Here's hoping someone can help shed some light on this most peculiar occurrence.

7 Replies

    • Hizurri's avatar
      Hizurri
      Just joined

      What is the preferred method for sharing info from the Hub's status pages? Sorry, I'm new to this.

      • newapollo's avatar
        newapollo
        Very Insightful Person

        Copy/paste the info, but blank out any MAC addresses shown in the network log.

  • Client62's avatar
    Client62
    Alessandro Volta

    Also check the power levels and errors situation on the Hub's Downstream and Upstream tabs.

    When the telephone is connected via the VM Hub TEL 1 socket, it is the Hub that produces the dial tone / ring & engaged tones.  So it is possible to have a dial tone and hear the phone tone dial as you press the digits, but then have the call fail.

  • Here are my ds/us channels:

    3.0 Downstream channels

    Channel    Frequency (Hz)    Power (dBmV)    SNR (dB)    Modulation    Channel ID
    1    203000000    1.1    41    QAM 256    9
    2    211000000    1.1    41    QAM 256    10
    3    219000000    1    40    QAM 256    11
    4    227000000    0.9    41    QAM 256    12
    5    235000000    0.6    41    QAM 256    13
    6    243000000    0.2    41    QAM 256    14
    7    251000000    0.1    41    QAM 256    15
    8    259000000    0.5    41    QAM 256    16
    9    267000000    0.2    41    QAM 256    17
    10    275000000    0.1    41    QAM 256    18
    11    283000000    0.3    41    QAM 256    19
    12    291000000    0.6    41    QAM 256    20
    13    299000000    0.7    41    QAM 256    21
    14    307000000    0.6    41    QAM 256    22
    15    315000000    0.6    41    QAM 256    23
    16    323000000    0.3    41    QAM 256    24
    17    331000000    0.2    41    QAM 256    25
    18    339000000    0    41    QAM 256    26
    19    347000000    0    41    QAM 256    27
    20    355000000    0    41    QAM 256    28
    21    363000000    0    41    QAM 256    29
    22    371000000    0.1    41    QAM 256    30
    23    379000000    0.1    41    QAM 256    31
    24    387000000    0.1    41    QAM 256    32
    25    395000000    0.1    41    QAM 256    33
    26    403000000    0.1    42    QAM 256    34
    27    411000000    0.2    41    QAM 256    35
    28    419000000    0.4    41    QAM 256    36
    29    427000000    0.7    41    QAM 256    37
    30    435000000    0.7    41    QAM 256    38
    31    443000000    0.7    41    QAM 256    39
    32    451000000    0.2    41    QAM 256    40
    3.0 Downstream channels

    Channel    Locked Status    RxMER (dB)    Pre RS Errors    Post RS Errors
    1    Locked    41    5    0
    2    Locked    41    1    0
    3    Locked    40    1    0
    4    Locked    41    0    0
    5    Locked    41    0    0
    6    Locked    41    4    0
    7    Locked    41    37    0
    8    Locked    41    0    0
    9    Locked    41    0    0
    10    Locked    41    0    0
    11    Locked    41    0    0
    12    Locked    41    0    0
    13    Locked    41    0    0
    14    Locked    41    0    0
    15    Locked    41    0    0
    16    Locked    41    0    0
    17    Locked    41    1    0
    18    Locked    41    5    0
    19    Locked    41    0    0
    20    Locked    41    1    0
    21    Locked    41    1    0
    22    Locked    41    0    0
    23    Locked    41    1    0
    24    Locked    41    1    0
    25    Locked    41    0    0
    26    Locked    42    0    0
    27    Locked    41    0    0
    28    Locked    41    0    0
    29    Locked    41    0    0
    30    Locked    41    43    0
    31    Locked    41    0    0
    32    Locked    41    0    0
    3.1 Downstream channels

    Channel    Channel Width (MHz)    FFT Type    Number of Active Subcarriers    Modulation (Active Profile)    First Active Subcarrier (Hz)
    159    190    4K    3736    QAM 4096    148
    3.1 Downstream channels

    Channel ID    Locked Status    RxMER Data (dB)    PLC Power (dBmV)    Corrected errors (Active Profile)    Uncorrectable errors (Active Profile)
    159    Locked    37    -5.3    756302188    0

                                    ---------------------
    3.0 Upstream channels

    Channel    Frequency (Hz)    Power (dBmV)    Symbol Rate (ksps)    Modulation    Channel ID
    0    49600000    47.5    5120    QAM 64    1
    1    43100000    47    5120    QAM 64    2
    2    36600000    47    5120    QAM 64    3
    3    30100000    46    5120    QAM 64    4
    4    23600000    46    5120    QAM 64    5
    3.0 Upstream channels

    Channel    Channel Type    T1 Timeouts    T2 Timeouts    T3 Timeouts    T4 Timeouts
    0    ATDMA    0    0    0    0
    1    ATDMA    0    0    0    0
    2    ATDMA    0    0    0    0
    3    ATDMA    0    0    0    0
    4    ATDMA    0    0    0    0
    3.1 Upstream channels

    Channel    Channel Width (MHz)    Power (dBmV)    FFT Type    Modulation
    6    10    41.5    2K    QAM 256
    3.1 Upstream channels

    Channel    Channel Type    Number of Active Subcarriers    First Active Subcarrier (Hz)    T3 Timeouts    T4 Timeouts
    6    OFDMA    200    74000000    0    0
    ----                        -----------------------

     

  • There doesn't seem to be a pattern in the log, but I see these cropping up:

    DBC-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;

    SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;

    CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 2 3.;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;

    Dynamic Range Window violation

  • legacy1's avatar
    legacy1
    Alessandro Volta

    well if it happens again don't reboot the hub post the logs again