Forum Discussion

Peav's avatar
Peav
On our wavelength
3 months ago

Massive Pre and Post RS errors

Hi VM,

Can you run a line test on my connection? We've had issues with the line for a year or so now, since a neighbour had VM installed. These are the current line stats since I last rebooted the modem on Monday 25th October:

Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
11630000000.339QAM 2564
21390000001.335QAM 2561
31550000000.440QAM 2563
41710000000.640QAM 2565
51790000000.935QAM 2566
61870000000.539QAM 2567
7195000000039QAM 2568
82030000000.935QAM 2569
9211000000039QAM 25610
10227000000138QAM 25612
112350000001.441QAM 25613
122590000000.541QAM 25616
132670000001.241QAM 25617
142910000001.641QAM 25620
152990000000.941QAM 25621
163230000000.739QAM 25624
17339000000-1.339QAM 25626
183550000000.840QAM 25628
193630000000.340QAM 25629
203870000000.941QAM 25632
214190000000.840QAM 25636
224270000000.741QAM 25637
234510000000.541QAM 25640
244590000000.541QAM 25641
25467000000041QAM 25642
264750000000.341QAM 25643
274830000000.340QAM 25644
284910000000.140QAM 25645
294990000000.141QAM 25646
305070000000.241QAM 25647
315150000000.240QAM 25648

3.0 Downstream channels

Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors
1Locked39486955228556
2Locked3521215124361
3Locked4015961210005
4Locked4015901012368
5Locked3538726618468
6Locked3936911216164
7Locked3929605312710
8Locked35175537911705
9Locked391820495319
10Locked38846212864
11Locked41934022167
12Locked41860181886
13Locked411525641670
14Locked4116852616
15Locked4111806265
16Locked39232831137
17Locked3916943838
18Locked4015052593
19Locked4014038521
20Locked41534566
21Locked40656796
22Locked41270042419
23Locked417306175
24Locked41614614
25Locked4149821
26Locked4150395
27Locked40545411
28Locked4050550
29Locked4138310
30Locked4131610
31Locked4031470

I run the hub in modem mode, connected to an Opnsense Firewall box and the speed test results connected via the 2,5gb ports look like this:

 

Timestamp (GMT) Server id Server name Download Upload Latency
2024-11-02T11:20:324058Wildcard Networks, Newcastle upon Tyne42.6390.0730.22
2024-11-02T11:11:104058Wildcard Networks, Newcastle upon Tyne2.5586.5694.70
2024-11-02T11:08:3025646Odyssey Systems Limited, Stockton-on-Tees4.9399.1975.07
2024-10-25T12:14:304058Wildcard Networks, Newcastle upon Tyne1142.55103.6127.95
2024-10-25T12:08:204058Wildcard Networks, Newcastle upon Tyne44.0889.3628.13
2024-10-25T11:57:0163731Virgin Media, London9.6385.7427.99
2024-10-25T11:22:3763731Virgin Media, London38.0391.4627.83
2024-10-14T20:25:4225646Odyssey Systems Limited, Stockton-on-Tees1111.4598.4823.97
2024-10-14T18:51:5925646Odyssey Systems Limited, Stockton-on-Tees40.9094.8624.55
2024-10-14T18:51:0663731Virgin Media, London42.1079.1526.53
2024-10-14T09:06:164058Wildcard Networks, Newcastle upon Tyne43.9290.9927.97
2024-10-14T08:43:434058Wildcard Networks, Newcastle upon Tyne43.92104.3228.00
2024-10-14T07:59:4017449razorblue, Leeds3.34103.3183.18

I don't have an omnibox setup on the house as the incoming cable runs into a rediffusion box built into the wall. The drop from the tap point to the house is most likely the original cable from when blueyonder were doing the installs around 20+ years ago.

Thanks.

Peav

  • Tudor's avatar
    Tudor
    Very Insightful Person
    3 months ago

    Does not look good, but must also have the upstream and hub log.

  • Peav's avatar
    Peav
    On our wavelength
    3 months ago

    Upload stats: These look ok. and speeds are always 90-100mbit

    3.0 Upstream channels

    Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID
    04960000046.55120QAM 649
    14310000046.85120QAM 6410
    23660000047.55120QAM 6411
    33010000048.55120QAM 6412
    42360000047.55120QAM 6413

    3.0 Upstream channels

    Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts
    0ATDMA0000
    1ATDMA0000
    2ATDMA0000
    3ATDMA0001
    4ATDMA00201

    3.1 Upstream channels

    Channel Channel Width (MHz) Power (dBmV) FFT Type Modulation
    141041.02KQAM 256

    3.1 Upstream channels

    Channel Channel Type Number of Active Subcarriers First Active Subcarrier (Hz) T3 Timeouts T4 Timeouts
    14OFDMA2007400000000
    • Tudor's avatar
      Tudor
      Very Insightful Person
      3 months ago

      I think you possibly need a technician’s visit, but first check all cables are tight.

      • Peav's avatar
        Peav
        On our wavelength
        3 months ago

        Thanks Tudor,

        I doubled checked the connections were tight on the 25th. Speeds from over the weekend in the screen below - going from 1gbit to 40mbit.

         

  • Peav's avatar
    Peav
    On our wavelength
    3 months ago

    Network Log

    Time Priority Description
    02-11-2024 15:21:52noticeCM-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=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 15:15:38noticeCM-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=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 15:12:53noticeCM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 15:07:26noticeCM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 15:03:33noticeCM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 14:58:12noticeCM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 14:49:56noticeCM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 14:46:39noticeCM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 14:42:02noticeCM-STATUS message sent. Event Type Code: 5; Chan ID: 3; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 14:42:02noticeCM-STATUS message sent. Event Type Code: 2; Chan ID: 33; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 14:36:12noticeCM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 14:24:53noticeCM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 14:22:55noticeCM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 13:57:38noticeCM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 13:55:12noticeCM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 13:50:15noticeCM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 13:48:49noticeCM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 13:38:07noticeCM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 13:35:00noticeCM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 13:24:13noticeCM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 13:21:49noticeCM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 13:18:15noticeCM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 13:08:23noticeCM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 13:02:13noticeCM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 13:01:51noticeCM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 12:59:33noticeCM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 12:55:32noticeCM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 12:50:20noticeCM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 12:35:54noticeCM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 12:33:24noticeCM-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=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 12:30:48noticeCM-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=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    02-11-2024 12:17:07noticeCM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
  • chris_s's avatar
    chris_s
    Dialled in
    3 months ago

    Is your cable a single run from the wall box into the cable modem or do you have two with a joiner? I was getting lots of pre and post RS errors until I removed the joiner and used a single piece of coax from the wall to the modem, now I hardly have any pre and no post at all.

    • Peav's avatar
      Peav
      On our wavelength
      3 months ago

      Its a single run from the isolator outside to the modem.

      • Matthew_ML's avatar
        Matthew_ML
        Forum Team
        3 months ago

        Hey Peav, thank you for reaching out and I am so sorry you are having some connection issues.

        Let me send you a PM over and we will look into this.