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Forum Discussion

PeteH8sXfinity's avatar
PeteH8sXfinity
Aspirant
Oct 19, 2022

CM1000V2 and comcast, CM1000 SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol

I've been battling disconnects, from 2-10 a day, packet loss, slow speeds. Playing World of Warcraft or Call of Duty becomes unplayable due to normal 50-60ms speeds going to 1100-2000ms+.  I've spen...
PeteH8sXfinity's avatar
PeteH8sXfinity
Aspirant
Oct 20, 2022

I'm going to go ahead and order new cables, should I go higher than CAT6 or will that suffice? I want to best perfomance available.

Thank you!

FURRYe38's avatar
FURRYe38
Guru - Experienced User
Oct 20, 2022

Your main channels have some correct and un-correcables. 

I see the OFDMA channel has tons. This should be near zeros. something the ISP should help you resolve. Something to check the coax cable line and remove any splitters. Check all jack fittings and such. 
Have the ISP check the signal up to the modem as well. Power on the line is a bit on the low side but in spec. 

 

CAT6 UTP is fine. 

 

What is the distance between the modem and router? 
What brand and model router are you using with the CM modem? 

  • PeteH8sXfinity's avatar
    PeteH8sXfinity
    Aspirant
    Oct 20, 2022

    Distance between modem and router is about 2.5 feet. Model of router is: tp-link AX1500 Wi-Fi 6 router.

    • PeteH8sXfinity's avatar
      PeteH8sXfinity
      Aspirant
      Oct 20, 2022

      Archer AX1500

      AX1500 Wi-Fi 6 Router

    • FURRYe38's avatar
      FURRYe38
      Guru - Experienced User
      Oct 20, 2022

      Lets increase the distance to 6 feet between the modem and router. 

      • PeteH8sXfinity's avatar
        PeteH8sXfinity
        Aspirant
        Oct 21, 2022

        Ok so the tech came out from Xfinity. Found a small "kink" in my cable (didn't looks like much tbh). Also removed a splitter. Was stable all of yesterday after he left. Today it is back to normal, stable then for no reason speeds drop and online gaming pings go up to 600-2000ms. I explained to him and showed him that my "time on the modem" is 9 hours ahead of where it should be. He said that does not matter that I'm getting a perfect signal to my modem, and if I continue having issues it's the Netgear modem and that I should consider renting one from xfinity.

         

        Replaced the ethernets to Cat6 and moved the modem. 

         

        Todays error log :2022-10-21, 20:05:33 Notice (6) CM-STATUS message sent. Event Type Code: 4; Chan ID: 28 31 32 34 36 37 38 39 40 41 42 43 44 45 46 47 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-
        2022-10-21, 20:05:32 Notice (6) CM-STATUS message sent. Event Type Code: 23; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;
        2022-10-21, 20:05:25 Warning (5) MDD message timeout;CM-
        2022-10-21, 20:02:01 Notice (6) CM-STATUS message sent. Event Type Code: 23; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM
        2022-10-21, 20:01:46 Notice (6) CM-STATUS message sent. EveCM-MAC=08:36:c9:ce:1a:80;CMTS-MAC=
        2022-10-21, 20:01:45 Notice (6) CM-STATUS message sent. Event Type Code: 23; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=
        2022-10-21, 20:01:30 Notice (6) CM-STATUS message sent. Event Type Code: 22; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=
        2022-10-21, 20:01:30 Notice (6) CM-STATUS message sent. Event Type Code: 23; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=
        2022-10-21, 20:01:14 Notice (6) CM-STATUS message sent. Event Type Code: 22; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=
        2022-10-21, 20:01:13 Notice (6) CM-STATUS message sent. Event Type Code: 23; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=
        2022-10-21, 20:01:02 Notice (6) CM-STATUS message sent. Event Type Code: 22; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC
        2022-10-21, 19:59:04 Notice (6) CM-STATUS message sent. Event Type Code: 23; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=
        2022-10-21, 19:58:50 Notice (6) CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=;
        2022-10-21, 19:58:49 Notice (6) CM-STATUS message sent. Event Type Code: 23; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=;
        2022-10-21, 19:58:47 Notice (6) CM-STATUS message sent. Event Type Code: 4; Chan ID: 28 31 32 34 36 37 38 39 40 41 42 43 44 45 46 47 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=0
        2022-10-21, 19:58:46 Warning (5) MDD message timeout;CM-MAC=
        2022-10-21, 19:58:46 Notice (6) CM-STATUS message sent. Event Type Code: 1; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=
        2022-10-21, 19:58:46 Warning (5) MDD message timeout;CM-MAC=
        2022-10-21, 19:57:59 Notice (6) CM-STATUS message sent. Event Type Code: 1; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=
        2022-10-21, 19:57:44 Warning (5) MDD message timeout;CM-MAC=
        2022-10-21, 19:57:39 Notice (6) CM-STATUS message sent. Event Type Code: 4; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=
        2022-10-21, 19:57:38 Warning (5) MDD message timeout;CM-MAC=
        2022-10-21, 19:57:29 Notice (6) CM-STATUS message sent. Event Type Code: 4; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=
        2022-10-21, 19:57:16 Warning (5) MDD message timeout;CM-MAC=
        2022-10-21, 19:57:00 Notice (6) CM-STATUS message sent. Event Type Code: 20; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=;
        2022-10-21, 19:56:43 Notice (6) CM-STATUS message sent. Event Type Code: 4; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=
        2022-10-21, 19:56:40 Notice (6) CM-STATUS message sent. Event Type Code: 1; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC
        2022-10-21, 19:56:11 Warning (5) MDD message timeout;CM-MAC=
        2022-10-21, 19:55:46 Notice (6) CM-STATUS message sent. Event Type Code: 4; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC
        2022-10-21, 19:55:27 Warning (5) MDD message timeout;CM-MAC=CMTS-MAC=
        2022-10-21, 19:55:11 Notice (6) CM-STATUS message sent. Event Type Code: 4; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;C
        2022-10-21, 19:55:00 Warning (5) MDD message timeout;CM-MAC;CMTS-MAC=
        2022-10-21, 19:54:22 Notice (6) CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1 2 3.;CM-MAC=
        2022-10-21, 19:52:40 Notice (6) CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; 2022-10-21, 19:47:21 Notice (6) CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1
        2022-10-21, 19:47:19 Notice (6) CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=
        2022-10-21, 19:46:01 Notice (6) CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=
        2022-10-21, 19:42:19 Notice (6) CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=
        2022-10-21, 19:41:44 Notice (6) CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=
        2022-10-21, 19:41:40 Notice (6) CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2.;CM-MAC=