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zepol's avatar
zepol
Aspirant
Jul 10, 2023

CM1200 Intermittent connection loss

CM1200

Firmware version - 3.12.03

I have Xfinity and my connection will drop multiple times a day.

 

 

 

 
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Frequency start Value
This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect.
Starting Frequency
 

Startup Procedure

ProcedureStatusComment
Acquire Downstream Channel579000000 HzLocked
Connectivity StateOKOperational
Boot StateOKOperational
SecurityEnabledBPI+
IP Provisioning ModeHonor MDDhonorMdd(4)
 

Downstream Bonded Channels

ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectablesUncorrectables
1LockedQAM25632579000000 Hz-4.9 dBmV37.8 dB1055726
2LockedQAM2564405000000 Hz-3.4 dBmV38.9 dB00
3LockedQAM2565411000000 Hz-3.1 dBmV39.1 dB00
4LockedQAM2566417000000 Hz-2.8 dBmV39.2 dB00
5LockedQAM2567423000000 Hz-2.6 dBmV39.3 dB00
6LockedQAM2568429000000 Hz-2.4 dBmV39.4 dB00
7LockedQAM2569435000000 Hz-2.2 dBmV39.5 dB00
8LockedQAM25610441000000 Hz-2.2 dBmV39.5 dB00
9LockedQAM25611447000000 Hz-1.9 dBmV39.6 dB00
10LockedQAM25612453000000 Hz-2.1 dBmV39.5 dB00
11LockedQAM25613459000000 Hz-2.1 dBmV39.6 dB00
12LockedQAM25614465000000 Hz-2.4 dBmV39.4 dB00
13LockedQAM25615471000000 Hz-2.4 dBmV39.4 dB00
14LockedQAM25616477000000 Hz-2.5 dBmV39.3 dB00
15LockedQAM25617483000000 Hz-2.3 dBmV39.5 dB00
16LockedQAM25618489000000 Hz-2.5 dBmV39.3 dB00
17LockedQAM25619495000000 Hz-2.4 dBmV39.3 dB00
18LockedQAM25620507000000 Hz-2.7 dBmV39.2 dB00
19LockedQAM25621513000000 Hz-2.8 dBmV39.1 dB00
20LockedQAM25622519000000 Hz-2.9 dBmV39.1 dB00
21LockedQAM25623525000000 Hz-3.1 dBmV39 dB00
22LockedQAM25624531000000 Hz-3.3 dBmV38.8 dB00
23LockedQAM25625537000000 Hz-3.5 dBmV38.6 dB00
24LockedQAM25626543000000 Hz-4.2 dBmV38.3 dB00
25LockedQAM25627549000000 Hz-4.6 dBmV38.1 dB00
26LockedQAM25628555000000 Hz-4.7 dBmV38.1 dB00
27LockedQAM25629561000000 Hz-4.8 dBmV38 dB00
28LockedQAM25630567000000 Hz-5 dBmV37.9 dB00
29LockedQAM25631573000000 Hz-5.1 dBmV37.8 dB00
30LockedQAM25633585000000 Hz-4.8 dBmV37.9 dB00
31LockedQAM25634591000000 Hz-5 dBmV37.9 dB00
32Not LockedUnknown00 Hz0.0 dBmV0.0 dB00
 

Upstream Bonded Channels

ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
1LockedATDMA12560 Ksym/sec10400000 Hz46.8 dBmV
2LockedATDMA35120 Ksym/sec22800000 Hz46.3 dBmV
3LockedATDMA45120 Ksym/sec29200000 Hz46 dBmV
4LockedATDMA55120 Ksym/sec35600000 Hz45 dBmV
5Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
6Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
7Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
8Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
 

Downstream OFDM Channels

ChannelLock
Status		Modulation /
Profile ID		Channel
ID		FrequencyPowerSNR /
MER		Active Subcarrier
Number Range		Unerrored
Codewords		Correctable
Codewords		Uncorrectable
Codewords
1Locked0 ,1 ,2 ,348850000000 Hz-5.6 dBmV36.5 dB1108 ~ 298718531172179417880
2Not Locked000 Hz0 dBmV0.0 dB0 ~ 4095000
 

Upstream OFDMA Channels

ChannelLock StatusModulation / Profile IDChannel IDFrequencyPower
1Not Locked000 Hz0 dBmV
2Not Locked000 Hz0 dBmV
 

Extended Upstream Transmit PowerEnable Extended Upstream Transmit Power

 

Current System Time:Mon Jul 10 15:53:24 2023System Up Time:00:16:58

 

 

2 Replies

  • zepol's avatar
    zepol
    Aspirant
    Jul 10, 2023

    Event log

     
     
     
     
    TimePriorityDescription
    Mon Jul 10 15:37:19 2023Notice (6)CM-STATUS message sent. Event Type Code: 5; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Mon Jul 10 15:37:11 2023Warning (5)REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Mon Jul 10 15:37:06 2023Notice (6)DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Mon Jul 10 15:37:01 2023Notice (6)TLV-11 - unrecognized OID;CM-MAC=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Time Not EstablishedNotice (6)Honoring MDD; IP provisioning mode = IPv6
    Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=34:98:b5:cf:59:c9;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
    Mon Jul 10 15:31:40 2023Warning (5)MDD message timeout;CM-MAC=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Mon Jul 10 15:31:40 2023Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Mon Jul 10 15:31:25 2023Notice (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=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Mon Jul 10 15:31:24 2023Notice (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=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Mon Jul 10 15:24:09 2023Notice (6)CM-STATUS message sent. Event Type Code: 5; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Mon Jul 10 15:23:59 2023Warning (5)REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Mon Jul 10 15:23:53 2023Notice (6)DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Mon Jul 10 15:23:48 2023Notice (6)TLV-11 - unrecognized OID;CM-MAC=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Time Not EstablishedNotice (6)Honoring MDD; IP provisioning mode = IPv6
    Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out;CM-MAC=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=34:98:b5:cf:59:c9;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
    Mon Jul 10 15:22:45 2023Critical (3)Resetting the cable modem due to docsDevResetNow
    Mon Jul 10 13:37:02 2023Notice (6)CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Mon Jul 10 13:36:28 2023Notice (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=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Mon Jul 10 13:34:17 2023Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Mon Jul 10 13:20:23 2023Notice (6)CM-STATUS message sent. Event Type Code: 5; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Mon Jul 10 13:20:17 2023Warning (5)REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Mon Jul 10 13:20:12 2023Notice (6)DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Mon Jul 10 13:20:07 2023Notice (6)TLV-11 - unrecognized OID;CM-MAC=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Time Not EstablishedNotice (6)Honoring MDD; IP provisioning mode = IPv6
    Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=34:98:b5:cf:59:c9;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
    Sat Jul 08 14:41:36 2023Notice (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=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Sat Jul 08 14:41:11 2023Notice (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=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Sat Jul 08 09:03:14 2023Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Sat Jul 08 08:25:01 2023Notice (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=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Sat Jul 08 08:24:03 2023Notice (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=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Sat Jul 08 08:17:34 2023Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Sat Jul 08 08:15:38 2023Warning (5)Dynamic Range Window violation
    Sat Jul 08 08:15:38 2023Warning (5)RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Sat Jul 08 08:14:24 2023Notice (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=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Sat Jul 08 08:13:48 2023Notice (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=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Sat Jul 08 08:02:21 2023Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Sat Jul 08 07:59:41 2023Notice (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=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
    Sat Jul 08 07:58:59 2023Notice (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=34:98:b5:cf:59:c9;CMTS-MAC=00:01:5c:78:de:6e;CM-QOS=1.1;CM-VER=3.1;
  • FURRYe38's avatar
    FURRYe38
    Guru - Experienced User
    Jul 10, 2023

    Any Criticals, Errors or Warnings seen in the event logs needs to be reviewed and resolved by the ISP. Indicates a signal issue on the ISP line up to the modem.

    Be sure your using a good quality LAN cable between the modem and router. CAT6 is recommended. 

    What is the brand and model of the host wifi router connected to the modem? 

     

    Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.

    Be sure there are no coax cable line splitters in the between the modem and ISP service box. 

    Be sure your using good quality RG6 coax cable up to the modem. 

    Start with removing any amplifiers, signal attenuators, or splitters from the coax.

    From there check the line for kinks, damage, moisture in the line.

    Check the connectors for improperly made ends, foil touching the copper coax line, loose connections, bad/old/cheap connectors, or corroded connections. Replace them if you do.

    Be sure to power OFF the modem for 1 minute then back ON.

    https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Modems/m-p/1530376#M12853

    https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router

    https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html

    https://highspeed.tips/docsis-events/