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jgnoonan's avatar
jgnoonan
Star
Dec 03, 2017
Solved

CM1000 Xfinity issues

I am quite frustrated at this point.  I had a CM600 modem to support Comcast's Extreme 150 service.  I've had it for a few years and was consistently getting 160 to 170mbps speed from it.  About thre...
CM1000
speed
Troubleshooting
xfinity
  • jgnoonan's avatar
    jgnoonan
    Mar 12, 2018

    Well it is finally fixed.  The tech showed up today and I showed him the two frequencies that were having the problem.  He checked outside, and then at the tap.  He came into the house and said he needed to call a bucket truck in to fix it.  I got a recorded call from Comcast that they were working to fix the issue.  I got a second call an hour later that the issue was fixed.  I ran a speed test and got a consistent 160mbps (yay!).  I used the reset button on the modem and let it re-provision.  All the signal/noise and power levels were good and there were no uncorrectable codewords.  They didn't tell me what they fixed, but at long last, it is fixed.

vkdelta's avatar
vkdelta
NETGEAR Employee Retired
Feb 22, 2018

Slpope99

 

please post power table and event logs screenshots here.

Slpope99's avatar
Slpope99
Aspirant
Feb 22, 2018
TimePriorityDescription
2018-02-21, 21:00:29Notice (6)DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 .;CM-MAC=b0:b9:8a:af:7e:28;CMTS-MAC=00:01:5c:81:9a:5e;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=b0:b9:8a:af:7e:28;CMTS-MAC=00:01:5c:81:9a:5e;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=b0:b9:8a:af:7e:28;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2018-02-21, 20:59:21Critical (3)Resetting the cable modem due to docsDevResetNow
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out;CM-MAC=b0:b9:8a:af:7e:28;CMTS-MAC=00:01:5c:81:9a:5e;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=b0:b9:8a:af:7e:28;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2018-02-21, 20:48:19Critical (3)Resetting the cable modem due to docsDevResetNow
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=b0:b9:8a:af:7e:28;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out;CM-MAC=b0:b9:8a:af:7e:28;CMTS-MAC=00:01:5c:81:9a:5e;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=b0:b9:8a:af:7e:28;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out;CM-MAC=b0:b9:8a:af:7e:28;CMTS-MAC=00:01:5c:81:9a:5e;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=b0:b9:8a:af:7e:28;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;

<tabindex=-1>Startup Procedure
ProcedureStatusComment
Acquire Downstream Channel519000000 HzLocked
Connectivity StateOKOperational
Boot StateOKOperational
SecurityEnableBPI+
IP Provisioning ModeHonor MDDIPv6 only
<tabindex=-1>Downstream Bonded Channels
ChannelLock StatusModulationChannel IDFrequencyPowerSNR / MERUnerrored CodewordsCorrectable CodewordsUncorrectable Codewords
1LockedQAM2561519000000 Hz3.0 dBmV41.3 dB25625342600
2LockedQAM2562525000000 Hz3.0 dBmV41.3 dB25635470300
3LockedQAM2563531000000 Hz3.3 dBmV41.2 dB25636383250
4LockedQAM2564537000000 Hz3.4 dBmV41.3 dB25637244800
5LockedQAM2565543000000 Hz3.2 dBmV41.3 dB25638201760
6LockedQAM2566549000000 Hz2.9 dBmV41.1 dB25639173150
7LockedQAM2567555000000 Hz2.8 dBmV40.9 dB25639968700
8LockedQAM2568561000000 Hz3.3 dBmV40.9 dB25638755300
9LockedQAM2569567000000 Hz2.7 dBmV40.7 dB25642063800
10LockedQAM25610573000000 Hz2.8 dBmV40.8 dB25642938600
11LockedQAM25611579000000 Hz3.3 dBmV38.8 dB25643948600
12LockedQAM25612585000000 Hz3.3 dBmV39.7 dB25644839100
13LockedQAM25613591000000 Hz3.5 dBmV40.3 dB25645834000
14LockedQAM25614597000000 Hz3.1 dBmV40.4 dB25646736100
15LockedQAM25615603000000 Hz3.6 dBmV40.5 dB25647658700
16LockedQAM25616609000000 Hz3.2 dBmV40.5 dB25649426100
17LockedQAM25617615000000 Hz3.0 dBmV40.3 dB25650416500
18LockedQAM25618621000000 Hz3.5 dBmV40.4 dB25651357400
19LockedQAM25619627000000 Hz3.7 dBmV39.7 dB25652360900
20LockedQAM25620633000000 Hz4.4 dBmV40.3 dB25653188100
21LockedQAM25621639000000 Hz4.6 dBmV38.9 dB25654126200
22LockedQAM25622645000000 Hz4.6 dBmV37.2 dB25654577800
23LockedQAM25623651000000 Hz4.7 dBmV35.9 dB25655143300
24LockedQAM25624657000000 Hz4.2 dBmV37.8 dB25655667000
25Not LockedUnknown00 Hz0.0 dBmV0.0 dB000
26Not LockedUnknown00 Hz0.0 dBmV0.0 dB000
27Not LockedUnknown00 Hz0.0 dBmV0.0 dB000
28Not LockedUnknown00 Hz0.0 dBmV0.0 dB000
29Not LockedUnknown00 Hz0.0 dBmV0.0 dB000
30Not LockedUnknown00 Hz0.0 dBmV0.0 dB000
31Not LockedUnknown00 Hz0.0 dBmV0.0 dB000
32Not LockedUnknown00 Hz0.0 dBmV0.0 dB000
<tabindex=-1>Upstream Bonded Channels
ChannelLock StatusModulationChannel IDFrequencyPower
1LockedATDMA135800000 Hz43.8 dBmV
2LockedATDMA229400000 Hz43.3 dBmV
3LockedATDMA323000000 Hz42.5 dBmV
4Not LockedUnknown00 Hz0.0 dBmV
5Not LockedUnknown00 Hz0.0 dBmV
6Not LockedUnknown00 Hz0.0 dBmV
7Not LockedUnknown00 Hz0.0 dBmV
8Not LockedUnknown00 Hz0.0 dBmV
<tabindex=-1>Downstream OFDM Channels
ChannelLock StatusModulation / Profile IDChannel IDFrequencyPowerSNR / MERActive Subcarrier Number RangeUnerrored CodewordsCorrectable CodewordsUncorrectable Codewords
1Locked0, 125708000000 Hz4.2 dBmV36.0 dB1108 ~ 298726207888181649350
2Not Locked000 Hz2.0 dBmV0.0 dB0 ~ 4095000
<tabindex=-1>Upstream OFDMA Channels
ChannelLock StatusModulation / Profile IDChannel IDFrequencyPower
1Not LockedUnknown00 Hz0 dBmV
2Not LockedUnknown00 Hz0 dBmV
Hardware Version2.02
 
Firmware VersionV3.01.04
 
Cable Modem Serial NumberRemoved 
 
CM certificateInstalled
 
CM MACb0:b9:8a:af:7e:28
 
  • vkdelta's avatar
    vkdelta
    NETGEAR Employee Retired
    Feb 22, 2018

    pls post it as screenshot linked to imgur.com or some other site as your columns got cutoff. I cannot see how many uncorrectables in each channel.

    • Slpope99's avatar
      Slpope99
      Aspirant
      Feb 22, 2018
      • vkdelta's avatar
        vkdelta
        NETGEAR Employee Retired
        Feb 22, 2018

        Slpope99

         

        please PM me.