U

Wednesday, August 21st, 2024 6:24 PM

Getting Internet dropping T3 and sync issues in log

Hi there,

I am trying to escalate this issue.  I am not getting much support for Xfinity.

I recently moved into this house and they already had xfinity.  I turned on the service, and I am getting intermittent dropouts during my Zoom meetings - sometimes multiple per hour. 

This service is critical for my business, and on zoom calls it's pausing me for 20-30s intermittently.  This is causing me nothing but frustration for me and my customers. 

From the questions I have read in this community service, it seems that they need to check the pole to cable.

I am seeing in the logs Time syncing errors and T3 errors in the log, also time sync is returning back 1970:
Can someone help escalate this for me - I need this fixed ASAP. 

Cable Diagnostic
Startup Procedure
CM status:  OPERATIONAL
DownstreamChannel: 495000000Hz Locked
ConnectivityState: OK operational(12),
BootState:  OK Operational
Security:  Enabled
IPProvisioningMode: 12 IPv6Only

Downstream Bonded Channels
Channel LockedStatus Modulation Channel ID Frequency Power  SNR Correctables Uncorrectables
1 Locked  256 QAM  20  495000000 Hz -7.7 dBmV 40.6 dB 152  0
2 Locked  256 QAM  13  453000000 Hz -8.1 dBmV 40.6 dB 1149  0
3 Locked  256 QAM  14  459000000 Hz -8.2 dBmV 40.5 dB 1597  0
4 Locked  256 QAM  15  465000000 Hz -9.0 dBmV 40.2 dB 1653  0
5 Locked  256 QAM  16  471000000 Hz -8.3 dBmV 40.5 dB 982  0
6 Locked  256 QAM  17  477000000 Hz -7.9 dBmV 40.7 dB 673  0
7 Locked  256 QAM  18  483000000 Hz -8.1 dBmV 40.6 dB 491  0
8 Locked  256 QAM  19  489000000 Hz -7.8 dBmV 40.8 dB 269  0
9 Locked  256 QAM  21  507000000 Hz -7.5 dBmV 40.9 dB 38  0
10 Locked  256 QAM  22  513000000 Hz -7.9 dBmV 40.7 dB 22  0
11 Locked  256 QAM  23  519000000 Hz -8.2 dBmV 39.9 dB 10  0
12 Locked  256 QAM  24  525000000 Hz -8.5 dBmV 40.3 dB 5  0
13 Locked  256 QAM  25  531000000 Hz -8.5 dBmV 40.3 dB 8  0
14 Locked  256 QAM  26  537000000 Hz -8.7 dBmV 40.1 dB 3  0
15 Locked  256 QAM  27  543000000 Hz -8.4 dBmV 40.3 dB 1  0
16 Locked  256 QAM  28  549000000 Hz -8.7 dBmV 40.1 dB 2  0
17 Locked  256 QAM  29  555000000 Hz -9.9 dBmV 39.3 dB 2  0
18 Locked  256 QAM  30  561000000 Hz -8.5 dBmV 39.4 dB 0  0
19 Locked  256 QAM  31  567000000 Hz -8.1 dBmV 40.1 dB 0  0
20 Locked  256 QAM  32  573000000 Hz -7.7 dBmV 40.4 dB 1  0
21 Locked  256 QAM  33  579000000 Hz -7.5 dBmV 40.4 dB 0  0
22 Locked  256 QAM  34  585000000 Hz -6.8 dBmV 40.9 dB 0  0
23 Locked  256 QAM  35  591000000 Hz -6.6 dBmV 40.9 dB 0  0
24 Locked  256 QAM  36  597000000 Hz -7.0 dBmV 40.8 dB 0  0
25 Locked  256 QAM  37  603000000 Hz -6.3 dBmV 41.2 dB 0  0
26 Locked  256 QAM  38  609000000 Hz -6.6 dBmV 41.1 dB 11  0
27 Locked  256 QAM  39  615000000 Hz -6.9 dBmV 40.9 dB 13  0
28 Locked  256 QAM  40  621000000 Hz -5.1 dBmV 41.6 dB 9  0
29 Locked  256 QAM  41  627000000 Hz -5.8 dBmV 41.3 dB 0  0
30 Locked  256 QAM  42  633000000 Hz -5.4 dBmV 41.3 dB 1  0
31 Locked  256 QAM  43  639000000 Hz -5.4 dBmV 41.5 dB 0  0
32 Locked  256 QAM  44  645000000 Hz -5.7 dBmV 41.3 dB 0  0

Upstream Bonded Channels
Channel LockedStatus ChannelType Channel ID SymbolRate Frequency Power
1 Locked  ATDMA  1  5120 Ksym/sec 16400000 Hz 46.0 dBmV
2 Locked  ATDMA  2  5120 Ksym/sec 22800000 Hz 46.8 dBmV
3 Locked  ATDMA  3  5120 Ksym/sec 29200000 Hz 46.3 dBmV
4 Locked  ATDMA  4  5120 Ksym/sec 35600000 Hz 46.5 dBmV
5 Locked  ATDMA  5  5120 Ksym/sec 40400000 Hz 46.5 dBmV
6 Locked  ATDMA  6  5120 Ksym/sec 10400000 Hz 45.0 dBmV
7 Not Locked Unknown  0  0 Ksym/sec 0 Hz  0 dBmV
8 Not Locked Unknown  0  0 Ksym/sec 0 Hz  0 dBmV

Downstream OFDM Channels
Channel Channel ID Frequency Power  SNR/MER  ActiveSubcarrier Correctable Uncorrectable
1 193  690000000 Hz -5.5 dBmV 40.9 dB  1108 ~ 2987  844241684  0 
2 0  0 Hz  0 dBmV  0 dB  0 ~ 0   0  0

Upstream OFDMA Channels
Channel UpstreamMuted RangingStatus Subc Zero Freq ActiveSubcarrier SymbolsPerFrame Power
1 n/a  Other  0 MHz  0 ~ 0   0  0 dBmV
2 n/a  Other  0 MHz  0 ~ 0   0  0 dBmV

Time Priority Description
2024-08-21 12:03:20 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
2024-08-21 12:03:15 Notice (6) DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:33 Notice (6) Honoring MDD; IP provisioning mode = IPv6
1970-01-01 00:00:24 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
2024-08-15 07:34:27 Critical (3) SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=54:07:7d:43:93:0b;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:24 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
2024-07-07 19:55:11 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
2024-07-07 12:37:30 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
2024-07-07 00:44:12 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:24 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=5;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;

Official Employee

 • 

1.4K Messages

3 months ago

Hi there, @user_7g8j2u ! Thank you so much for reaching your Digital Care team. I appreciate your patience while you waited to connect with me. I'm very sorry for the trouble you are having with your Internet service, I know how frustrating it is to have connectivity issues. Please be assured you reached the right person to assist you. Can you please DM me your first and last name, along with your full service address so that I can assist you further.-Richard

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