2 Messages
Another SYNC Timing Synchronization failure
Hi - Please help, I've been having frequent disconnects. MB8611 modem.
Typical Event Log, occasion T3 timeout (not shown):
| Time | Priority | Description |
| Time Not Established | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=MB8611;CMTS-MAC=REMOTE;CM-QOS=1.1;CM-VER=3.1; |
| 17:43:08 Sat Mar 23 2024 |
Critical (3) | UCD invalid or channel unusable;CM-MAC=MB8611;CMTS-MAC=REMOTE;CM-QOS=1.1;CM-VER=3.1; |
| Time Not Established | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=MB8611;CMTS-MAC=REMOTE;CM-QOS=1.1;CM-VER=3.1; |
| 22:50:52 Sat Mar 23 2024 |
Critical (3) | UCD invalid or channel unusable;CM-MAC=MB8611;CMTS-MAC=REMOTE;CM-QOS=1.1;CM-VER=3.1; |
| Time Not Established | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=MB8611;CMTS-MAC=REMOTE;CM-QOS=1.1;CM-VER=3.1; |
| 00:00:27 Sun Mar 24 2024 |
Critical (3) | UCD invalid or channel unusable;CM-MAC=MB8611;CMTS-MAC=REMOTE;CM-QOS=1.1;CM-VER=3.1; |
| Time Not Established | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=MB8611;CMTS-MAC=REMOTE;CM-QOS=1.1;CM-VER=3.1; |
| Time Not Established | Notice (6) | Honoring MDD; IP provisioning mode = IPv6 |
| 04:41:57 Sun Mar 24 2024 |
Notice (6) | DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=MB8611;CMTS-MAC=REMOTE;CM-QOS=1.1;CM-VER=3.1; |
| 04:42:06 Sun Mar 24 2024 |
Critical (3) | UCD invalid or channel unusable;CM-MAC=MB8611;CMTS-MAC=REMOTE;CM-QOS=1.1;CM-VER=3.1; |
| 04:47:39 Sun Mar 24 2024 |
Notice (6) | CM-STATUS message sent. Event Type Code: 24; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0.;CM-MAC=MB8611;CMTS-MAC=REMOTE;CM-QOS=1.1;CM-VER=3.1; |
| Cable Specification Version | DOCSIS 3.1 |
| Hardware Version | V1.0 |
| Software Version | 8611-19.2.18 |
| Cable Modem MAC Address | |
| Cable Modem Serial Number | |
| CM Certificate | Installed |
| Prod_19.2_d31 |
| Startup Step | Status | Comment |
| Acquire Downstream Channel | 435000000 Hz | Locked |
| Upstream Connection | OK | Operational |
| Boot State | OK | Operational |
| Configuration File | OK | |
| Security | Enabled | BPI+ |
| Channel | Lock Status | Modulation | Channel ID | Freq. (MHz) | Pwr (dBmV) | SNR (dB) | Corrected | Uncorrected |
| 1 | Locked | QAM256 | 4 | 435.0 | 0.2 | 44.7 | 0 | 0 |
| 2 | Locked | QAM256 | 1 | 417.0 | 0.3 | 44.8 | 0 | 0 |
| 3 | Locked | QAM256 | 2 | 423.0 | 0.2 | 44.7 | 0 | 0 |
| 4 | Locked | QAM256 | 3 | 429.0 | 0.2 | 44.7 | 0 | 0 |
| 5 | Locked | QAM256 | 5 | 441.0 | 0.1 | 44.7 | 0 | 0 |
| 6 | Locked | QAM256 | 6 | 447.0 | 0.3 | 44.9 | 0 | 0 |
| 7 | Locked | QAM256 | 7 | 453.0 | 0.3 | 44.9 | 0 | 0 |
| 8 | Locked | QAM256 | 8 | 459.0 | 0.3 | 44.7 | 0 | 0 |
| 9 | Locked | QAM256 | 9 | 465.0 | 0.4 | 44.9 | 0 | 0 |
| 10 | Locked | QAM256 | 10 | 471.0 | 0.5 | 44.8 | 0 | 0 |
| 11 | Locked | QAM256 | 11 | 477.0 | 0.5 | 44.8 | 0 | 0 |
| 12 | Locked | QAM256 | 12 | 483.0 | 0.5 | 44.9 | 0 | 0 |
| 13 | Locked | QAM256 | 13 | 489.0 | 0.6 | 44.8 | 0 | 0 |
| 14 | Locked | QAM256 | 14 | 495.0 | 0.7 | 45.0 | 0 | 0 |
| 15 | Locked | QAM256 | 15 | 501.0 | 0.7 | 44.9 | 0 | 0 |
| 16 | Locked | QAM256 | 16 | 507.0 | 0.7 | 44.9 | 0 | 0 |
| 17 | Locked | QAM256 | 17 | 513.0 | 0.7 | 45.0 | 0 | 0 |
| 18 | Locked | QAM256 | 18 | 519.0 | 0.6 | 44.8 | 0 | 0 |
| 19 | Locked | QAM256 | 19 | 525.0 | 0.6 | 44.7 | 0 | 0 |
| 20 | Locked | QAM256 | 20 | 531.0 | 0.6 | 44.7 | 0 | 0 |
| 21 | Locked | QAM256 | 21 | 537.0 | 0.5 | 44.7 | 0 | 0 |
| 22 | Locked | QAM256 | 22 | 543.0 | 0.5 | 44.5 | 0 | 0 |
| 23 | Locked | QAM256 | 23 | 549.0 | 0.4 | 44.5 | 0 | 0 |
| 24 | Locked | QAM256 | 24 | 555.0 | 0.4 | 44.5 | 0 | 0 |
| 25 | Locked | QAM256 | 25 | 561.0 | 0.5 | 44.5 | 0 | 0 |
| 26 | Locked | QAM256 | 26 | 567.0 | 0.6 | 44.5 | 0 | 0 |
| 27 | Locked | QAM256 | 27 | 573.0 | 0.7 | 44.5 | 0 | 0 |
| 28 | Locked | QAM256 | 28 | 579.0 | 0.8 | 44.5 | 0 | 0 |
| 29 | Locked | QAM256 | 29 | 585.0 | 0.8 | 44.5 | 0 | 0 |
| 30 | Locked | QAM256 | 30 | 591.0 | 0.8 | 44.5 | 0 | 0 |
| 31 | Locked | QAM256 | 31 | 597.0 | 0.8 | 44.4 | 0 | 0 |
| 32 | Locked | QAM256 | 32 | 603.0 | 0.8 | 44.6 | 0 | 0 |
| 33 | Locked | OFDM PLC | 193 | 957.0 | 1.3 | 43.9 | 21097745 | 0 |
| Channel | Lock Status | Channel Type | Channel ID | Symb. Rate (Ksym/sec) | Freq. (MHz) | Pwr (dBmV) |
| 1 | Locked | SC-QAM | 1 | 5120 | 16.4 | 42.3 |
| 2 | Locked | SC-QAM | 2 | 5120 | 22.8 | 42.5 |
| 3 | Locked | SC-QAM | 3 | 5120 | 29.2 | 43.0 |
| 4 | Locked | SC-QAM | 4 | 5120 | 35.6 | 43.3 |
XfinityBradM
Official Employee
•
915 Messages
1 year ago
Hey there, @user_error_error. Our team can definitely understand how stressful and irritating it is to have issues with your internet connection. We all work from home on this end of the screen so we can completely relate to how it causes you to make arrangements that you didn't expect. What sort of troubleshoot steps have you taken from your end? Are you noticing the disconnects on a few devices or across your network as a whole?
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