Visitor
•
1 Message
Intermittent Connection Interruption
Hello,
I recently set up my system and have been experiencing repeated temporary losses of connection (this includes both wireless and hardwired Ethernet connections). During the workday, I would estimate about 3-5 interruptions.
Looking at the logs, I'm seeing repeated "No Ranging Response received - T3 time-out" and "SYNC Timing Synchronization failure". Reviewing the troubleshooting tips, I didn't immediately see anything that stood out, but please let me know if I missed something.
The log below is just from overnight after I sent a reset command in the evening:
| Time Not Established | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=XX;CMTS-MAC=XX;CM-QOS=1.1;CM-VER=3.1; | ||
| Time Not Established | Critical (3) | No Ranging Response received - T3 time-out;CM-MAC=XX;CMTS-MAC=XX;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=XX;CMTS-MAC=XX;CM-QOS=1.1;CM-VER=3.1; | ||
| Time Not Established | Critical (3) | No Ranging Response received - T3 time-out;CM-MAC=XX;CMTS-MAC=XX;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=XX;CMTS-MAC=XX;CM-QOS=1.1;CM-VER=3.1; | ||
| Time Not Established | Critical (3) | No Ranging Response received - T3 time-out;CM-MAC=XX;CMTS-MAC=XX;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=XX;CMTS-MAC=XX;CM-QOS=1.1;CM-VER=3.1; | ||
| Time Not Established | Critical (3) | No Ranging Response received - T3 time-out;CM-MAC=XX;CMTS-MAC=XX;CM-QOS=1.1;CM-VER=3.1; | ||
| Time Not Established | Notice (6) | Honoring MDD; IP provisioning mode = IPv6 | ||
| 5:01:10 | Notice (6) | DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=XX;CMTS-MAC=XX;CM-QOS=1.1;CM-VER=3.1; | ||
| Tue Aug 2 2022 | ||||
| 5:01:29 | Notice (6) | CM-STATUS message sent. Event Type Code: 24; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0.;CM-MAC=XX;CMTS-MAC=XX;CM-QOS=1.1;CM-VER=3.1; | ||
| Tue Aug 2 2022 |
Downstream:
| Channel | Lock Status | Modulation | Channel ID | Freq. (MHz) | Pwr (dBmV) | SNR (dB) | Corrected | Uncorrected |
| 1 | Locked | QAM256 | 5 | 507 | 4 | 44 | 0 | 0 |
| 2 | Locked | QAM256 | 2 | 489 | 4.3 | 44.1 | 0 | 0 |
| 3 | Locked | QAM256 | 3 | 495 | 4.2 | 44.1 | 0 | 0 |
| 4 | Locked | QAM256 | 4 | 501 | 4 | 44 | 0 | 0 |
| 5 | Locked | QAM256 | 6 | 513 | 4 | 43.8 | 0 | 0 |
| 6 | Locked | QAM256 | 7 | 519 | 4.2 | 43.9 | 0 | 0 |
| 7 | Locked | QAM256 | 8 | 525 | 4.4 | 44 | 0 | 0 |
| 8 | Locked | QAM256 | 9 | 531 | 4.3 | 43.9 | 0 | 0 |
| 9 | Locked | QAM256 | 10 | 537 | 3.9 | 43.6 | 0 | 0 |
| 10 | Locked | QAM256 | 11 | 543 | 3.6 | 43.5 | 0 | 0 |
| 11 | Locked | QAM256 | 12 | 549 | 4.1 | 43.7 | 0 | 0 |
| 12 | Locked | QAM256 | 13 | 555 | 4.3 | 43.9 | 0 | 0 |
| 13 | Locked | QAM256 | 14 | 561 | 4.1 | 43.7 | 0 | 0 |
| 14 | Locked | QAM256 | 15 | 567 | 3.6 | 43.4 | 0 | 0 |
| 15 | Locked | QAM256 | 16 | 573 | 3.4 | 43.3 | 0 | 0 |
| 16 | Locked | QAM256 | 17 | 579 | 3.6 | 43.6 | 0 | 0 |
| 17 | Locked | QAM256 | 18 | 585 | 3.4 | 43.4 | 0 | 0 |
| 18 | Locked | QAM256 | 19 | 591 | 3 | 43 | 0 | 0 |
| 19 | Locked | QAM256 | 20 | 597 | 3.3 | 43 | 0 | 0 |
| 20 | Locked | QAM256 | 21 | 603 | 3.7 | 43.3 | 0 | 0 |
| 21 | Locked | QAM256 | 22 | 609 | 3.7 | 43.4 | 0 | 0 |
| 22 | Locked | QAM256 | 23 | 615 | 3.4 | 43.1 | 0 | 0 |
| 23 | Locked | QAM256 | 24 | 621 | 3 | 42.9 | 0 | 0 |
| 24 | Locked | QAM256 | 25 | 627 | 3.4 | 43.1 | 0 | 0 |
| 25 | Locked | QAM256 | 26 | 633 | 3.7 | 43.4 | 0 | 0 |
| 26 | Locked | QAM256 | 27 | 639 | 3.7 | 43.4 | 0 | 0 |
| 27 | Locked | QAM256 | 28 | 645 | 3.5 | 43.2 | 0 | 0 |
| 28 | Locked | QAM256 | 29 | 651 | 3.3 | 43.1 | 0 | 0 |
| 29 | Locked | QAM256 | 30 | 657 | 3.7 | 43.4 | 0 | 0 |
| 30 | Locked | QAM256 | 31 | 663 | 3.9 | 43.5 | 0 | 0 |
| 31 | Locked | QAM256 | 32 | 669 | 4 | 43.5 | 0 | 0 |
| 32 | Locked | OFDM PLC | 37 | 690 | 4.2 | 43.3 | 3707046 | 0 |
Upstream:
| Channel | Lock Status | Channel Type | Channel ID | Symb. Rate (Ksym/sec) | Freq. (MHz) | Pwr (dBmV) |
| 1 | Locked | SC-QAM | 1 | 5120 | 35.6 | 43.8 |
| 2 | Locked | SC-QAM | 2 | 5120 | 29.2 | 43.8 |
| 3 | Locked | SC-QAM | 3 | 5120 | 22.8 | 43 |
| 4 | Locked | SC-QAM | 4 | 5120 | 16.4 | 43.3 |
| 5 | Locked | SC-QAM | 5 | 1280 | 39.6 | 43.8 |
XfinityAmira
Official Employee
•
2.8K Messages
2 m ago
Hello and thanks for taking the time to reach out to us on our Forums page. We're so thankful to have you as a customer, and it's upsetting to know you have been experiencing connection issues every day. We definitely know the importance of having a solid and steady connection, so I am sorry to hear that has not been the case for you. We appreciate you posting your modem logs, and we would love to take a further look into everything on our end. To best assist you with this further, please send us a Private Direct Message.
Here are the detailed steps to direct message us:
• Click "Sign In" if necessary
• Click the "Direct Message icon” (upper right corner of this page)
• Click the "New message" (pencil and paper) icon
• Type "Xfinity Support" in the to line and select "Xfinity Support" from the drop-down list
• Type your message in the text area near the bottom of the window
• Press Enter to send your message
0
0