Visitor
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Intermittent drops of internet / 30 seconds
We are getting intermittent Internet drops. We have had a tech out 2 times. The line to our home has been replaced, extra splitters removed, and some work done on the box outside the house. We have replaced our modem and router (we own, comcast blamed an older modem). All drivers are up to date.
Any ideas - Motorola modem MB8611 / uptime 13 hours
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I often see t3 and t4 errors in the log
| 07:22:02 Thu Sep 2 2021 |
Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;; | |||
| 07:22:02 Thu Sep 2 2021 |
Critical (3) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out; | |||
| 07:22:45 Thu Sep 2 2021 |
Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;; | |||
| 07:22:45 Thu Sep 2 2021 |
Critical (3) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out; | |||
| 07:23:18 Thu Sep 2 2021 |
Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing; | |||
| 07:23:18 Thu Sep 2 2021 |
Critical (3) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out; | |||
| 07:23:32 Thu Sep 2 2021 |
Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;; | |||
| 07:23:33 Thu Sep 2 2021 |
Critical (3) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out; | |||
| 07:23:44 Thu Sep 2 2021 |
Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;; | |||
| 07:31:56 Thu Sep 2 2021 |
Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing; | |||
| 07:32:02 Thu Sep 2 2021 |
Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing; | |||
| 07:34:23 Thu Sep 2 2021 |
Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;; | |||
| 07:34:24 Thu Sep 2 2021 |
Critical (3) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out; | |||
| 07:34:24 Thu Sep 2 2021 |
Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;; | |||
| 07:34:24 Thu Sep 2 2021 |
Critical (3) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out; | |||
| 07:34:40 Thu Sep 2 2021 |
Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;; | |||
| 07:34:40 Thu Sep 2 2021 |
Critical (3) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out; | |||
| Time Not Established | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;; | |||
| Time Not Established | Critical (3) | No Ranging Response received - T3 time-out; | |||
| Time Not Established | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;; | |||
| Time Not Established | Critical (3) | No Ranging Response received - T3 time-out; | |||
| 11:15:43 Sun Sep 5 2021 |
Critical (3) | Started Unicast Maintenance Ranging - No Response received - T3 time-out; | |||
| Time Not Established | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;; | |||
| Time Not Established | Critical (3) | No Ranging Response received - T3 time-out; | |||
| Time Not Established | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;; | |||
| 22:26:06 Thu Sep 9 2021 |
Critical (3) | Started Unicast Maintenance Ranging - No Response received - T3 time-out; | |||
| 22:26:06 Thu Sep 9 2021 |
Critical (3) | Unicast Maintenance Ranging attempted - No response - Retries exhausted; | |||
| 22:26:06 Thu Sep 9 2021 |
Critical (3) | 16 consecutive T3 timeouts while trying to range on upstream channel 3; | |||
| Time Not Established | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;; | |||
| Time Not Established | Critical (3) | No Ranging Response received - T3 time-out; | |||
| Time Not Established | Notice (6) | Honoring MDD; IP provisioning mode = IPv6 | |||
| 22:35:48 Fri Sep 10 2021 |
Notice (6) | DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.; |
Responses
XfinityGabby
Official Employee
•
204 Messages
1 m ago
Hello, @user_01ef6c. Thank you for taking the time to reach out to us through Forums. We know how frustrating it is to experience service issues. We can certainly look into the issue you're experiencing, please send a Direct Message with your full name and address.
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