Frequent Internet dropouts and Superhub logs "SYNC Timing Synchronization failure"
Hi,
Historically my Virgin Media broadband has been very stable - which is good as I work from home and rely on it!
However in the last few days I've increasingly had a number of short (< 5min) dropouts. I've noted about 6 so far today. I rebooted the Superhub Friday, and again this morning, but they continue,
The network log on my SuperHub (v3) has these messages at the same time "SYNC Timing Synchronization failure - Loss of Sync" - recent log entries provided below. I've also included Upstream and Downstream status below.
I would observe that the connection box where the cable comes from the street and splits at my house looks pretty dodgy.
Hope someone can help!
Cheers, Ed
Upstream bonded channels
Channel | Frequency (Hz) | Power (dBmV) | Symbol Rate (ksps) | Modulation | Channel ID |
1 | 49600000 | 51 | 5120 | 64 qam | 1 |
Upstream bonded channels
Channel | Channel Type | T1 Timeouts | T2 Timeouts | T3 Timeouts | T4 Timeouts |
1 | ATDMA | 0 | 0 | 0 | 0 |
Downstream bonded channels
Channel | Frequency (Hz) | Power (dBmV) | SNR (dB) | Modulation | Channel ID |
1 | 187000000 | 4.6 | 40 | 256 qam | 7 |
2 | 139000000 | 4.8 | 40 | 256 qam | 1 |
3 | 147000000 | 4.8 | 40 | 256 qam | 2 |
4 | 155000000 | 4.5 | 38 | 256 qam | 3 |
5 | 163000000 | 4.5 | 38 | 256 qam | 4 |
6 | 171000000 | 4.6 | 40 | 256 qam | 5 |
7 | 179000000 | 4.8 | 40 | 256 qam | 6 |
8 | 195000000 | 4.6 | 40 | 256 qam | 8 |
9 | 203000000 | 5 | 40 | 256 qam | 9 |
10 | 211000000 | 5.5 | 40 | 256 qam | 10 |
11 | 219000000 | 6 | 34 | 256 qam | 11 |
12 | 227000000 | 6 | 38 | 256 qam | 12 |
13 | 235000000 | 5.4 | 40 | 256 qam | 13 |
14 | 243000000 | 4.5 | 40 | 256 qam | 14 |
15 | 251000000 | 4.4 | 40 | 256 qam | 15 |
16 | 259000000 | 4.8 | 40 | 256 qam | 16 |
17 | 267000000 | 5.3 | 40 | 256 qam | 17 |
18 | 275000000 | 5 | 40 | 256 qam | 18 |
19 | 283000000 | 4.9 | 40 | 256 qam | 19 |
20 | 291000000 | 5 | 40 | 256 qam | 20 |
21 | 299000000 | 5.1 | 40 | 256 qam | 21 |
22 | 307000000 | 5.1 | 40 | 256 qam | 22 |
23 | 315000000 | 5.3 | 40 | 256 qam | 23 |
24 | 323000000 | 5 | 40 | 256 qam | 24 |
Downstream bonded channels
Channel | Locked Status | RxMER (dB) | Pre RS Errors | Post RS Errors |
1 | Locked | 40.3 | 191 | 28769 |
2 | Locked | 40.3 | 459 | 36 |
3 | Locked | 40.3 | 5819678 | 4 |
4 | Locked | 38.6 | 999644 | 0 |
5 | Locked | 38.9 | 104 | 0 |
6 | Locked | 40.3 | 83 | 0 |
7 | Locked | 40.9 | 77 | 0 |
8 | Locked | 40.3 | 64 | 0 |
9 | Locked | 40.9 | 61 | 0 |
10 | Locked | 40.3 | 31 | 0 |
11 | Locked | 34.9 | 1916 | 0 |
12 | Locked | 38.9 | 73 | 0 |
13 | Locked | 40.3 | 66 | 0 |
14 | Locked | 40.3 | 79 | 0 |
15 | Locked | 40.3 | 92 | 0 |
16 | Locked | 40.3 | 86 | 0 |
17 | Locked | 40.9 | 55 | 0 |
18 | Locked | 40.3 | 57 | 0 |
19 | Locked | 40.3 | 58 | 0 |
20 | Locked | 40.3 | 84 | 0 |
21 | Locked | 40.3 | 84 | 0 |
22 | Locked | 40.3 | 68 | 0 |
23 | Locked | 40.3 | 93 | 0 |
24 | Locked | 40.3 | 122 | 0 |
29/07/2024 14:57:19 | critical | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=X;CMTS-MAC=X;CM-QOS=1.1;CM-VER=3.0; |
29/07/2024 14:57:2 | critical | SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=X;CMTS-MAC=X;CM-QOS=1.1;CM-VER=3.0; |
29/07/2024 14:04:49 | critical | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=X;CMTS-MAC=X;CM-QOS=1.1;CM-VER=3.0; |
29/07/2024 14:04:31 | critical | SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=X;CMTS-MAC=X;CM-QOS=1.1;CM-VER=3.0; |