I am facing a recurring issue (every few days or so and most often overnight) where my connection drops. It's always quickly resolved after a reboot. Modem is Netgear CM2000 and I'll drop event logs below. Any ideas? I am suspicious it started right after a AT&T tech was on our utility pole recently doing work unrelated.
| Time |
Priority |
Description |
| Thu Aug 28 07:51:17 2025 |
(Notice (6)) |
DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC= |
| Thu Aug 28 07:51:11 2025 |
(Notice (6)) |
TLV-11 - unrecognized OID;CM- |
| Time Not Established |
(Notice (6)) |
Honoring MDD; IP provisioning mode = IPv6 |
| Time Not Established |
(Critical (3)) |
No Ranging Response received - T3 time-out;CM |
| Time Not Established |
(Critical (3)) |
SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM- |
| Time Not Established |
(Critical (3)) |
|
|
|
|
| Time Not Established |
(Critical (3)) |
No Ranging Response received - T3 time-out;CM- |
| Time Not Established |
(Critical (3)) |
SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-; |
| Time Not Established |
(Critical (3)) |
No Ranging Response received - T3 time-out;CM-; |
| Time Not Established |
(Critical (3)) |
SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-; |
| Startup Procedure |
| Procedure |
Status |
Comment |
| Acquire Downstream Channel |
507000000 Hz |
Locked |
| Connectivity State |
OK |
Operational |
| Boot State |
OK |
Operational |
| Security |
Enabled |
BPI+ |
| IP Provisioning Mode |
Honor MDD |
IPv6 only |
|
|
|
| Downstream Bonded Channels |
| Channel |
Lock Status |
Modulation |
Channel ID |
Frequency |
Power |
SNR |
Correctables |
Uncorrectables |
| 1 |
Locked |
QAM256 |
9 |
507000000 Hz |
5.2 dBmV |
40.3 dB |
3 |
0 |
| 2 |
Locked |
QAM256 |
1 |
459000000 Hz |
4.4 dBmV |
39.8 dB |
3 |
0 |
| 3 |
Locked |
QAM256 |
2 |
465000000 Hz |
4.8 dBmV |
40.0 dB |
2 |
0 |
| 4 |
Locked |
QAM256 |
3 |
471000000 Hz |
4.6 dBmV |
40.0 dB |
2 |
0 |
| 5 |
Locked |
QAM256 |
4 |
477000000 Hz |
4.9 dBmV |
40.1 dB |
2 |
0 |
| 6 |
Locked |
QAM256 |
5 |
483000000 Hz |
4.8 dBmV |
40.1 dB |
3 |
0 |
| 7 |
Locked |
QAM256 |
6 |
489000000 Hz |
4.9 dBmV |
40.2 dB |
3 |
0 |
| 8 |
Locked |
QAM256 |
7 |
495000000 Hz |
4.8 dBmV |
40.2 dB |
2 |
0 |
| 9 |
Locked |
QAM256 |
8 |
501000000 Hz |
5.0 dBmV |
40.3 dB |
4 |
0 |
| 10 |
Locked |
QAM256 |
10 |
513000000 Hz |
4.9 dBmV |
40.3 dB |
3 |
0 |
| 11 |
Locked |
QAM256 |
11 |
519000000 Hz |
4.9 dBmV |
40.2 dB |
3 |
0 |
| 12 |
Locked |
QAM256 |
12 |
525000000 Hz |
4.8 dBmV |
40.2 dB |
3 |
0 |
| 13 |
Locked |
QAM256 |
13 |
531000000 Hz |
4.7 dBmV |
39.9 dB |
4 |
0 |
| 14 |
Locked |
QAM256 |
14 |
537000000 Hz |
4.3 dBmV |
39.9 dB |
1 |
0 |
| 15 |
Locked |
QAM256 |
15 |
543000000 Hz |
4.3 dBmV |
40.0 dB |
3 |
0 |
| 16 |
Locked |
QAM256 |
16 |
549000000 Hz |
4.2 dBmV |
40.1 dB |
3 |
0 |
| 17 |
Locked |
QAM256 |
17 |
555000000 Hz |
3.5 dBmV |
40.0 dB |
2 |
0 |
| 18 |
Locked |
QAM256 |
18 |
561000000 Hz |
3.3 dBmV |
40.0 dB |
1 |
0 |
| 19 |
Locked |
QAM256 |
19 |
567000000 Hz |
2.8 dBmV |
39.9 dB |
2 |
0 |
| 20 |
Locked |
QAM256 |
20 |
573000000 Hz |
2.5 dBmV |
39.8 dB |
5 |
0 |
| 21 |
Locked |
QAM256 |
21 |
579000000 Hz |
2.5 dBmV |
39.8 dB |
2 |
0 |
| 22 |
Locked |
QAM256 |
22 |
585000000 Hz |
3.3 dBmV |
39.7 dB |
4 |
0 |
| 23 |
Locked |
QAM256 |
23 |
591000000 Hz |
3.5 dBmV |
39.9 dB |
7 |
0 |
| 24 |
Locked |
QAM256 |
38 |
429000000 Hz |
4.0 dBmV |
39.4 dB |
3 |
0 |
| 25 |
Locked |
QAM256 |
39 |
435000000 Hz |
4.1 dBmV |
39.4 dB |
0 |
0 |
| 26 |
Locked |
QAM256 |
40 |
441000000 Hz |
4.0 dBmV |
39.4 dB |
2 |
0 |
| 27 |
Locked |
QAM256 |
41 |
453000000 Hz |
4.3 dBmV |
39.6 dB |
4 |
0 |
| 28 |
Locked |
QAM256 |
42 |
405000000 Hz |
3.4 dBmV |
38.7 dB |
3 |
0 |
| 29 |
Locked |
QAM256 |
43 |
411000000 Hz |
3.8 dBmV |
38.9 dB |
1 |
0 |
| 30 |
Locked |
QAM256 |
44 |
417000000 Hz |
3.7 dBmV |
39.1 dB |
3 |
0 |
| 31 |
Locked |
QAM256 |
45 |
423000000 Hz |
4.0 dBmV |
39.2 dB |
4 |
0 |
| 32 |
Not Locked |
Unknown |
0 |
0 Hz |
0.0 dBmV |
0.0 dB |
0 |
0 |
|
|
|
| Upstream Bonded Channels |
| Channel |
Lock Status |
US Channel Type |
Channel ID |
Symbol Rate |
Frequency |
Power |
| 1 |
Locked |
ATDMA |
3 |
5120 Ksym/sec |
22800000 Hz |
47.3 dBmV |
| 2 |
Locked |
ATDMA |
1 |
5120 Ksym/sec |
35600000 Hz |
47.0 dBmV |
| 3 |
Locked |
ATDMA |
2 |
5120 Ksym/sec |
29200000 Hz |
47.5 dBmV |
| 4 |
Locked |
ATDMA |
4 |
5120 Ksym/sec |
16400000 Hz |
47.0 dBmV |
| 5 |
Locked |
ATDMA |
9 |
2560 Ksym/sec |
40400000 Hz |
45.0 dBmV |
| 6 |
Not Locked |
Unknown |
0 |
0 |
0 |
0.0 dBmV |
| 7 |
Not Locked |
Unknown |
0 |
0 |
0 |
0.0 dBmV |
| 8 |
Not Locked |
Unknown |
0 |
0 |
0 |
0.0 dBmV |
|
|
|
| Downstream OFDM Channels |
| Channel |
Lock Status |
Profile ID |
Channel ID |
Frequency |
Power |
SNR / MER |
Active Subcarrier
Number Range |
Unerrored
Codewords |
Correctable
Codewords |
Uncorrectable
Codewords |
| 1 |
Locked |
0 ,1 ,2 ,3 |
37 |
722000000 Hz |
7.58 dBmV |
40.4 dB |
1108 ~ 2987 |
3268253 |
3241194 |
0 |
| 2 |
Not Locked |
0 |
0 |
0 Hz |
0 dBmV |
0 dB |
0 ~ 4095 |
0 |
0 |
0 |
|
|
|
| Upstream OFDMA Channels |
| Channel |
Lock Status |
Modulation / Profile ID |
Channel ID |
Frequency |
Power |
| 1 |
Not Locked |
0 |
0 |
0 Hz |
0 dBmV |
| 2 |
Not Locked |
0 |
0 |
0 Hz |
0 dBmV |
|
XfinityRaul
Official Employee
•
2.2K Messages
4 hours ago
@user_29bqsh Thanks for making us aware of your intermittent internet issues via Forums. I would be more than happy to help figure out a solution to this problem. So that we don't go over something you've already done, can you please share with me what troubleshooting steps have you completed on your own? Have you by any chance used the Xfinity app to reset the modem? How about a power cycle, have you tried that?
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