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4 Messages
Connectivity Issues with Netgear CM1000
I recently upgraded to gigabit speed last week, a tech came out and checked the outside and regrounded a wire. My new Netgear CM1000 was arriving the next day so he had me call to have them provision which I did. Setup took a couple of attempts but I was up and running. My new equipment works, and speed tests will vary anywhere from 400-900 MBPS depending on when I check. But my real issue is that there have been 3 occurences in the last week where the internet has cut out. When I check the logs of the modem I do see that there are some Critical notices, I just am not so sure what they mean. Cable Connection and Error Log pasted below. Anything I can do to try to fix?
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Error Log
| Time | Priority | Description |
| 2020-05-04, 12:23:57 | Notice (6) | CM-STATUS message sent. Event Type Code: 24; Chan ID: 25; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=38:94:ed:9d:9c:88;CMTS-MAC=00:01:5c:7f:9a:6c;CM-QOS=1.1;CM-VER=3.1; |
| 2020-05-04, 12:23:30 | Notice (6) | CM-STATUS message sent. Event Type Code: 16; Chan ID: 25; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=38:94:ed:9d:9c:88;CMTS-MAC=00:01:5c:7f:9a:6c;CM-QOS=1.1;CM-VER=3.1; |
| 2020-05-04, 12:22:39 | Notice (6) | DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=38:94:ed:9d:9c:88;CMTS-MAC=00:01:5c:7f:9a:6c;CM-QOS=1.1;CM-VER=3.1; |
| Time Not Established | Notice (6) | Honoring MDD; IP provisioning mode = IPv6 |
| Time Not Established | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=38:94:ed:9d:9c:88;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; |
| 2020-05-04, 12:04:35 | Critical (3) | SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=38:94:ed:9d:9c:88;CMTS-MAC=00:01:5c:7f:9a:6c;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=38:94:ed:9d:9c:88;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; |
| 2020-05-04, 09:19:26 | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=38:94:ed:9d:9c:88;CMTS-MAC=00:01:5c:7f:9a:6c;CM-QOS=1.1;CM-VER=3.1; |
| 2020-05-04, 08:35:50 | Critical (3) | Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=38:94:ed:9d:9c:88;CMTS-MAC=00:01:5c:7f:9a:6c;CM-QOS=1.1;CM-VER=3.1; |
| 2020-04-30, 19:15:27 | Critical (3) | Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=38:94:ed:9d:9c:88;CMTS-MAC=00:01:5c:7f:9a:6c;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=38:94:ed:9d:9c:88;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; |
| Time Not Established | Critical (3) | No Ranging Response received - T3 time-out;CM-MAC=38:94:ed:9d:9c:88;CMTS-MAC=00:01:5c:7f:9a:6c;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=38:94:ed:9d:9c:88;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; |
| Time Not Established | Critical (3) | No Ranging Response received - T3 time-out;CM-MAC=38:94:ed:9d:9c:88;CMTS-MAC=00:01:5c:7f:9a:6c;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=38:94:ed:9d:9c:88;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; |
| Time Not Established | Critical (3) | No Ranging Response received - T3 time-out;CM-MAC=38:94:ed:9d:9c:88;CMTS-MAC=00:01:5c:7f:9a:6c;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=38:94:ed:9d:9c:88;CMTS-MAC=00:00:00:00:00:00;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=38:94:ed:9d:9c:88;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; |
| 2020-01-13, 18:14:33 | Critical (3) | Telnet user logged out. |
EG
Expert
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110.1K Messages
5 years ago
The downstream power is on the low side and it may be intermittently fluctuating even lower to out of spec levels. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, and latency problems.
In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test
If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed, and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.
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