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Re: CAX30 Timing Synchronization failure - Loss of Sync
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CAX30 Timing Synchronization failure - Loss of Sync
I have a Nighhawk AX6 CAX30 AC2700 router that is dropping connection.
I have read through all the canned responses for this issue.
I have Firmware Version V1.4.10.8
There is no splitter
There is no amplifier
The coax is brand new from the node
I am on Comcast/XFinity. Xfinity has been out 3 or 4 times because i keep complaining. They have done all they can do with the line. They gave me an xfi modem and set up a monitor. The week that it was active there was not a single event of dropping the connection.
On 12/15 I spent time on a call with Netgear support on which we performed the following:
Disconnect all but power connection
Press and hold reset button for 30 seconds
Remove poer connection
Press and hold reset button for 30 seconds
Reconnect power
Press and hold reset button for 30 seconds.
The modem worked fine for 3 days and now is back to dropping connection
A review of the logs shows this:
2021-12-19 13:05:52 | Notice (6) | DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=6c:cd:d6:80:fb:a4;CMTS-MAC=00:01:5c:92:1a:66;CM-QOS=1.1;CM-VER=3.1; |
1970-01-01 00:00:35 | Notice (6) | Honoring MDD; IP provisioning mode = IPv6 |
1970-01-01 00:00:30 | Critical (3) | No Ranging Response received - T3 time-out;CM-MAC=6c:cd:d6:80:fb:a4;CMTS-MAC=00:01:5c:92:1a:66;CM-QOS=1.1;CM-VER=3.1; |
1970-01-01 00:00:24 | Critical (3) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=6c:cd:d6:80:fb:a4;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; |
2021-12-19 12:20:14 | Critical (3) | No Ranging Response received - T3 time-out;CM-MAC=6c:cd:d6:80:fb:a4;CMTS-MAC=00:01:5c:92:1a:66;CM-QOS=1.1;CM-VER=3.1; |
2021-12-19 12:20:06 | Critical (3) | SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=6c:cd:d6:80:fb:a4;CMTS-MAC=00:01:5c:92:1a:66;CM-QOS=1.1;CM-VER=3.1; |
The cable connection info is this:
Cancel Apply | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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It is rather frustrating that such a high-end router is actually not as good as I was lead to believe by the reviews and ratings.
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Re: CAX30 Timing Synchronization failure - Loss of Sync
Try a different CAX modem? If all as been checked and tried, possible faulty unit is all.
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Re: CAX30 Timing Synchronization failure - Loss of Sync
Still dropping with sync errors. Is this normal at all? Is there any reason that I should need to reboot the modem periodically? With my ATT modem (previous house) i never had to reboot. The XFinity modem does not crash either. I don't want to use it or pay the extra $$ to do so, and it has less wifi range than the Netgear CAX30
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Re: CAX30 Timing Synchronization failure - Loss of Sync
So after a lengthy chat with netgear support, they have told me that my downstream power is too weak. They told me that it is supposed to be between -7 dBmV and +7 dBmV. Mine is running between 4 and 5 dBmV (see above info).
If I am at +4 or +5 dBmV, how is that too weak when the recommended band is MINUS 7 to PLUS 7 dBmV? It must have been a language thing because "Sharon" and "Fatima" told me it is too weak at PLUS 4.
They quoted me this FAQ: https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router
"Good Downstream power levels are within -7 to +7 dBmV."
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Re: CAX30 Timing Synchronization failure - Loss of Sync
Yes.
Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
Be sure there are no coax cable line splitters in the between the modem and ISP service box.
Be sure your using good quality RG6 coax cable up to the modem.
Your modem should not need a reboot or power cycle to correct anything unless your troubleshooting something.
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Re: CAX30 Timing Synchronization failure - Loss of Sync
Hopefully they will release a new firmware that will fix but I don’t think with in a day.
Return/ replacement or wait for it
Good luck
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Re: CAX30 Timing Synchronization failure - Loss of Sync
Maybe applies to your experiences, however the OP has stated different experiences.
Thanks.
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Re: CAX30 Timing Synchronization failure - Loss of Sync
please stop hijacking my thread with a problem that is not the same issue
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