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Forum Discussion
c7000 dropping wifi
My modem/router is frequently unable to get internet/wifi signal to random things in the house. Sometimes its my computer, other times fire TV, etc. This is happening more frequently than ever. Usual...
do you have a screen snip of the cable connections page and the logs?
That lets us check the signal from the isp.
Have you noticed if its mainly device on 2.4gh? 5ghz? wired devices?
I notice the 5ghz signal only becauase my smart TVs are on it. My computer is also usually on 5ghz which I notice the most.
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Time Priority Description 2020-12-2, 03:09:13 Warning (5) Dynamic Range Window violation 2020-12-2, 03:09:12 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:cc:fc:61:de:b1;CM-QOS=1.1;CM-VER=3.0; 2020-12-1, 23:08:43 Warning (5) Dynamic Range Window violation 1970-1-1, 00:00:50 Notice (6) Honoring MDD; IP provisioning mode = IPv6 1970-1-1, 00:00:40 Notice (6) WiFi Interface [wl1] set to Channel 153 (Side-Band Channel:N/A) - Reason:INIT 1970-1-1, 00:00:40 Notice (6) WiFi Interface [wl0] set to Channel 11 (Side-Band Channel:N/A) - Reason:INIT 1970-1-1, 00:00:39 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 2020-11-29, 10:31:15 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:cc:fc:61:de:b1;CM-QOS=1.1;CM-VER=3.0; 1970-1-1, 00:21:47 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:21:43 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:21:43 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:21:35 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:21:34 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:21:28 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:21:13 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:21:12 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:21:04 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:21:02 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:18:56 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:18:53 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:18:35 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:18:33 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:16:27 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:16:27 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:16:26 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:16:24 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:16:04 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:16:02 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:13:55 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:13:55 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:13:55 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:13:53 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:13:33 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:13:31 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:11:26 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:11:24 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:11:04 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:11:02 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:08:55 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:08:55 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=44:a5:6e:01:03:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; Your power levels from the cable connections page looks spot on. But your getting power violations on the logs ant t3/t4 errors with sync errors. They tend to indicate line issues. Might be worth having the isp checking the line.
I'd also check to see if you have any splitters, amplifiers, or attenautors in line and remove them.
How frequently is it happening?
A reboot is the only thing that fixes it?
Do hardwired devices have issues when its happening?