Orbi WiFi 7 RBE973
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C7100V SYNC Timing Synchronization failure

SuperChief05
Follower

C7100V SYNC Timing Synchronization failure

My cable modem resets back to factory at least daily, if not more often. I pulled this code from the event log:  

SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=08:36:c9:d0:ca:60;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;

Going through the community it appears that this might be a ISP (Xfinity) problem.

Firmware is 2.01.42.

Thanks in advance

Model: C7100V|Nighthawk AC1900 WiFi Cable Modem Router
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plemans
Guru

Re: C7100V SYNC Timing Synchronization failure

do you have a screen shot of the cable connects page and the complete logs? 

One single log entry isn't enough to determine its a isp issue. 

Also, if you have any splitters, amplifiers, or attenuators in line, I'd remove them. Check the cable for damage, cheap/bad connectors, loose connectors, kinks in the line, replace them.

I usually advise moving the modem right to where the coax enters the home to prevent it from being wiring within the home. 

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