NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
CM1200 Dropping connection intermittently - SYNC Timing Synchronization failure
Bought the CM1200 about a month ago and since it was setup by RCN(isp) I have had it seemingly randomly dropping internet connection. When it drops connection the downstream light will be blinking an...
Please post a copy and paste of the modems connection status page.
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.
Be sure to disable LAG on the modem.
I have attached screenshots(can only attach one per post it appears will attach the second screenshot in the following message) of the connection page when the internet was disconnected. The technician that came out tested the signal and line up to the modem and determined it was fine. The ISP has reprovisioned the modem twice with no issues either time. There are no splitters in use and I have tried multiple coax cables to no avail. Ethernet port aggregation is disabled. I did try enabling Enable Extended Upstream Transmit Power to fix the issue, but that did not work.
