Hi,

I have got the telephone company looking at this as well but thought I'd throw it out to the community to see if you have any insight.  Vigor 2865 (fw 4.5.2.1_BT) and a newish VDSL2 line that I've just put into production, the router has 2 WAN links (both VDSL2), WAN 2 is via a Vigor 167 and WAN 1 connected to the DSL port on the router, WAN 1 is the problem child, stats look good, SNR is around 11Db, it's syncing at the max rate for the line. The only really odd thing is UAS number is 1145213 (13+ days) which considering the router was rebooted a couple of days ago seems odd - probably a red herring though.  The WAN1 is fine during normal use but when I start the cloud backups in the evening the line disconnects, it's only ever down for a few seconds, just enough to trigger the notification email I have setup.  It might disconnect half a dozen times in a 10 minute period then it calms down again.  Once the traffic dies down again the line becomes "stable" again.  The telephone company have done some initial tests and they sent me a screenshot of the BTWS RAG status and that all looks good, bit of a head scratcher.

Any thoughts, I am thinking maybe tweaking the SNR a bit to see if that helps?

Cheers
Rob