Having problems with connection dropping,there no set pattern,might go a few days without issues, then you might get numerous disconnections in a day, it been as many as 9 times in one day,this has sometimes been consecutive days.
Since December 4th until 4th February had 34 disconnections,missing data from December 13th until January 15th,accidently got deleted,so missing a lot of other disconnections.
My current ISP can't do anything,as the fault is intermitten, had quite a few engineers out, some find a fault,others can't.
Numerous engineers were going to escalate the matter, nothing happens,a couple even suggested a new footway box & a running a new cable to my pole,thus eliminating the short section of cable where the fault is always found.
Back in 2019 they actually cut through the cable where it currently goes from the pole to the hole in wall to footway box on other side.
Feb 7 14:11:22 syslog: [1664224.245000] Line 0: VDSL2 link down
Feb 7 14:11:24 syslog: Clear IP addresses. IP connection DOWN.
Feb 7 14:11:24 syslog: [1664225.829000] Line 0: xDSL G.994 training
Feb 7 14:11:39 syslog: [1664240.837000] Line 0: VDSL G.993 started
Feb 7 14:11:54 syslog: [1664255.689000] Line 0: VDSL2 link up, Bearer 0, us=19144, ds=79956
Feb 7 14:11:54 syslog: [1664255.694000] Line 0: VDSL2 link up, Bearer 1, us=0, ds=0
as you do not appear to be a BT retail customer there is nothing this BT Retail customer forum can help you with. There is no link from here to openreach anymore than there is from your current ISP