I typically get download in high 30Mbps (router reports 40, speed test 38) and ping of a very consistent 13-15ms. I run a continuous ping due to ongoing issues and several times a day, we get poor performance characterised by the speed dropping and the ping jumping up to 500ms.
Typically this might last 30s, but often we get into a period where it bounces from 15ms to 500 for half an hour - every time it seems normal again, a minute later it's bad. I do a lot of remote desktop work so ping is very noticeable.
We've not been able to get anywhere with support beyond replacing the router (the new v2 one) and factory resetting. A physical fault on our line was fixed recently but that had totally different symptoms - this has been going for a few months now. My suspicion is it's on the server end not the connection but I don't know how to prove that. PN say they can't see anything and since it's so intermittent it relies on me recording data. Other than running ping are there other things I can test and record to either help see what's wrong, or provide to PN to help them?
ps: when I run a continuous ping I've checked it's not the specific website... sometimes I use google or BBC, right now I used my naked primary DNS IP... exact same results during a bad patch.
