As I've said two or three times, when and since the new CEO was appointed, something is going to give. It looks as though it just did.
It's a bit hard for me to tell, because as well as the downstream being all over the place my upstream seems to have halved on tbb speed test since regaining my connection with G.INP applied. Fine on BT Wholesale test, as is the downstream. Also fine on speedtest.net.
I think the single-stream tbb protocol on the unusual port may be getting hit by the traffic management, when it used to be going through with no trouble.
Re the BT Wholesale test, I've had two or three tests today at around 55Mbps. (IP Profile 58.01 and sync 60,000). But my PN Current line speed
has been stuck at 46.6Mbps due to connections around 49Mbps when the modem firmware was out of date and couldn't handle the G.INP.
So how did I get high speeds on the BT Test, 10Mbps greater than my Current line speed? It has to be by-passing that limiter, so what else does it bypass?
/me smells a rat.