I had fibre installed about 12 days ago, "BT Business with Fibre", 40/2Mb. I'm 200m from the cab so got a link of 38717Kbps at install, and DL throughput of 36-37Mbps straight away. Ping a steady 19-20 with pretty much zero jitter, any time of day. All was good, no disconnections, no data errors, no lost packets.
Not so good now though, I'm getting 23-24Mbps with a ping of 70-120, jitter of 20 or so and even an occasional lost packet! I've speedtested with both BT Speedtest and speedtest.net, wired straight to the HH, and at various times over the last 5 days from 8am to 1am. I've rebooted the modem to get a reconnect once and nothing changed.
Any ideas what's going on here? Surely "line settling" should mean result can improve a little, not drop 30%???