I'm on FTTC 80/20. Their control pages (which are excellent BTW) tell me the VDSL sync speed is currently 72.7Mb/s. They allow you to set an FQ/shaper upstrea

I'm on FTTC 80/20. Their control pages (which are excellent BTW) tell me the VDSL sync speed is currently 72.7Mb/s. They allow you to set an FQ/shaper upstream of the DSL infrastructure. I have the shaper set to 95% of the sync speed. This means I'm trading off 5% of the capacity, but in return I never see any queuing delays in the BT infrastructure. For example, I just ran a ping from my home to my lab across London. With an idle link, I get 10ms RTT. Then I ran a DSL speed test and saturated the downlink. It reports 65 Mbps which is pretty much what I get 24/7. But the real story is that the ping briefly only increased to 30ms just when the speed test started, then dropped back to 11ms for the duration of the speed test. That's really good isolation. Bandwidth is really not a big deal anymore - what matters is latency, but most ISPs just don't get this. Often you need to buy stupid link speeds just to avoid queuing delays. But I find that FTTC is fine for everyone in my family to run simultaneous Netflix sessions and me to videoconference at the same time with no noticable additional latency on my call. Edit: here's the graphs from the A&A control page for my line for the last week. These are really helpful figuring out what's going on if anything is strange. You can see that the mean RTT doesn't really move off the bottom axis, and the peak RTT pretty much never exceeds 50ms. http://nrg.cs.ucl.ac.uk/mjh/tmp/latency.png http://nrg.cs.ucl.ac.uk/mjh/tmp/latency.png