It was pointed out earlier that 200kbps seems to be the case. Well the affects in reality for me where a dam sight more than only 200kbps when set to 77.4 or a 77.44 BTW profile , it improved when set to 78mbps but still resulted in a lower throughput than what i should of had, I don't really care what part of they system was responsible,
I think you may be saying that there seem to be other throughput losses. I think you may be right, but that isn't the same thing as the hard cap that the Current line speed sets before those kick in.
It could be to do with the buffering involved in the prioritisation system. Given the overall throughput increase due to the increase in the number of customers, plus the radical change in the way people use the net in the last couple of years, it wouldn't be surprising if that side of the system wasn't creaking.
Queuing systems are complex beasties . A small slowdown in one place can cause a huge jam elsewhere, as on motorways.
Whilst the CLS may be set upto 200kbps lower than the IP profile, there is still around a minimum 2Mbps drop in throughput below that at these higher speeds. You may well find that the larger decreases are dependant on which Gateway you are on. But tommy45 can't check that now, so there's little point in arguing about it any more.
No i can't but others can,
Re gateways, the newer BNG's gave me a higher downstream throughput of around 2-300kbps when compared to the older PTN's and PTW's
Latency was around 1-2ms lower on some of BNG's ,
buffer bloat was less on the older gateways though, going by tbbqm's
But there are no two ways about it their use of a secondary profile and associated traffic management was artificially restricting the max throughput on my connection, and i suspect I'm not the only customer to suspect this,it's probably more easily spotted on connections that sync at the full rate as easier to compare results from speed tests with customers from other ISP's that supply services via BTW .
And yes BTW's IP profile also does this , but going by Sky speedest results only by around 1mbps That considered Plusnet customers with FTTC could be losing upto 3-4mbps of throughput as they are getting hit twice