the reduction in line length can't be the only reason for the faster speed, I know people right next to the exchange on ADSL and depending on who they are with can get between 12 and 23Mbp/s, so it must also be due different technology as well.
Yes & No!
On face value, any reduction in Line Length will improve ADSL.
However, not all connections are the same!
Some of the possible considerations:-
1) Depends on Line Length, NOT geographical proximity to the Exchange (cable could be routed all over the place before it gets to the Premises)
Tell me about it, that is why ADSl is pretty poor where i live, not so much the distance from the exchange, but because Bt could not be bothered to re-route the cable when they moved the exchange, so the cable from here goes to where the old exchange was and then doubles back to the new exchange.
2) Number of joints & quality of the joints (particularly if old cable) in the cable
that is another problem we have here, a lot of the cables under the road are old and the ones going from the pole to the buildings are not that much better.
Mine was suppose to have been replaced around 15 years back and nothing was done, bloated toad, takes as much money as they can on line rental and do nothing with it apart from paying their shareholders and CEO Wages.
3) Any possibility all or part of the cable is routed through Aluminium, rather than Copper.
i don't we got that problem, but you never know, if they have to replace a cable they may use aluminium to save money
4) Any possible external interference to the external cable.
Christmas lights from some nit across the road who wants to light up the street
5) Then we start listing any issues that maybe creating issues within the actual User's Premises!
Mine was ok as far as I could tell, not sure about the join by the front door mind you, I had a look in there once and was shocked at the mess. i could do a better at wiring than that. I suppose it was done before the days of broadband, maybe before the days of the internet itself
With respect to FTTC, I don't have specific knowledge but my understanding is that the local copper connection (i.e. from the Cabinet to the Home) is operated using VDSL Technology, which can provide the much faster speeds, than ADSL, but it clearly can only operate over relatively short distances (hence the Fibre Part of the circuit to get to the Cabinet).
Much faster? depends on your circumstances, you could be closer to the exchange than you are to the cabinet, so your ADSl could be almost as good as FTTC.
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