The Natural Philosopher wrote:

There are not.

It's entirely - in the limit - down to the length of wire to the exchange.


make it shorter, make it fibre, or replace with microwave link, and you
can get more speed.


All of those cost more money than you are willing to pay.

I didn't get asked when they chose to use aluminium instead of copper to
our local exchange. The cost of _replacing_ it is high; the cost of
doing it right in the first place would not have been.

Andy