> It won't take a genious with LLU to offer 24Mbit SDSL
> for 40 quid a month by having a pair of lines
> to connect ADSL both ways. Or even just offer a proper
> SDSL 24mbit modem over two pairs of wires.
That's not legally possible in the UK.
Every operator using BT lines is required to adhere to a specification
called the Access Network Frequency Plan ("ANFP") which details the
technical limitations on the xDSL technologies and bandwidths possible
over copper pairs.
These specifications are important to avoid interference between lines.
They limit SDSL to 2.3 Mbps, and they also specifically prohibit running
ADSL the "wrong way" around.
There is due to be a new version published soon, but AFAIK it will still
not permit SDSL speeds above 2.3 Mbps.
Go read the current version at
http://www.nicc.org.uk/nicc-public/P...s/anfps_i2.pdf.
Ray