Thats what I mean't....
Basically, LLU system is basically a 'internet' type backbone... each exchange has a data link thus creating a network...
in the exchanges themselves, voice is converted to digital and 'carried' over the digital network...
ADSL2 is provided simply by routing the adsl data down the network backbone and out through a gateway onto the internet...
Other services suct as TV etc can be digitised and sent over the cable...
Basically, the system is one step away from a 'provider' giving you a digital connection to your house and you do what you want with it...
the whole backbone for the LLU system runs on the same principal to the internet and TCP/IP... for all we know, their backbone actually uses TCP/IP transport format....