> I have not verified that, but from what I have heard, that is what 
> some companies use for ADSL connections here in Austria.

If I understood PPTP correctly you need an underlying working internet
connection for it to work at all. So I don't see how PPTP alone (without
PPoE below it) could work with a cable modem. Of course you could do
PPoE and run PPTP on top of that (but *why* you should do that as an ISP
I have no idea). Is PPTP able to run on an ATM transport directly?


Martin