looking at
Firstly, don't modems just convert digital to analogue and vice versa, and dial numbers. They would just provide the connection, withot knowing about PPP's username, and passord. So 'd have thought that all modems 'support ppp' as they should any computer protocol since it's just a digital signal.
Secondly,how can you have PPPoE i.e. PPP over ethernet, on a non-ethernet modem?