ppp multi provider

[Lawrence Nahum <lawrence.uni@gmail.com>]

Hi all,

I have a computer with a two 56k serial modem that serve internet  
connectivity to my lan.
I have different providers (ISP) and I sometimes I need both  
connections UP.
Is the first time i use ppp on linux, i've checked some howto and  
yes, i'm a little confused.
pon, poff, chat,  and the two type of authentication available (CHAP  
and PAP)..

I need to do all via a non interactive way since the all  
configuration need to be managed by an application on the webserver  
and i wonder what is the best way.
I have all the ISP data (phone number, user, password) given via  
webinterface and I need to generate the configuration on the fly.

Thanks for any answer.

Lawrence