/etc/networking/interfaces
As a full Debian/Ubuntu nerd, I use "/etc/networking/interfaces" to setup my network. But as far as I have Two different modems to connect with, I wondered how to make them work with "/etc/networking/interfaces". I found.
ppp
To connect with "ppp", I type "pon bluenet". To use "/etc/networking/interfaces" with it:
iface ppp0 inet ppp provider bluenet
wvdial
To connect with wvdial, I type "wvdial orange". To use "/etc/networking/interfaces" with it:
iface ppp0 inet wvdial provider orange