Siphon will ultimately be a Software Voice-Over-IP phone using the SIP protocol. It will support quicknet cards as well as traditionnal soundcards. It is developped for Linux (gtk) and the win32 platform.
This project is intended for users who want to get more out of the voice modem they may have. Why another project for modem? Looking for the good quality software for the voice communication trough the modem, I could find only Win32 based. Linux now :)