On Sun, Mar 02, 2008 at 05:09:42PM +0100, Julien Claassen wrote:
  Hi everyone!
   I'm looking for a tool to do something like internet-telephony. My needs and
 prerequisits:
 * compatible with windows and Linux
 * Linux Command-line (or textmode client)
 * Best to work with JACK or at least ALSA
 * Something tha work nicely with a 2mBit line
   can anyone suggest something?
   Kindest regards
          Julien 
hi Julien,
you could try pjsua (see 
http://www.pjsip.org), it's a simple
command-line SIP client. I've installed it but never used it
because i couldn't find enough time to get a SIP account, to
configure it and to set it up... So don't know to which exctent it
is actually usable. People around me seem to use it successfully
though.
tschuss,
-- Alexandre