I use ExpressTalk with Linux under Wine, all is ok, it is ringing, I have outgoing sound, but no incomming sound. I forwardet the ports on my router, but still no incomming sound.
On windows xp it works now with outgoing and incomming sound, I have the same configurations on Linux on expresstalk and router, cause it is the same laptop but just no incomming sound. I tried it with all configurations i could think of, nothing helps.