Basically all I do is play this Dialtone.wav file through a phone cord and plug it into a splitter on the modem hooked up to the dreamcast.
Download Dialtone.wav here~
http://www.2shared.com/audio/z8vM2q5m/dial_tone.html
Originally I plugged the headphone jack from the computer into a stereo and wired a phone cord to the speaker output, plug the phone cord into an rj11 splitter plugged into the modem.
pc~headphone jack~ stereo receiver~ speaker output ~phone cord ~ splitter~ modem
DO THIS AT VERY LOW VOLUME FIRST.
Do not crank up the volume all the way, I do not know if this will ever damage either modem in the computer or the dreamcast but I highly doubt it, If I remember a phone line takes about 68V DC and 90V AC for rings and such, I could be wrong.
Just play the dialtone.wav file on repeat on the computer and turn up the volume just a little at a time and try it until its loud enough to trick the dreamcast, it should take about 6 seconds for games to check the dialtone and start dialing.
Unplug the wire right before you hit Answer on your setup or whatever youre doing and it should work.
Eventually I took the stereo out of this all and i just wired a phone cord right into the speaker in my iMac! its a bit tricky and
I don't recommend doing this unless you Know what you're doing!
I only play it on volume 2-3 is loud enough to trick it.
