I know the logistics.. your computer connects to the net, you speak into the microphone. the signal is converted into data, which is sent over the net just like all other data. it then goes to a server which is connected to the normal Telephone network. the server then translates that data into audio, and phones the person you are trying to reach.
first of all, are there any services like that that are free?
are there any at all? which is the best overall?
does it require special equipment (full duplex modem?). any info would be appreciated.
