A Java Modem to send data over the voice channel of a Cell Phone. This is just experimental code. I'm interested in playing with the modem. Not the crypto, and other layers.
The JackPair pulse modem version is a newer. The translation to Java was pretty straight forward. None of the 32-bit based design was necessary, so I used integers and bytes. Indexes were used instead of pointers.
See:
http://torfone.org/pairphone/index.html
http://torfone.org/jackpair/index.html