Con Wassilieff ZL2AFP has developed a sentence-mode radio chat system that works like phone texting!
This is a computer program for Amateur Radio transmission and reception using a computer and radio transceiver. The program equips your computer with a one sentence at a time chat-mode for operation on the HF bands. You use it in the same way as you would Skype™ or cell-phone TXTing. This facilitates rapid-fire QSOs and especially makes nets easier.
As usual, sound card techniques are used to generate transmissions using tones at audio frequency, and to receive and decode the incoming signals, also at audio frequency. An SSB transceiver translates these signals to and from the HF Amateur Bands.
The EXChat mode is a development of DominoEX, and is completely compatible with other DominoEX versions. In fact operators without EXChat, but who have another version of DominoEX, can take part in a QSO, if in a slightly clumsy manner. What is different about EXChat is that it operates in Sentence Mode.
Read more about EXChat and download - http://www.qsl.net/zl1bpu/MFSK/EXChat.htm