TNC that divides the steam of data in to manageable packets. Its version 9. This site contains Mac software; APRS Database Access There is a web page that will show the latest weather reports for the weather stations nearest a location. This protocol allows to transport up to kbps IP trafic over 70cm amateur radio links, in a point-to-multipoint topology. Until recently, HF Packet-Radio had been more or less overlooked by the sound card developers.