EchoLink® software allows licensed Amateur Radio stations to communicate with one another over the Internet, using voice-over-IP (VoIP) technology. The program allows worldwide connections to be made between stations, or from computer to station, greatly enhancing Amateur Radio's communications capabilities. There are more than 200,000 validated users worldwide — in 162 of the world's 193 nations — with about 4,000 online at any given time.
The program runs on Microsoft Windows®. It is offered free of charge and may be downloaded here .
For more information about VoIP programs such as EchoLink, see QST for February, 2003, page 44, or download the PDF from the ARRL Web site.