What Is Echolink
Echolink software allows licensed Amateur Radio stations to communicate with one another over the Internet, using voice-over-IP (VoIP) technology. Echolink is a software program designed by Jonathan Taylor, K1RFD, that allows licensed Amateur Radio operators to communicate all over the world. You can access Echolink either with a radio or a computer, and also provides direct access to distant repeaters.
In order to use the 2E0VAJ-L EchoLink system all you need is a 70cm radio with a DTMF pad take a look at 2E0VAJ-L to see what you have to do.
What do I need to use EchoLink?
There are several different ways you can use the EchoLink. You can set up a simplex link, with a VHF or UHF transceiver connected to your PC, to allow anyone in range of your station to communicate by voice with any other EchoLink station around the world. Or you can use the PC's microphone and speakers and remotely connect to any of more than 2,000 different repeaters that have EchoLink capability.
If your thinking of setting up "Simplex Link" then you will need permission off Ofcom this can be done by going to http://www.dcc.rsgb.org, you will need to fill out an online form with all your details, then this is sent to Ofcom for approval. Then you will need an interface, which goes between your computer running echolink and your radio. The interface which i would go for is a OPTOIF MK3 made by DAVID DESOUZA-KIRBY G3VFP from Pcinterfaces.co.uk who kindly sold me an interface with cables etc. Since then, it has performed flawlessly and done everything I want this little box of tricks to do ! Modestly priced and made from very high quality materials, it has been an excellent buy. The pre delivery and after sales service from David is just superb and if you are looking for a telemetry modem or an interface with true optical isolation for amateur radio or even professional data use, David can supply. I found the instructions simple to follow and the coupling together of the interface to rig extremely easy. Everything worked first time and has never let me down.