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Echolink

Echolink. Author: John Noden – G8IOK January 2008. What is it?. Network of computer terminals (via the Internet), repeaters and stations Over the air it uses standard voice plus DTMF (phone) tones to control the repeaters. On the Internet it uses ‘voice over IP’ (VOIP). Terminal to Terminal.

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Echolink

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  1. Echolink Author: John Noden – G8IOK January 2008

  2. What is it? • Network of computer terminals (via the Internet), repeaters and stations • Over the air it uses standard voice plus DTMF (phone) tones to control the repeaters. • On the Internet it uses ‘voice over IP’ (VOIP)

  3. Terminal to Terminal • This uses VOIP just like Skype • Unlike Skype it can only be used licensed Radio Amateurs • Although long range communication is possible I do not consider it DX as there is no skill in it

  4. Terminal to repeater/station • This is Amateur Radio because one leg is being transmitted • Repeaters are simplex • When the transceiver is in receive mode then the audio is repeated over the Internet to the attached terminals • In transmit the audio from a terminal is transmitted via the repeater

  5. Station to Repeater to Repeater to Station • In this mode one repeater is in receive whilst the other(s) are in transmit • The receiving repeater is being controlled by the remote station • The remote stations are listening either to the repeater input, via the remote repeater(s) or as terminals on the Internet

  6. Station to Station to Repeater • The repeater being simplex can ‘listen’ and relay a conversation that is occurring on the input side. • The two station must appreciate that the repeater does not hear two stations but just a single input so care must be taken about time-outs.

  7. Conference – Single Repeater • One or more stations to a single repeater with one or more Echolink terminal • This is what I am experimenting with for potential Club Net • Allows normal ‘on air’ net for those local to Echolink repeater • Remote users communicate via Echolink terminal

  8. Conference – Multiple Repeaters • Echolink repeaters are joined together • 2 or more repeaters • Allows larger coverage of ‘on air’ net • Those remote from all repeaters may still use Echolink terminals

  9. The Echolink Server • The Echolink server monitors the status of the repeaters and the terminals. • Logging into Echolink really means that you are logging into the server. • From here you connect to repeaters or join a net. • Networks can involve multiple repeaters

  10. Topology

  11. How do I control a repeater • From a computer • You can open up a remote repeater and call CQ. • Via a transceiver using DTMF • This will allow you to open up a remote repeater and call CQ • You can randomly select a remote repeater and call CQ from that

  12. How do I join in? • You need to register with the European Echolink repeater. • You will need to provide proof of license e.g. a PDF copy emailed to them • Once registered you will be able to converse with other users. • Don’t register as a repeater unless you intend to run one (you can always change it later if need be). • It’s free.

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