IRLP uses Voice-Over-IP (VoIP) custom software and hardware.  Coupled with the power of the Internet, IRLP will link your repeater site or simplex station to the world in a simple and cost effective way.

IRLP operates a worldwide network of dedicated servers and nodes offering very stable worldwide voice communications between hundreds of towns and cities.  All this with unsurpassed uptimes and the full dynamic range of telephone quality audio.

The Internet Radio Linking Project was started back in November of 1997 as an attempt to use the Internet to link radio systems across Canada. The first full time link that was established ran from Vancouver, BC to Saint John, NB. The link had many problems and was shut down in March of 1998 due to the numerous computer crashes and repeater lockups it was causing, along with the lack of user control over the system.

After changes to the operating systems and interface boards between radios and computers it works remarkable well.The final product was a combination of hardware and software that created a nearly seamless radio link between two remote sites on the Internet. The product works so well that many people cannot believe that they are talking through a link at all!

The IRLP uses a Voice-Over-IP (VoIP) streaming software called Speak Freely. Speak Freely is very similar to other VoIP software packages (such as Microsoft NetMeeting and VocalTec iPhone) with one difference… It runs under Linux.

All IRLP nodes consist of a computer, an interface board, and a radio.

How do I turn a link ON/OFF?

All links are activated and de-activated by using DTMF tones received by the IRLP radio/computer.  You must contact your local node operator for access details. Go to the status page and click on node number in your area.  An email link to the node owner is provided.

To talk on IRLP.  Make sure it is an open repeater and that you are allowed to use it.

Set up the repeater or simplex frequency that has an IRLP node.  Enable the CTCSS code and usually a positive offset on your radio.

  • Press PTT and hold
    •Say your call sign
    •Press node #xxxx
    •Release PTT
    •Should hear repeater answer and voice tells you if you are connected.

To Hang up from IRLP 

  • Press PTT and hold
  • Press #73
  • Repeater should tell you, you are disconnected

To find nodes near you or around the world you can visit the website  by clicking here, , and on the left click on “Active Node Status” & then click on “List of nodes and Frequencies” you can then sort by Country at the top by clicking Nodes by Country.

Content taken from various websites and blogs.

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