IRLP

• What is IRLP?
• Central ND IRLP Hotlink
• Using IRLP
  • Rules of Operation
  • Connecting
  • Disconnecting
• Central ND Hotlink Features
• ND IRLP Station Nodes
• IRLP Reflectors
• Need Help?
• Would You Like To Know More?

What is IRLP?

The Internet Radio Linking Project, also called IRLP, is a closed-source project that links amateur radio stations around the world by using Voice over IP (VoIP). Each gateway consists of a dedicated computer running custom software that is connected to both a radio and the Internet. This arrangement forms what is known as an IRLP Node. Since all end users communicate using a radio as opposed to using a computer directly, IRLP has adopted the motto “Keeping the Radio in Amateur Radio”.¹

IRLP users are able to communicate worldwide using their VHF/UHF radios though simplex or repeater based station nodes. These nodes can be connected to one other station (i.e. single connection) node or to a reflector node (e.g. a party-line node).

The first IRLP nodes were installed in British Columbia during November of 1998.

The IRLP website is http://irlp.net/

Central ND IRLP Hotlink

The Central ND IRLP Hotlink is a group of repeater nodes which are configured to automatically maintain their connections to IRLP Reflector channel 9366.

These nodes may be manually connected to other another node/reflector. They will automatically reconnect to IRLP Reflector channel 9366 following the receipt of a disconnect command breaking the connection to a remote node/reflector or after a period of inactivity.

Nodes

These repeaters all require a CTCSS (aka “PL”) tone, and provide CTCSS squelch (aka reverse tone), of 123.0.

• Carrington (#3698)
• Devils Lake (#3317)
• Maddock (#3391)

Using IRLP

Rules of Operation

IRLP users should review the IRLP Operating Guideline page before beginning to use the system.

The most important guideline to remember is leaving a pause after pressing the PTT button as well as between transmissions.

Connecting

1. Listen for a reasonable amount of time to see if the node is in use
2. Identify and announce your intent
3. Enter DTMF 73 to ensure the node is disconnected
4. Listen for a response
5. Enter the four digit code (as DTMF) for the node or reflector you wish to connect to
6. Listen for a connect or busy message
7. Disconnect the node at the end of your communication

Disconnecting

1. Identify and announce your intent
2. Enter DTMF 73 to disconnect from the remote node/reflector
3. Listen for a response

Central ND Hotlink Features

Weather Radio

These repeaters are equipped to receive NOAA Weather Radio.

The weather radio receivers are automatically activated (for 3 minutes) by NOAA weather alerts and may manually controlled using these DTMF commands:

Repeater Status Readback

Retrieve spoken repeater information with these DTMF commands:

ND IRLP Station Nodes

IRLP Reflectors

Selected reflectors of local interest.

A complete list of reflectors is available on the IRLP status page.

Need Help?

Please contact for assistance with IRLP.

Would You Like To Know More?

• Visit the IRLP website
• Read the IRLP Wikipedia Article
• Read the Another Canadian Invention is Sweeping the World article at eHam.net
• Find more references on the IRLP In The News page
• Read the stories and testimonials on the IRLP Stories page