IRLP

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/

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
Weather Radio

These repeaters are equipped to receive NOAA Weather Radio.

LocationNOAA Station
CarringtonJamestown WXL81
MaddockSheyenne KWN46
Devils LakeWebster WWG25
MinotMinot WXL83

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

CommandAction
98Activates the weather radio receiver for 3 minutes
93Disables the weather radio receiver
Repeater Status Readback

Retrieve spoken repeater information with these DTMF commands:

CommandReply
*8Current time
*3Current date
411Repeater connection
611Time

ND IRLP Station Nodes

LocationIDFrequencyNode # and connection
CarringtonK0BND146.67- T1237805 -> R9100
CarringtonND0B146.57- T1233698 -> R9366 (auto)
Devils LakeWD0FFQ146.99- T1233117 -> R9366 (auto)
FargoK0EED145.49- T82.54549 -> R9366 (manual)
MaddockKF0HR147.24+ T1233391 -> R9366 (auto)
MinotK0AJW146.97- T673906 IDLE

IRLP Reflectors

Selected reflectors of local interest.

ChannelNameNotes
9366ND Hotlink
9367ND ReflectorMinot net 7pm Sunday evenings
9100WIN SystemConnects 70+ repeaters in California and world-side; very un-hamradio culture. NSFW
9109The Alaska NetAt noon (Alaska time)
9070Another Alaska Net
9050East Coast ReflectorTuesday night technical net
9732Cross Roads ReflectorSD & ND EMCOMM

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?


  1. “Internet Radio Linking Project”, Wikipedia, Retrieved May 23 2019, https://en.wikipedia.org/wiki/Internet_Radio_Linking_Project. [return]