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Mankato Area Radio Club (MARC) - IRLP Operation

Welcome to the official web site of the Mankato Area Radio Club. Originally founded in Mankato, Minnesota on 1954, we have been working to encourage the growth of Amateur Radio for 57 years.

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Node Guidelines

To call a Node or reflector

Please listen for 30 seconds to see if the node is already in use.

Put out a call asking if anyone is using the IRLP and then wait 30 seconds for a response.

Following this, state your call-sign and announce the node number you wish to call. E.g. This is w0test calling node 1234 on the IRLP. Immediately after announcing this, dial the node number you wish to call.

To connect to a Node or reflector, Dial the Node Number with your DTMF keypad. After connecting to a node, listen for 30 seconds to ensure you don't interrupt a QSO. Your then free to put out a call.

During a QSO, please pause 2 seconds (minimum) before keying up to allow other stations to disconnect or break in. When connected to a reflector or node, key your radio then wait one second to allow the other node/s to begin transmitting.

To Disconnect from a Node enter "73"

NOTE: You can only enter a disconnect code when the link is idle. If the operator on the other end is long-winded, you're at his mercy, until the node timeout breaks in. An 8 minute timeout has been set to drop the node if no audio is detected from this end.


There are no "access codes" for this node. It's open for everyone to use. Enjoy!

If you need a list of nodes, where they are located, what nodes are connect to each other, what are the frequencies of other nodes, etc. go to

What is a Node?

A Node refers to a computer that is either connected to a repeater or runs on a simplex basis. Nodes can be connected to each other in 2 different ways. The first way is Node to Node, and the 2nd is via a reflector. Node to Node is virtually 2 linked repeaters located anywhere in the world on the IRLP system.

What is a reflector?

A reflector is a computer allowing multiple nodes to connect simultaneously. e.g. If I was talking to node 6220 and we both needed to talk to node 6000, we could all dial in to a reflector and be all connected simultaneously. More than 20 nodes can connect to a reflector simultaneously.

The reflectors have 10 "channels" each. You can access these different channels by dialing the three-digit reflector number, plus a channel number from 0 to 9. For example, channel 3 on Reflector 925 would be "9253". The most commonly used channel on a reflector is channel 0.

Two of these new channels, 8 and 9, have a special purpose. They use a special audio encoding method so that nodes on dial-up connections can now use the reflectors. This means very little to us locally, except that if you want to talk with a group on a reflector that includes a dial up node you'll have to be on channel 8 or 9. However, if you're making a direct connection to a dial-up node there is no difference.

Node Timeout

The timeout for reflectors has been set to 8 minutes. e.g. If no one transmits locally for 8minutes the reflector will disconnect. The timeout for Node to Node QSOs has been set to 8 minutes. e.g. If no one transmits locally for 8 minutes the node will disconnect.

Node Information and Short Operating Guidelines