IRLP

Our IRLP node is 4282 on our 146.880 repeater.

Details, procedures, and statuses are available at the IRLP website.

You Must Identify!

When using IRLP or any other repeater function you absolutely must identify before sending DTMF.  It it recommended that you ID by saying: "this is [your call] accessing IRLP" and send your tones in the same transmission.  Recently stations have been keying up, sending DTMF digits to establish a link, and leaving the repeater idle.  This is unacceptable activity in the eyes of the Trustees, the IRLP community, etc.

After you connect to another station you should wait 2-3 seconds, identify again, and either call another station directly or indicate who you are and that you're looking to make a contact.  Blindly bringing up a remote node and not identifying yourself after the node connection is established is poor etiquette.

You must identify or control operators will shut down your IRLP connection and/or disable IRLP entirely.

Abandoning

If you establish a connection to a remote node and you are going to leave, stop monitoring, or otherwise walk away it is your obligation to terminate the node connection with a "73" DTMF string.

If other local users have joined you advise them to "shut down the node with 73" when they're finished as you're leaving.  Lately some users have connected to reflectors (stations used to multiplex multiple repeaters together, and whose node ID begins with a 9xxx) and abandoned the connection.  Some reflectors and stand alone nodes are intentionally configured to never time out, and other 146.880 users unwittingly start local QSOs not realizing they're broadcasting their discussion in 3-35 different repeaters across the world.

Idle Connections

  • If you're going to connect the 88 machine to an IRLP Reflector "Net" and you intend to monitor for an extended period of time please be reasonable.  If the machine is going to be completely quiet for more than 15 minutes it will be presumed abandoned, and other local users may hut down your connection to use the repeater locally.
  • If a remote "net" is going on and you're engaged in that net it's encouraged that you transmit when appropriate and, since local stations may not realize you're local to 88, consider stating that you're in Cleveland or via node 4282 so that others monitoring 146.880 realize you're the active local IRLP user.

IRLP by design should automatically shut down SOME connections when certain timeout values are met, but if the remote node is configured to not time out (as many reflectors are configured) then it is up to local users to shut down our connection.  If you establish a connection that burden rests on you to perform or relay to other local users.

FAQ

by Ron Jakubowski, K2RJ

Just what is IRLP?

IRLP, which stands for Internet Radio Linking Protocol, is a system that links radios and repeaters together with an internet connection.  This same type linking has been done via UHF radio and telephone wire for decades, but only at a local, or maybe a state level.  Now, via the internet, we can link 88 to any IRLP enabled system in the world.

I want to talk to my brother, W7XYZ in Tucson, AZ.  How do I do that?

Well, first of all, he must be able to get into one of the systems in Tucson.  There is a listing of current IRLP systems on http://www.irlp.net/.  There are 4 nodes, 3300 on 146.70, 3892 on 146.94, 3924 on 147.30 and 3033 on 224.74.  You would make a sked with him to be on one of these repeaters and, at the appointed time, dial that node up on 88 (see above for IRLP etiquette) and give him a call.  Or, from his end, he could dial up 88 using our node number 4282 and call you.

Could I just dial-up one of those Tucson nodes and give him a call without making a sked?

Sure!  You could take pot-luck and maybe he or someone who knows him might be listening and try to find him for you.

Could I use IRLP to make an autopatch call to him on one of the Tucson repeaters?

No, IRLP is designed to transport voice only.  All DTMF tones are intercepted by the computer interface and not allowed to pass over the internet connection.  Even repeater supervisory tones, ID's and voice messages are kept from going over the IRLP system.

So, if I'm travelling somewhere and have my handheld or mobile with me and want to get back into the LEARA 88 repeater, I can do it from any system listed in the directory on http://www.irlp.net/?

Yes, its just about as simple as that!  But my experience has shown that not all the systems listed are active or accessible when you want to use them.  Also, the node might be turned off at this end for a net or due to a "bozo" problem.

I noticed that some of the listings are simplex frequencies, not repeaters.  Is that correct?

Yes, I ran into that on my vacation in Florida!  An IRLP radio system need not be a repeater.  Some are just base stations.  The only drawback is that other stations may hear the base station but don't hear your signal and could transmit over you if they were not aware that the system was in use.  It's always a good idea to listen on the frequency for a period of time before accessing a simplex node!