[aprssig] AVRS Online

Lynn W. Deffenbaugh (Mr) ldeffenb at homeside.to
Sat Jan 15 00:08:40 EST 2011

I mentioned before wondering what happens if I specify an -SSID to 
contact, so from KJ4ERJ-AP I sent "KJ4ERJ-12".  Here's what I got:

00:05:56> KJ4ERJ-12 (*2-00:05:56)
00:05:56< VOICE CALL from KJ4ERJ-AP, PSE QSY 444.700MHz T77.00
        < CALL KJ4ERJ-AP on 444.700MHz T77.00 IRLP node 4853

Yep, I'm supposed to call myself on echolink.  But that pointed out a 
question, why does the "VOICE CALL" not include the indication of 
network (IRLP) or node (4853), but the "CALL" message does?

BTW, I've looked at AVRS's messages at 
http://aprs.fi/?c=message&call=AVRS&limit=50 and it appears that ? isn't 
being answered for anyone?

Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32

John Gorkos wrote:
> The AVRS responder described at http://aprs.org/avrs.html is online and 
> running, and all code is current in the SourceForge project.  I'll be adding 
> usage information this weekend on the SourceForge page, but the bottom line is 
> pretty easy:
> Message "?" to "AVRS" to get a message with the closest EchoLink OR IRLP node 
> sent back to you, as well as two objects sent to the APRS-IS stream 
> representing the two closest nodes.
> Message CALLSIGN to "AVRS" to initiate a voice-over-Internet link to a distant 
> station.  AVRS will find the best path (EchoLink or IRLP) and send two 
> messages:  one to your target, asking them to QSY to the appropriate frequency 
> and stand by for a QSO with you, and the second message to you telling you to 
> QSY to your closest node and the node number of the distant node you need to 
> bring up.  
> Please give it a try, and email me with any issues or problems.  Right now, 
> the node selection algo uses a "shortest total path" to determine the best 
> node, and doesn't differentiate between nodes based on frequency (i.e. if you 
> ask on the 2m APRS frequency, you may get a 440 node in response).  Total path 
> length is based on distance from you to the closest node plus the distance 
> from your target to his closest node.  
> Target callsign does not need an SSID.  For targets with multiple SSIDs, right 
> now I'm just grabbing the station with the most recent transmission.   I'm 
> working on an algorithm to make the selection based on SSID, stations that are 
> moving, stations that have a history of RF messages, stations that indicate 
> message-capable based on = or @ in their positions, etc.
> I'm also working on the item-in-message format.  Should have that at the end 
> of the weekend, depending on my football-watching schedule and how exiting the 
> games are.
> Again, the source code for all parsers and AVRS logic is at 
> http://sourceforge.net/projects/avrs/
> Since I've never really used EchoLink or IRLP, and don't have any friends 
> anywhere else in the world, I'm a little stymied to actually test this.  
> Please help me.
> de AB0OO
> John Gorkos
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