I've found info on IAX messages regarding types for (T)elemetry and (L)inks.
I see a text message fly by in my asterisk console of type G like this:
Received text over link: 'G 42060 1220.74N 12327.40W 123.4M'
I don't need a super long explanation, but why is this node (42060?) sending this?
Looks like location profile for the node ?
Why not ask the sender ?
sendtext is not a function of app_rpt/ASL but has been formatted for use.
We borrow the function from asterisk.
Your node number is just an extension. sendtext will broadcast to adjacent nodes on iax.
Just like any other iax telemetry data.
Also see asterisk documentation for sendtext.