[Xastir] Messaging

Curt, WE7U archer at eskimo.com
Thu Dec 30 19:20:47 EST 2004


On Thu, 30 Dec 2004, Tom Robson, ve7did wrote:

> > *) Delayed Ack Path:  We now send delayed ack's at t+30, t+60, and
> > t+120 seconds after we send our first ack, if the remote station is
> > sending duplicate messages to us.  The path used by any of these
> > ack's remaining in the queue should get changed to whatever is in
> > the Path: box in the Send Message dialog.  They should get changed
> > at the point the dialog is closed or the Send Now! button is
> > pressed.
> >
> I'm a bit!! confused on this one... Do I assume that the remote station
> initiates the qso?  We then try and send an ack back and the remote station
> does not receive it, therefore the remote station sends the message again. If
> we receive it before the 30 seconds is up we resend the ack based on our path
> setting and not the reverse path.
>
> So it looks like we try and use the reverse path 3 times before using our
> path.  7,14,28 secs
>
> Do I have it close?

Nope.  Works this way:  Someone is trying to get a message to you.
You're trying to ack it.  To test, turn off your transmit enable
after asking them to send you something.  This will cause them to
send something to you repeatedly.  Xastir will send an immediate ack
the first time (except it won't actually get to send it).  On the
2nd and folowing messages from the remote station Xastir will send
an immediate ack PLUS queue up three more ack's to be sent at
various intervals.  At that point you can change the outgoing path,
turn on transmit, and see the new path get used when they go out.

--
Curt, WE7U.   APRS Client Comparisons: http://www.eskimo.com/~archer
"Lotto:    A tax on people who are bad at math." -- unknown
"Windows:  Microsoft's tax on computer illiterates." -- WE7U
"The world DOES revolve around me:  I picked the coordinate system!"



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