[Dxspider-support] [Fwd: Dx Spot Beacon]

[Dirk Koopman]

On Thu, 2005-10-27 at 19:24 +0200, Thomas Maisl wrote:
> iz5fsa at tele2.it schrieb:
> > 
> > 2) I want a new "protocol" connection between node and
> > clients with "no protocol", as UI packet. When I am on the
> > frequency, I put my tnc in converse mode and I want the
> > node recognize me as registered user "on demand" without
> > logging in, when I send him a command as UI packet. I need
> > a function that allow me to use the commands, for example:
> > sh/qrz
> > sh/usdb
> > sh/425
> > sh/dx
> > even if not logged in, simply sending them as UI frames.
> UI frames very often get lost. When the user port is busy you don't know if
> your command got lost or is already in the queue to be replied. 

Ok, let us get some things straight about AX25:-

1. A UI frame is an unconnected I frame. Therefore is not really very
different
to an I frame in a connected circuit. 

2. There have been a number of UI based protocols out used out there
(including one I designed 15 years ago), more modern examples include
APRS. 

3. A simple point to point protocol could easily be devised. I would
argue it might even be more channel friendly than standard connected
mode. This could mix with broadcast traffic.

4. Any UI based protocol would need some specialised client support (at
least to sort out the broadcast from the point to point traffic). One
would have to do the protocol part in a component of some sort and it
should allow more than one interface type (eg KISS or AGW). 

5. I don't have time to do it.

Dirk G1TLH