Hi,

after thinking about this feature I recognized that there are some
problems:

Real radio has a limited range. So you can use the same frequency at
every point on the world. If you can hear someone on the same frequency
depends on how much power his transmitter has (and some other physical
rules) and/or how far away he is and so on. But with the normal radio
in a plane (or on ground) you cannot reach the whole world. And radio
communication is a broadcast media.

Now try to solve this with unicast media (such as VoIP). Without
information about the coords of each member you cannot decide "how far
away" you can be heared by other users.

I have tried to fix this problem by using one well known coordinate (the
one of the tower) and the next one of the plane - and a limited range.
fgcom calculates which airport is most nearby your selected frequency.
With the coords of this airport it can calculate how far away fgcom is
and it can drop the line if it is out of range.

The ideal algorithm would be some kind of conference server which gets
the frequency it is responsible for, the voice streams _and_ the coords
of all members on this frequency. With this data the stream for _each_
member can be mixed up (far away = quite) and send it towards each
client.

The problem is: that has not much to do with VoIP - so you havn't any
features of VoIP and no implementations for server and client. Feel free
to do so :-)

Perhaps someone can extend the IAX2 protocol and write a new
app_meetme.so for Asterisk which ca realise this. But I think it is not
really neccessary at this time.

Regards, Holger

On Tue, Dec 18, 2007 at 07:47:59PM +0100, AnMaster wrote:
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> 
> So when will this be fixed. Considering the type of flights I normally make I
> really need this feature. For example I was planning cross atlantic flight 
> with
> in air refueling over mp using fgcom but until this BUG is fixed that is not
> possible. Because I consider it a bug.
> 
> Regards,
> 
> Arvid Norlander
> 
> Csaba Halász wrote:
> > On Dec 18, 2007 5:36 PM, AnMaster <[EMAIL PROTECTED]> wrote:
> >> When I select a frequency that is not a tower freq for any nearby airport I
> >> always get "Call rejected by remote". That is wrong, I should be able to 
> >> use any
> >> frequency anywhere and talk to any aircraft within range. There is no 
> >> airport
> >> out over the Atlantic for example. There are a lot of places with no 
> >> airport in
> >> range, yet I should be able to talk to other aircrafts within range of my 
> >> radio,
> >> and only those.
> > 
> > Yes, the design of fgcom doesn't support that at the moment. That is
> > not a bug, but a limitation.
> > Currently fgcom is mostly usable for fixed position ATC.
> > 
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