[Asterisk-Users] Prices of g729 codec

[trixter aka Bret McDanel]

On Fri, 2006-06-02 at 22:49 +0200, Alejandro Vargas wrote:
> 2006/6/2, Leon Sun <leon at timestelecom.ca>:
> > 10$/channel
> 
> If you are connecting a device that uses g729 with another that don't
> support it... let's say it uses gsm. Then you will use 2 channels, one
> for encoding and one for decoding. Is it?
> 
> 

one g729 license can encode, decode or both.  The g729 consortium doesnt
differentiate.  However if you have 2 channels (ie call to A bridged to
B) and asterisk is doing any translations between them then it will use
a license for any translations that it does.  Normally if A calls B via
an asterisk box and both are g.729 then it just pushes bits and doesnt
use a license.  

To create a contrived setup, lets say that A calls B both are g.729 and
asterisk is playing some sound files in between, meaning its not just
pushing bits but has to insert data, say from a gsm file which it must
transcode, then it will use 2 licenses, one for each call leg.  Although
a meetme example would probably be better than what I just gave, but
meh ...

In other words the g729 consortium liceneses per channel, regardless of
whether its encoding, decoding or both.  A channel is typically an
individual call leg.  In your example, if you have 1 G.729 channel and
one non-G.729 channel you should only need 1 license to handle that
channel.  The only time you would need 2 is if you have sound files in
g.729 format that you are playing to both callers (or at least to the
one that doesnt use g.729).  Then you would need an additional G.729
license to decode that file.

This probably just added to the confusion, I cant say ...
-- 
Trixter http://www.0xdecafbad.com     Bret McDanel
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