asterisk users - Jul 2009 - Asterisk and G.729 codec: short questions

Dear all, I have Trixbox 2.6 (Asterisk 1.4) installed in my voip server. I
have the following short questions about the usage of G.729 codec:
1) Does Asterisk have installed the G.729 codec by default ???

2) If I don't want to pay for a codec license, using Asterisk in
"pass-through" mode for G.729 voice communications, do I just have to
download the open source version of the G.729 codec or can I use the one
coming in Asterisk ???

3) If I use G.729 for voice communications and GSM for voice mail sounds,
does Asterisk execute trascoding ???

Really thanks

Alejandro
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On Tue, 2009-07-21 at 08:06 -0300, Alejandro Cabrera Obed
wrote:
> 1) Does Asterisk have installed the G.729 codec by default ???
No, you have to install it separately, as it's not open source.
> 2) If I don't want to pay for a codec license, using Asterisk in
> "pass-through" mode for G.729 voice communications, do I just
have to
> download the open source version of the G.729 codec or can I use the
> one coming in Asterisk ???
You can use G.729 pass-through in Asterisk without adding anything
extra.  You only really need the codec module if you're having Asterisk
play prompts or record calls or transcode to/from G.729.
> 3) If I use G.729 for voice communications and GSM for voice mail
> sounds, does Asterisk execute trascoding ???
It will, if you have added the G.729 codec.  




-- 
Jared Smith
Training Manager
Digium, Inc.