asterisk users - Jul 2005 - G729 - What versions can Asterisk support?

Hello,

I'm trying to find out if Asterisk will support plain G729 or G729b. 
I've read all over that it supports G729, but I can't seem to find any 
explicit remarks regarding the specific versions of the codec Asterisk 
will support.  I noticed that Digium allows Asterisk users to register 
and download G729a, but refers to it as G729 on it's pages. I also 
noticed that on Digium's ftp site (ftp.digium.com), there is a sub 
directory called "old-voiceage" that contains the G729b codec. Our 
company is looking to use the G729 or G729b version because they believe 
it will produce better quality sound than the G729a version. If that is 
true, should I use the version of the coded found on Digium's ftp site 
in the /pub/asterisk/g729/old-voiceage/ directory and register via 
Digium's online Yahoo store? Any help would be greatly appreciated. 
Thank you in advance :)

--Timothy Karl

Tim Karl wrote:
> I'm trying to find out if Asterisk will support plain G729 or G729b. 
> I've read all over that it supports G729, but I can't seem to find
any
> explicit remarks regarding the specific versions of the codec Asterisk 
> will support.  I noticed that Digium allows Asterisk users to register 
> and download G729a, but refers to it as G729 on it's pages. I also 
> noticed that on Digium's ftp site (ftp.digium.com), there is a sub 
> directory called "old-voiceage" that contains the G729b codec.
Our
> company is looking to use the G729 or G729b version because they believe 
> it will produce better quality sound than the G729a version. If that is 
> true, should I use the version of the coded found on Digium's ftp site 
> in the /pub/asterisk/g729/old-voiceage/ directory and register via 
> Digium's online Yahoo store? Any help would be greatly appreciated. 
G.729 and G.729a produce identical sound streams; they only differ in 
the complexity (and speed) of the implementation.

G.729b and G.729ab include silence suppression, which Asterisk does not 
support. Peers that also support G.729b/ab need to be configured with 
silence suppression disabled when used with Asterisk.