[Asterisk-Dev] G.729 or G.729A codec

[Kevin P. Fleming]

Avin Patel wrote:

> I have checked the asterisk code, It looks like G.729 is NOT support, But
> G.729A is supported by Asterisk. Is this correct?

> Is G.729 & G.729A are different?

G.729 (no suffix) is not in widespread use. G.729A and G.729B/AB are; 
the B suffix adds silence suppression and comfort noise generation.

Since Asterisk does not currently support VAD/silence suppression 
properly, it only offers to support G.729A. The Digium G.729 codec 
binary has the ability to support G.729AB as well, but it is currently 
disabled since Asterisk cannot support it.