[Asterisk-Users] G729 codec

[Ivan Meic (Vox Mundi)]

>Actually G.729A is a reduced complexity version, and G.729B is a version 
>with silence suppression. The data rate while sending voice is exactly 
>the same, although the quality of G.729B should be a little higher. 
>However the average rate for B can be lower if the silence suppression 
>is used. Right now Asterisk doesn't make use of that silence 
>suppression, so it makes not difference.

Steve,

Any Cisco gateway support two G.729 variants.
They call them g729r8 and g729br8.
So I guess that Cisco never implemented a reduced complexity version ?
Also as far as I understand there are 3 G.729 variants generaly used.
The first version (G.729), Annex A and Annex B.
Are they all compatible with each others ?

Ivan