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

[Vlasis Hatzistavrou - asterisk mailing list account]

Kevin P. Fleming wrote:

> 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.
> _______________________________________________

Hello,

We have used OH323 extensively which adds in its media capabilities 
various flavors of G729, and at the same time we used the G729A codec 
from Digium.In all cases we have made successful calls to and from Cisco 
and other equipment with various G729 codecs other than G729A and it 
worked fine. According to the G729 standard, all G729 flavors should be 
bitstream compatible, AFAIK. Could this mean that the G729A codec from 
Digium could be used to code/decode any G729 codec?

Best regards,
Vlasis Hatzistavrou.