[Asterisk-Users] Bandwidth requirement with G729A

[Andres]

Sudhir Kumar wrote:

>I am using G729A. I was expecting a maximum bandwith requirement of
>24Kbps (8Kbps for voice, 16Kbps for IP overhead), however when I measure
>the actual usage, it comes around 30 to 32 Kbps. What happens?
>
>  
>
At 20ms sample time you should be seeing 24-26Kbps(each way).   We have 
measured this many times before.  I suggest you use Ethereal to see what 
else is traveling in the wire.  If you use 60ms then it drops to 13-14 
Kbps (each way), unfortunately this is not possible with Asterisk since 
it forces you to 20ms.