asterisk users - Dec 2006 - G729 Passthru?

I have a SIP carrier which accepts only G729 connections from my
Asterisk server. If all the server does is Dial() (out) two legs of a
call which are natively bridged, with no processing the media (and no
DTMF detection, etc), do I need to install a G729 codec of my own? All
the media from each leg connected to the other is already encoded into
G729 by the SIP carrier from which it's coming for feeding back to the
SIP carrier. Does that "loopback" work without a G729 codec on the
server? If not, what would the codec actually do with the data it gets?

	A related issue is whether I can pre-encode recorded audio files with a
G729 codec. So the server can send "wakeup call" messages to the SIP
carrier without running the codec at call time, just sending the
pre-encoded media to the SIP carrier.
-- 

(C) Matthew Rubenstein

I think you do need to buy the G729 for each call. If your system is 
using anything other than G729.

That is the way I was told it works. But I don't use G729.

Best regards,

Al Bochter
Bochter Services
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Matthew Rubenstein wrote:
>	I have a SIP carrier which accepts only G729 connections from my
>Asterisk server. If all the server does is Dial() (out) two legs of a
>call which are natively bridged, with no processing the media (and no
>DTMF detection, etc), do I need to install a G729 codec of my own? All
>the media from each leg connected to the other is already encoded into
>G729 by the SIP carrier from which it's coming for feeding back to the
>SIP carrier. Does that "loopback" work without a G729 codec on the
>server? If not, what would the codec actually do with the data it gets?
>
>	A related issue is whether I can pre-encode recorded audio files with a
>G729 codec. So the server can send "wakeup call" messages to the
SIP
>carrier without running the codec at call time, just sending the
>pre-encoded media to the SIP carrier.
>  
>