Or Put another Way Asterisk acts in SIP terms as a Back2Back User Agent, to terminate one side of the call let and originate a new call leg with a different codec profile in the SIP/SDP. Asterisk then terminates the inbound media, transcodes it an originates a new media stream on a completely different call leg.

2009/1/23 Iñaki Baz Castillo <ibc@aliax.net>

2009/1/23 Rawshan Iajdani <iajdani@provati.com>:
>
> UA----->OpenSer(Outbound Proxy)---------Register Server
> | |
> |
> Asterisk(codec converion)----------------------
>
> The UA will register to Register server through outbound proxy OpenSer. When
> UA makes call it first comes to Openser, OpenSer should route the media to
> Register server through Asterisk for codec conversion. OpenSer will not hold
> any User account rather it will act as a proxy.

Asterisk cannot receive *just* the media, it needs to receive the SIP
signalling so then it can handle the media (and do the codec
conversion).

--
Iñaki Baz Castillo
<ibc@aliax.net>

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