[asterisk-dev] Why does chan_sip disable early bridging???

[Sergio Garcia]

---------- Original Message ----------------------------------
From: Olle E Johansson <olle at voop.com>
Reply-To: Asterisk Developers Mailing List <asterisk-dev at lists.digium.com>
Date:  Wed, 3 Oct 2007 09:44:11 +0200

>The reason early bridge was disabled by default (but can be enabled  
>in the configuration)
>was that it had some pretty large design flaws when used with the SIP  
>offer/answer model.
>There's no way to signal back what the answering device offers in the  
>SDP and in those
>cases the call setup might fail miserably. If you test it and it  
>works, keep it enabled in
>the configuration.
>
>The videocaps branch has some ideas on how to signal back to the caller
>properly and this was discussed on the developer meeting in Atlanta, but
>seems to have gotten stuck somewhere in the process.
>
>/O
>

Hi Olle, I'm just curious about the issue..

Could you explain a bit better what are those designs flaws? 
The early media in SIP is covered by the PRACK method, is there any issue
that prevent us of implement it?


Best regards
Sergio