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

[Olle E Johansson]

The early bridge is an asterisk concept where we set up the call  
directly
between two endpoints instead of making the decision later and sending
re-invites.

We do support early media but not with PRACK. That's a different thing.

/O
3 okt 2007 kl. 09.57 skrev 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
>
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