FOSDEM - Open Source VoIP

[Mikael Magnusson]

Diana Cionoiu wrote:
> Hi Kilian,
> 
> It sounds very nice to have just one application for VoIP but it doesn't 
> really work. Take a look on what happend with Asterisk. Was the only one 
> media gateway we had in the begining, and we all hoped it will be as 
> good as Apache. But things didn't work like that. Asterisk doesn't 
> handle everything. In the same way Ekiga doesn't do everything you will 
> need from a VoIP client. sipX is not the ultimate sip PBX, and ser is 
> not the ultimate sip proxy since is so hard to use.
> The beauty of open source is that we learn from mistakes and we can 
> build better systems. Unified solutions are good in theory but since 
> computers are made to serve humans, and not the other way around (humans 
> to serve computers), and people are so complicated and different, having 
> a unique solution doesn't work.
> Think how many VoIP protocols, and pstn protocols exists.
> I really doubt that we want to lose the diversity the open source provides.
> 
> Diana Cionoiu
> 

I have implemented SRTP and MIKEY on Asterisk[1]. Because of the 
limitations of Asterisk's SIP stack, no TCP support (patch in BTS) and 
no reliable provisional responses etc., I'm thinking of changing to 
another software. TCP is needed since SDP bodies containing MIKEY key 
exchange can be large, several kB. Reliable provisional responses are 
required to eliminate ghost ringing.

I'm looking for an open source SIP PBX, compliant with RFC 3261, 3262 
and 3264. Support for reliable provisional responses both as UAC and 
UAS, and TCP support is crucial.
Support for TLS, RFC 3263, IPv6 and ANAT (RFC 4091, and 4092) would also 
be nice.

Does such open source SIP PBX exist?

[1]http://bugs.digium.com/view.php?id=5413

Mikael