FOSDEM - Open Source VoIP

[Diana Cionoiu]

Hi Mikael,

Well, you can try to add the TLS support in Yate.
There should be 2 stages.
1. Adding TCP which is not an easy job since it changes a lot of things 
in the transaction engine.
Bassically in the UDP protocol the B2BUA has to keep the infos about 
retransmiting sip messages if they didn't arrive. This is not necessary 
in TCP, so the concept is a bit different.
2. TLS is a far more easier problem.

Diana Cionoiu

Mikael Magnusson wrote:
> 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
>
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