[asterisk-dev] SIP Stack Research

joachim zoachien at securax.org
Thu Nov 8 07:35:41 CST 2012

I can't speak for the other projects due to a lack of experience with 
them, but we (Zoiper) are very happy with Resiprocate. The product is 
rock stable and the core team is very skilled.


On 8.11.2012 г. 14:41 ч., Joshua Colp wrote:
> Hola,
> (Apologies for the semi-long email)
> As Mark mentioned in his earlier email I've been working on 
> researching viable SIP stacks for the new SIP channel driver. I've 
> scoured the far reaches of the internet looking for new stacks that 
> may have come into existence since my previous Asterisk SCF research 
> but in the end the three that came to the top were Sofia-sip, 
> Resiprocate, and pjsip.
> You can find my research on them at 
> https://wiki.asterisk.org/wiki/display/AST/SIP+Stack+Research
> I've detailed what I looked at and the impressions I got for each. 
> This is by no means a deep deep deep analysis as that would take 
> considerably more time. What it does cover though is the community for 
> each project, how easy it is to use, general impression on features, 
> interoperability, and (in my opinion) most importantly documentation.
> Through doing all of this research I have learned that there is no 
> perfect SIP stack, but all of the ones I mentioned will do what we 
> need. No matter which one you choose though you are effectively giving 
> up something you could have gotten with another one so we have to find 
> a balance. I think our balance should be towards a stack that has 
> great documentation, is easy to use (and expand), provides the 
> features we want, and still has an active community.
> After examining the three options I've ordered them as follows 
> according to my personal opinion against the above:
> 1. pjsip
> 2. Resiprocate
> 3. Sofia-sip
> But Josh, why did you order it as such?!?
> Good question, Josh.
> The documentation for pjsip is great and makes it easy to learn 
> exactly how to use it and what is going on. The general architecture 
> of it makes extending it *extremely* easy and you can inject your own 
> modules at many different layers. The project itself is still being 
> actively developed and maintained. The time required to get up to 
> speed and use pjsip is also very low since there are people in the 
> Asterisk community who are familiar with it and have used it.
> Resiprocate came second because the documentation is not as complete 
> or expansive as pjsip, 'nor is the higher level (APIs that reduce the 
> amount of code we have to write) feature count. It would also be more 
> difficult to use it with Asterisk as it is C++ based, and this would 
> also decrease the number of people who could help with that integration.
> Sofia-sip came last because it did not have as good of documentation 
> as resiprocate or pjsip and the project itself seems to have become 
> stagnant. It also lacks as many higher level features as pjsip.
> The purpose of this email is to bring about discussion on this subject 
> as a whole and try to reach a conclusion on which SIP stack would be 
> the best in the eyes of the community.
> Thanks for reading this long email and I look forward to the discussion.
> Cheers,

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