What is the best Java SIP Stack around? [closed]

Question

What is the best Java SIP Stack I can use.

I'm looking for Stable, Efficient, Rich Feature-Set, Stable & Bug-less :)

Answer 1

MjSip - complete, well documented, and Open Source

Answer 2

I hope it is NOT MjSip. I may be wrong but I don't think that the api has been worked on since 2005. I have used it for a month now and it is missing some higher level things like easy dtmf support and has the occasional bug. Although, I think some decent projects like SipDroid for android used it as a basis.

Two other stacks I know of are:

1) PJSIP-JNI which is java bindings for the C PJSIP library

2) JAIN-SIP