Tracking development of pjsip, the Open Source SIP, media, and NAT traversal stack/SDK/library for Android, iOS, Windows, Linux, MacOS, RTOS, embedded, and pretty much anything, any device.
Also check PJSIP Documentation site.
PJSIP 2.2.1 is released which mainly contains bug fixes for 2.2. For the complete list, have a look at the Release Notes.
We would recommend anyone using 2.2 to upgrade to this version. Please see the download page as usual for more info.
Here is where we talk about pjsip development in general, and maybe other stuff as well. For the project itself, please go to the main pjsip project website. or pjsip documentation.
PJSIP is backed by Teluu, which provides professional support, additional licensing options, and a network of qualified consultants.
pjsip blog 