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 version 2.5 is released with main focus on Opus codec and WebRTC AEC integrations. The PJSIP bundled libsrtp package has also been upgraded to version 1.5.4 which brings a higher level of media security via AES-256 crypto suites.
As usual the release also includes several enhancements and bug fixes, please see the Release Notes page for more info and grab the source code from the Download page.
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 