My goal is to establish a very simple telephony system with Asterisk 13 and PJSIP, and enable two softphones (i.e. MicroSIP), so they could call each other, text message each other, and know if each other is online or offline.
What should I have on extensions.conf, pjsip.conf, and so on, so I can reach my goal?
I have been looking on the web for a simple example of this setup for many days but have not found yet. Information about pjsip on asterisk (for beginners) is scarce on the web. Any help is welcome, even to suggest another kind of software, or any other idea. My server is running on Ubuntu 14.
Thank you, Marcio