As a personal note to myself :-) apt-get install make gcc pkg-config libasound2-dev wget http://www.pjsip.org/release/2.6/pjproject-2.6.tar.bz2 tar -xjf pjproject-2.6.tar.bz2 cd pjproject ./configure && make dep && make sudo make install sudo cp pjsip-apps/bin/pjsua-x86_64-unknown-linux-gnu /usr/local/bin/pjsua That’s it!
If you have issues with your SNOM phones and presence monitoring (the little LEDs that display when another extension is ringing or busy), then maybe this will help. We had this problem at work. When we checked the SIP traces, we could see our server was sending SIP NOTIFY packets to tell the phone “hey your collegue phone is ringing!”, but the phone: (very old firmware) either answered with a 200 OK but did not blink the LED; (latest firmware) or it answered a 481 Call/Transaction Does Not Exist and still did not blink the LED....