sems core is a part of project Yeti
# echo "deb http://pkg.yeti-switch.org/debian/jessie stable main ext" > /etc/apt/sources.list.d/yeti.list
# apt-key adv --keyserver keys.gnupg.net --recv-key 9CEBFFC569A832B6
# apt update
# apt install sems sems-modules-base
# aptitude install git cmake build-essential libssl-dev libpqxx3-dev libxml2-dev libspandsp-dev libsamplerate-dev libcurl3-dev libhiredis-dev librtmp-dev libzrtpcpp-dev libev-dev python-dev libspeex-dev libgsm1-dev
$ git clone [email protected]:yeti-switch/sems.git
$ cd sems
$ ./package.sh