Install

sudo apt-get install build-essential
sudo apt-get install openssl libxml2-dev libncurses5-dev uuid-dev sqlite3 libsqlite3-dev pkg-config libjansson-dev
sudo apt-get install libcurl4-gnutls-dev

cd /usr/local/src
wget http://downloads.asterisk.org/pub/telephony/asterisk/asterisk-13-current.tar.gz
wget http://downloads.asterisk.org/pub/telephony/libpri/libpri-current.tar.gz 
wget http://downloads.asterisk.org/pub/telephony/dahdi-linux/dahdi-linux-current.tar.gz 
wget http://downloads.asterisk.org/pub/telephony/dahdi-tools/dahdi-tools-current.tar.gz 
wget http://downloads.asterisk.org/pub/telephony/dahdi-linux-complete/dahdi-linux-complete-current.tar.gz 
wget http://www.pjsip.org/release/2.5.5/pjproject-2.5.5.tar.bz2