Asterisk on centos (deprecated)
this guide was gathered from official asteriks wiki (https://wiki.asterisk.org/wiki/display/AST/Asterisk+Packages#AsteriskPackages-YUM(CentOS6/RedHatEnterpriseLinux6)) first of all install libsrtp and libsrtp-devel
yum install libsrtp libsrtp-devel
Adding the repository
rpm -Uvh http://packages.asterisk.org/centos/6/current/i386/RPMS/asterisknow-version-3.0.0-1_centos6.noarch.rpm yum update
install
yum install asterisk asterisk-configs --enablerepo=asterisk-11
install dahdi
yum install dahdi-linux dahdi-tools libpri
again upgrade
yum update