参考官方文档:
https://freeswitch.org/confluence/display/FREESWITCH/CentOS+7
https://freeswitch.org/confluence/display/FREESWITCH/CentOS+7+and+RHEL+7
1) Make sure yum update is run and CentOS is up-to-date
2) {optional} inside Terminal window select Edit Profile Preferences and select "Use custom default terminal size" and make it 160 x 60. Close terminal and re-open for the change to take affect.
3) yum -y install git
4) yum -y install epel-release
5) rpm -Uvh http://files.freeswitch.org/freeswitch-release-1-6.noarch.rpm
6) yum -y install git gcc-c++ autoconf automake libtool wget python ncurses-devel zlib-devel libjpeg-devel openssl-devel e2fsprogs-devel sqlite-devel libc