Asterisk is an open source framework for building communications applications. Asterisk turns an ordinary computer into a communications server. Asterisk powers IP PBX systems, VoIP gateways, conference servers and other custom solutions. It is used by small businesses, large businesses, call centers, carriers and government agencies, worldwide. Asterisk is free and open source.
The tutorial was prepared with our "CentOS 7" template and is meant to work on our self-managed virtual private servers.
0. Preliminary requirements:
"CentOS 7" template installed on server;
Fully updates server software (yum update).
1. Installing dependencies
yum install epel-release dmidecode gcc-c++ ncurses-devel libxml2-devel openssl-devel newt-devel kernel-devel sqlite-devel libuuid-devel gtk2-devel jansson-devel binutils-devel -y
2. Installing PJPROJECT
First of all we create a directory in which we perform all the actions:
mkdir ~/install
cd ~/install
Then we have to download PJROJECT and extract it:
wget http://www.pjsip.org/release/2.5.5/pjproject-2.5.5.tar.bz2
tar -jxvf pjproject-2.5.5.tar.bz2
cd pjproject-2.5.5
Now we prepare program for compilation:
./configure --prefix=/usr --libdir=/usr/lib64 --enable-shared --disable-video --disable-sound --disable-opencore-amr
And also make sure that all dependencies are in place:
make dep
make
Finally we install the packages:
make install
ldconfig
3. Installing Asterisk
Let's go back to our "install" directory:
cd ~/install
Now we have to download Asterisk files and extract them:
wget http://downloads.asterisk.org/pub/telephony/asterisk/asterisk-13-current.tar.gz
tar -zxvf asterisk-13-current.tar.gz
cd asterisk-13.10.0/
"13.10.0" can change depending on current Asterisk version.
If you will want to use MP3 files for music on hold calls we have to install some dependencies:
yum install svn -y
contrib/scripts/get_mp3_source.sh
Now we get back to configuring Asterisk:
./configure --libdir=/usr/lib64
make menuselect
After this command you should get menu on screen that allows you to configure the features you want to build. In this menu we have to select:
"Add-ons" -> "format_mp3"
And also "Extra Sound Packages" -> "EXTRA-SOUNDS-EN-WAV"
We save and exit with button "F12".
In the end we compile and install Asterisk with sample configuration:
make
make install
make samples
make config
4. Checking the installation
We start Asterisk with:
service asterisk start
And to connect to Asterisk we use:
asterisk -rvv
For more information about Asterisk and its configuration visit: https://wiki.asterisk.org/wiki/display/AST/Basic+PBX+Functionality
