Telephony Systems with Asterisk
Set proxy
Configuring Proxy Server Access
To enable all yum operations to use a proxy server,
specify the proxy server details in /etc/yum.conf. The proxy setting must specify the proxy
server as a complete URL, including the TCP port number. If your proxy server
requires a username and password, specify these by adding proxy_username and proxy_password settings.
The settings below enable yum to use the proxy server mycache.mydomain.com, connecting to port 3128, with
the username yum-user and the password qwerty.
# The proxy server - proxy server:port number
proxy=http://192.168.213.222:3128
Change ip-address Permanently
Under the
/etc/sysconfig/network-scripts directory, you’ll see file for every network
interface on your system. For example, if your interface is “eth0″,
you’ll see ifcfg-eth0 file under this directory.
Modify the
ifcfg-eth0 file and change the IPADDR field accordingly as shown below to
change the ip-address.
# vi
/etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE="eth0"
BOOTPROTO=none
NM_CONTROLLED="yes"
ONBOOT=yes
TYPE="Ethernet"
UUID="11111-2222-3333-4444"
IPADDR=192.168.1.2
PREFIX=24
GATEWAY=192.168.1.1
DEFROUTE=yes
IPV4_FAILURE_FATAL=yes
IPV6INIT=no
NAME="System
em1"
HWADDR=DD:BB:DD:AA:11:55
Restart the Network
Finally,
restart the network service, for the system to pick-up the changes.
# service
network restart
Configuration for CentOS7
Following software are configured in CentOS 7
Asterisk 11.4.0
DAHDI 2.7.0 (Digium Asterisk
Hardware Device Interface)
libpri 1.4.14
How to Install Asterisk on CentOS 6.4
1. Log
in to the system as super user
# su –
2. Before
begin, make sure the OS is upto date. Update and reboot if necessary
# yum update -y
3.
Disable
SELinux by changing “enforcing” to “disabled” in /etc/selinux/config
open /etc/selinux/config
Find and set “selinux=disabled”
4.
Reboot the system
# reboot
5. Resolve
basic dependencies
Checkdependencies
# rpm –qa |grep –i make
6.
install dependencies
# yum install –y make
# yum install –y wget
# yum install –y openssl-devel
# yum install –y ncurses-devel
# yum install –y newt-devel
# yum install –y libxml2-devel
# yum install –y kernel-devel
# yum install –y gccgcc-c++
# yum install –y sqlite-devel
# yum install –y libuuid-devel
# check this
# rpm –ivhmake.rpm
7.
Download the asterisk tar files and store it in
/usr/scr/asterisk
Following Links
http://downloads.asterisk.org/pub/telephony/dahdi-linux-complete/dahdi-linux-complete-current.tar.gz
http://downloads.asterisk.org/pub/telephony/libpri/libpri-1.4-current.tar.gz
http://downloads.asterisk.org/pub/telephony/asterisk/asterisk-11-current.tar.gz
8.
Install asterisk
a.
Extract the tar files
# tar xzvf asterisk*
# tar xzvf libpri
# tar xzvf dahdi
b.
install dahdi
Change directory
# cd
/usr/src/dahdi-linux-complete*
Run following
commands
# make
# make install
# make config
c.
install Libpri
Change directory
#
cd /usr/src/libpri*
run following
commands
# make
# make install
d.
Install asterisk
change
directory
# cd /usr/src/asterisk*
for 64 bit computer
#./configure --libdir=/usr/lib64
# make menuselect
Once menuselect is
configured a menu will open in terminal exit the menu and proceed to next
command Exit menu
# make
# make install
If the Installation
is successful proceed run the following commands
# make samples
# make config
If there is any errors check if you have install dependencies or not
after taking care or errors clean the installation directory using the command
9.
Start the services
#
service dahdi start
#
service asterisk start
Go to the aseterisk
CLI use the command
#
asterisk –rvvv
#
installing asterisk is
complete
Setting up PBX
Step 1
Creating SIP Accounts
Backup config file
#
cd /etc/aseterisk
#
mv sip.conf sip.conf.sample
Create a newfile using vi and add the following lines
#
vi sip.conf
Add following lines
[demo-user1]
type=friend
host=dynamic
screet=myscret123
context=users
deny=0.0.0.0/0
permit=192.168.x.x/255.255.x.x
[demo-user2]
type=friend
host=dynamic
screet=myscret123
context=users
deny=0.0.0.0/0
permit=192.168.x.x/255.255.x.x
Reload sip file
# asterisk -rvvv
# sip reload
Configure extentions
# cd /etc/asterisk
# mv extensions.conf extentions.conf.sample
Create a new extensions.conf file using vi
# vi extentions.conf
Add following lines
[users]
exten=>4001,1,Dial(SIP/demo-user1,20)
exten=>4002,1,Dial(SIP/demo-user2,20)
Reload dialplan
# asterisk-rvvv
# dialplan reload
Step 03
Install soft phones
# tar xzvf zoiper
Run the executable file
#./zoiper…..
Then
use a client software (such as Zoiper or X-Lite)
IMPORTANT:
If
the clients not registering with the Asterisk server need to turn off firewall
in CentOS
Disable Firewalld
To disable firewalld, run the following command as root:
# systemctl disable firewalld
Stop Firewalld
To stop firewalld, run the following command as root:
# systemctl stop firewalld
Check the Status of Firewalld
To check the status of firewalld, run the following command as root:
# systemctl status firewalld
Create user accounts at zoiper phone
User name :demo-user1
Password :xxxxxx
IP xxxxx
Linux Basic Commands used for installation
YUM (Yellowdog Updater Modified)
an open source command-line as well as graphical based
package management tool for RPM (RedHat Package Manager) based Linux
systems. It allows users and system administrator to easily install, update,
remove or search software packages on a systems
make
make utility is to determine automatically which pieces of a large program
need to be re-complied
tar
You need to
use the tar command to extract files from an archive or to create an archive
(also known as tarball). A tarball or an archive is nothing but a single file
that contains various individual files. It also includes information which
allows your to restore files to their original form by one or more extraction
programs such as tar command.
Where,
-x :
Extract a tar ball.
-v :
Verbose output or show progress while extracting files.
-f :
Specify an archive or a tarball filename.
-j :
Decompress and extract the contents of the compressed archive created by bzip2
program (tar.bz2 extension).
-z :
Decompress and extract the contents of the compressed archive created by gzip
program (tar.gz extension).
./configure
The above command makes the shell run the script named ' configure '
which exists in the current directory