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Sep 30 15

How To: Install Asterisk on Centos Rackspace Cloud Server with Dahdi Video

by Jon

Learn how to install Asterisk on a Rackspace cloud server. This is an easy to follow step by step guide with all the commands you need to compile and install Asterisk with Dahdi.

Aug 20 15

How To: Install and Compile Asterisk Certified 11 on Rackspace Cloud Centos 5

by Jon

I use Rackspace for most of my cloud servers since their support is second to none. They are always very helpful in getting me answers or even going above and beyond what they technically support. So because of this I often build Asterisk servers up there to test with or even for production use. Here is an easy to follow guide on how to build an Asterisk 11 server using Centos 5 image. You can just copy and paste the commands one by one or add them to a text file and run as a script.

Note: This step by step guide is for 64bit operating systems, if you use a 32bit Centos 5 server it will fail.

yum -y update
sed -i s/SELINUX=permissive/SELINUX=disabled/g /etc/selinux/config

Then we need to install some packages:

yum -y install bind-utils curl-devel doxygen gcc gcc-c++ gtk+ gtk+-devel gnutls-devel httpd kernel-xen kernel-xen-devel kernel kernel-devel kernel-smp-devel kernel-smp libxml2-devel libtermcap-devel libtool-ltdl libtool-ltdl-devel make mysql mysql-server mysql-devel mysql-server-devel mysql-connector-odbc net-snmp-devel neon-devel newt-devel ncurses-devel ntp openssl-devel openssl perl-suidperl php-mysql system-config-securitylevel screen texinfo unixODBC unixODBC-devel wget

Now we can do the heavy lifting of installing Asterisk, Dahdi and LibPRI.

cd /usr/src
tar zxf certified-asterisk-11.6-current.tar.gz 
tar zxf dahdi-linux-complete-current.tar.gz 
tar zxf libpri-1.4-current.tar.gz
cd /usr/src/dahdi-linux-complete-*
make && make install && make config
cd /usr/src/libpri-1.4*
make && make install
cd /usr/src/certified-asterisk-11.6-*
./configure --libdir=/usr/lib64 && make menuselect && make && make install
make samples
make config
service dahdi start
service asterisk start

All done! It really is that easy ūüėČ

Jul 2 15

Asterisk Click to Call from Webpage using the AMI Commands

by Jon

Are you trying to figure out how to set up click to call from a webpage using the Asterisk AMI? Well look no further, this is an easy to follow guide on exactly how to do it.

So before we start a couple of things you have to know about my environment. First I am hosting the webpage on the Asterisk server for the click to call so I have Apache installed and running, second I have port 80 open on the Asterisk server firewall so I can allow external requests.

So first thing you need to do is configure your Asterisk manager config file with a username who can originate the call.


displaysystemname = yes
enabled = yes
webenabled = yes
port = 5038

; Authorization for various classes
read = system,call,log,verbose,command,agent,user,config
write = system,call,log,verbose,command,agent,user,config

Once you create a user and password, in this case I have the username “clickadmin” then you can start writing the php code.


$extension = $_REQUEST['internalnum'];
$dialphonenumber = $_REQUEST['outboundnum'];

$timeout = 10;
$asterisk_ip = "";

$socket = fsockopen($asterisk_ip,"5038", $errno, $errstr, $timeout);
fputs($socket, "Action: Login\r\n");
fputs($socket, "UserName: clickadmin\r\n");
fputs($socket, "Secret: asdf1234S3\r\n\r\n");


echo $wrets;

fputs($socket, "Action: Originate\r\n" );
fputs($socket, "Channel: SIP/$extension\r\n" );
fputs($socket, "Exten: $dialphonenumber\r\n" );
fputs($socket, "Context: dial-outbound\r\n" ); // very important to change to your outbound context
fputs($socket, "Priority: 1\r\n" );
fputs($socket, "Async: yes\r\n\r\n" );

echo $wrets;

So that webpage will respond to url post of http://[ip address]/clickcall/index.php?internalnum=101&outboundnum=4075551234

It will first place a phone call to the extension number, in the example case would be 101. Once extension 101 answers that call it will then place the outbound leg of the call to phone number 4075551234.

Jun 19 15

Udemy Asterisk Training Course Survey

by Jon

I love to hear from my students so today I am posting a survey for you to fill me in on what you want more of. Tell me what you like and what you don’t like, or what you want to see more of. Say whatever you want, I am here to listen to you.

Jun 15 15

How to Install and Compile Asterisk 13 on CentOS 7

by Jon

I just created a video of how to install Asterisk 13 on CentOS 7 64bit so anyone can follow along. I take this step by step to make it very easy to install the latest version of Asterisk. See the commands below the video.

Udemy Asterisk Training Course for 95% Off

yum install automake bluez-libs-devel bzip2  corosynclib-devel gcc  gcc-c++ git gsm-devel jansson-devel libcurl-devel libedit-devel libical-devel libogg-devel libsrtp-devel libtool-ltdl-devel libuuid-devel libvorbis-devel libxml2-devel libxslt-devel lua-devel mariadb-devel nano ncurses-devel neon-devel net-snmp-devel newt-devel openldap-devel openssl-devel perl popt-devel postgresql-devel speex-devel sqlite-devel subversion unixODBC-devel uuid-devel wget

cd /usr/src/



bzip2 -d pjproject-2.4.tar.bz2

tar xvf pjproject-2.4.tar

cd pjproject-2.4

./configure CFLAGS="-DNDEBUG -DPJ_HAS_IPV6=1" --prefix=/usr --libdir=/usr/lib64 --enable-shared --disable-video --disable-sound --disable-opencore-amr

make dep


make install


cd /usr/src

tar zxfv certified-asterisk-13.1-current.tar.gz 

cd certified-asterisk-13.1-cert2/


./configure --libdir=/usr/lib64

make menuselect


make install

make samples

make config

service asterisk start

asterisk -rvvv
May 21 15

How to Fix NTP Error Linux sntp: adj_systime: Invalid argument

by Jon

One of my clients AstLinux PBX’s was acting up a couple weeks ago by going into after hours mode in the middle of the day. Upon further investigation it turned out the PBX had lost power and rebooted so I realized the date/time was very wrong. The date command revealed the operating system believed it was 1999 so I figured the CR2032 battery on the board had gone bad. After replacing the battery I was expecting NTP to set the correct time for me, well that was a wrong assumption.

I restarted the NTP service many times only to continue getting an error of:

pbx ~ # service ntpd start
Starting ntpd...
sntp 4.2.8@1.3265-o Sat Feb  7 06:51:14 UTC 2015 (1)
2015-08-15 05:06:36.118274 (+0500) -8696498.478863 +/- 5797665.661695 s2
adj_systime: Invalid argument

I checked the logs which reported the same issue:

pbx ~ # date
Sat Jan 22 15:59:53 EST 2000
pbx ~ # cat /var/log/messages
Jan 22 16:07:48 pbx daemon.notice ntpd[517]: ntpd 4.2.8@1.3265-o Sat Feb  7 06:49:37 UTC 2015 (1): Starting
Jan 22 16:07:48 pbx ntpd[517]: Command line: ntpd ?
Jan 22 16:07:48 pbx ntpd[518]: proto: precision = 11.734 usec (-16)
Jan 22 16:07:48 pbx ntpd[518]: getconfig: Couldn't open 
Jan 22 16:07:48 pbx ntpd[518]: Listen and drop on 0 v4wildcard
Jan 22 16:07:48 pbx ntpd[518]: Listen normally on 1 lo
Jan 22 16:07:48 pbx ntpd[518]: Listen normally on 2 eth0
Jan 22 16:07:48 pbx ntpd[518]: Listening on routing socket on fd #19 for interface updates
Jan 22 16:09:03 pbx sntp[700]: sntp 4.2.8@1.3265-o Sat Feb  7 06:51:14 UTC 2015 (1)
Jan 22 16:09:03 pbx sntp[700]: 2000-01-22 16:09:03.294382 (+0500) +482356762.551 +/- 321571175.034339 s1
Jan 22 16:09:03 pbx user.err sntp[700]: adj_systime: Invalid argument

At this point I figured the date was so far off that the system could not calculate the correct time based on the Invalid argument log entry. So I went ahead and manually set the date/time using the date command.

pbx ~ # date -s 2015.05.17-13:28:00
Sun May  17 13:28:00 EDT 2015

Then I did a restart on the NTP service which restored NTP to working order.

pbx ~ # service ntpd restart

All was back to normal after that, just make sure to manually set the time to be as close as possible then restart the ntpd service.

Apr 7 15

How To: Add Gmail Account to Mail App on Apple iPhone or iPad IOS8

by Jon

If your like me and use an iPhone to do a lot of you’re emailing then it is imperative to have a gmail account connected to it. Below are the quick and easy steps to configure a Gmail account on your iPhone or iPad using the latest version of Apple IOS8.

1. Click on the settings app from your home screen

2. Then click on Mail, Contacts, Calendars

3. Now click the Add Account button

4. Next select the Google option

5. Sign in using your Gmail account username and password

6. Google will now ask you if you want to allow IOS to access your account, make sure to click accept.

7. The next screen will ask you what information you would like to use with your Gmail account, I prefer only using Mail but you can include all of these options by toggling the slider.

8. Once that has been updated you will get bounced out to the Mail, Contacts, Calendar menu where you will want to click on the newly created account for one last setting change.

9. Again select the account you are adding to the iPhone for the first time.

10. Finally here is where you want to enter in your name so when you send and reply to emails from your iPhone they are presented using your name. Make sure to save after entering your name.

Good luck and let me know if you have any questions or feedback.

Mar 23 15

How To: Build your Own Virtual Cloud Phone System Training 60% Off

by Jon

Do you want to build your own cloud phone system?
Do you want a get your own dedicated phone number?

How would you like to do all of this for less than the cost of a cup of coffee?

I recently finished another udemy training course where I walk you through step by step to building a cloud phone system and ordering a phone number. If you are looking to stop using your cell phone for all your work and personal phone calls this class is for you and for being a visitor of my blog get 60% off the original price.

Use this link to get the discount.


Feb 27 15

Share your iPhone or iPad screen on your Mac computer display for demos

by Jon

There are many times when I would like to present my iPhone on a projector or large computer screen to show others an app or something on my phone. This has been a challenge in the past using tools like airplay or some third-party apps. Well not anymore, with OS X Yosemite there is now a native tool to display your iPhone or iPad right on your computer screen. QuickTime player now has an easy to use option to make your phone the video source. See below for how to set up the screen sharing option.

1. Plug your iPhone or iPad into your Mac using the usb lightning cable.


2. Open iTunes and click Trust on your iPhone/iPad pop-up to allow your computer access to the device.


3. Open QuickTime Player from Applications menu.


4. From the QuickTime file menu select New Movie Recording.


5. By default the movie screen will open using the computers FaceTime camera. Click the down arrow next to the record button then select your iPhone/iPad.


6. Now your phone will appear in the QuickTime movie window which will allow you to display to others or start a recording.


Jan 31 15

How to: Linux and Asterisk Training Video’s

by Jon

I just posted my first Udemy course on learning Linux and Asterisk. If you are having problems getting started with Asterisk and Linux this is an easy step by step video series where I walk my students all the way through installing Linux and compiling Asterisk. I have included a link to the course below.