Asterisk is an open source IP PBX platform. With Ozeki NG SMS Gateway
you can add SMS functionality to Asterisk PBX. Once you have
Ozeki NG SMS Gateway installed, you can send voice mail notifications,
fax notifications, missed call alerts and SMS text messages on various events.
This SMS Gateway provides a much better option for SMS messaging then the
built in SMS functionality of Asterisk. Ozeki NG SMS Gateway can use GSM Modem(s)
attached to your server and IP SMS connections (SMPP, UCP, CIMD2, etc) to send
the SMS messages.
How does it work?
To get the system working, you have to attach a GSM phone or GSM Modem to
your PC with a phone-to-PC datacable (Figure 1.). This GSM phone will send
the SMS messages. After the phone is attached, you need to install the Ozeki
NG SMS Gateway software and configure the GSM Modem in it.
Ozeki NG - SMS Gateway will be responsible for encoding the messages and
for handling your phone.
The next step is to install the ngSMS extension to Asterisk PBX. The ngSMS
module can be downloaded on this webpage. It makes it possible for you to use
the ngsms command in your asterisk configuration files.
Figure 1 - Asterisk integration with SMS Gateway
The ngsms module and Ozeki NG - SMS Gateway can be located on two different
computers. Often Ozeki NG and the GSM modem is installed on Windows XP and
Asterisk PBX with ngsms is running on a Linux box. When the Asterisk PBX
would like to send an SMS message, the ngsms
module will perform an HTTP request to Windows XP machine running Ozeki
NG - SMS Gateway and Ozeki NG will send the message through the attached
GSM Modem.
How to use
In this example Asterisk runs on Ubuntu Linux and Ozeki NG SMS
Gateway runs on Windows XP.
On Figure 3 you can see the IP address of the computer on which Ozeki NG SMS
Gateway runs. The IP address is 192.168.91.211
Figure 3 - IP address of the computer where Ozeki NG SMS Gateway runs
Start Terminal on Ubuntu Linux (Figure 4).
Figure 4 - Start Terminal on Ubuntu
If Terminal is launched install Asterisk with the following
command:
sudo apt-get install asterisk
Figure 5 - Install Asterisk
Create a directory with the name ozekisms with the
following command:
mkdir ozekisms
Figure 6 - Create ozekisms directory
Enter ozekisms directory
with the following
command:
cd ozekisms
Figure 7 - Enter ozekisms directory
Download ngsms.tgz:
et http://www.ozekisms.com/attachments/1/ngSMS.tgz
Figure 8 - Download ngsms.tgz
Extract the downloaded ngsms.tgz file:
tar -xzvf ngSMS.tgz
Figure 9 - Extract the file
Enter ngsms directory:
cd ngSMS
Figure 10 - Enter ngsms directory
In ngsms directory extract the file:
tar -xzvf libwww-perl-5.805.tar.gz
Figure 11 - Extract libwww-perl file
Enter libwww-perl directory:
cd libwww-perl-5.805
Figure 12 - Enter libwww-perl file
Type perl Makefile.PL (Figure 13):
perl Makefile.PL
Figure 13 - Perl Makefile.PL
Type make (Figure 14):
make
Figure 14 - Make
Type make test (Figure 15):
make test
Figure 15 - Make test
Type sudo make install (Figure 16). This command will compile
and install libwww-perl file:
sudo make install
Figure 16 - Compile and install libwww-perl
Move up one directory:
cd ..
Figure 17 - Move up one directory
Extract asterisk-perl complement:
tar -xzvf asterisk-perl-0.10.tar.gz
Figure 18 - Extract the complement
Enter the extracted directory:
cd asterisk-perl-0.10
Figure 19 - Enter the extracted directory
Type perl Makefile.PL (Figure 20):
perl Makefile.PL
Figure 20 - Perl Makefile.PL
Type make (Figure 21):
make
Figure 21 - Make
Type make test (Figure 22):
make test
Figure 22 - Make test
Compile and install Perl module for Asterisk
(Figure 23):
sudo make install
Figure 23 - Compile and extract file
Move up one directory (Figure 24):
cd ..
Figure 24 - Move up one directory
Create agi-bin directory in /usr/share/asterisk directory
(Figure 25):
sudo mkdir /usr/share/asterisk/agi-bin
Figure 25 - Create agi-bin directory
Copy ngsms Perl script into the created agi-bin directory under
the name of ngsms (Figure 26):
sudo cp ./ngsms /usr/share/asterisk/agi-bin/ngsms
Figure 26 - Copy ngsms script
Open ngsms Perl script to edit (Figure 27):
sudo nano /usr/share/asterisk/agi-bin/ngsms
Figure 27 - Edit ngsms Perl script
Specify the IP adress of the computer on which Ozeki NG SMS
Gateway runs at $smsgateway line. In our example the IP address is:
192.168.91.211 (Figure 28).
Figure 28 - Define the IP address of the computer where Ozeki NG SMS Gateway is installed
In our example there is a test_config directory on the desktop
that contains an extensions.conf and users.conf file (Figure 29).
Figure 29 - Test_config directory
In users.conf file there are two clients: oz850
and oz851 (Figure 30).
Figure 30 - Two clients are added
In our example there is a very basic rule defined: if client
oz851 is called, ngsms module will be issued and instead of telephone
calling, an SMS text message will be sent out (Figure 31):
exten => 850,1,Dial(SIP/oz850)
exten => 851,1,AGI(ngsms,+4412300000,This is a test message,+4412300012,,1)
Figure 31 - Ngsms module
AGI(ngsms,+4412300000,This is a test message,+4412300012,,1)
In this format the parameters should be read as follows:
ngsms
tells AGI to launch the ngsms
script
+4412300000
is the recipient phone number
This is a test message
is the message text.
You can use
variables in it.
+4412300012
is the sender phone number.
This can be a number or an alphanumeric string.
is the message type. This can
be any of the messagetypes below. Since it is blank the message type
will be text.
1
is the extra parameter. For example in a
voicemail indication this should contain
the number of messages in the mailbox.
Message types:
For text messages you do not have to specify a
messagetype
VOICEMAILON
Sets a voicemail indication on the cellphone.
The extra parameter contains the number of messages in the mailbox.
VOICEMAILOFF
Clears a voicemail indication on the cellphone.
The extra parameter should be set to 0.
FAXON
Sets a fax indication on the cellphone.
The extra parameter contains the number of messages in the mailbox.
FAXOFF
Clears a fax indication on the cellphone.
The extra parameter should be set to 0.
EMAILON
Sets an email indication on the cellphone.
The extra parameter contains the number of messages in the mailbox.
EMAILOFF
Clears an email indication on the cellphone.
The extra parameter should be set to 0.
VIDEOON
Sets a video message indication on the cellphone.
The extra parameter contains the number of messages in the mailbox.
VIDEOOFF
Clears a video message indication on the cellphone.
The extra parameter should be set to 0.
WEBLINK
Sends a webpage URL to the phone. This webpage can be opened in the phone
browser
with a simple click. The extra parameter should contain the URL starting
with http://
WEBBOOKMARK
Sends a webpage bookmark to the phone. This webpage bookmark will be stored in
the phone browser.
The extra parameter should contain the URL starting with http://
Now extensions.conf file needs to be copied from
test_config directory to /etc/asterisk directory (Figure 32):
Finally, Asterisk service needs to be restart (Figure 34):
sudo service asterisk restart
Figure 34 - Restart Asterisk
I simulated a test call: I called oz851 client and ngsms module
sends out the SMS message. You can see the sent message in Ozeki NG SMS Gateway
on Figure 35.
Figure 35 - Sent message
Highlights
Integrates well with Asterisk AGI architecture!
Provides an in-house solution. There is no need to subscribe for a service!
Works with all wireless networks in the world!
High capacity. Up to 500 SMS/second (on IPSMS connections)
Support for local and international recipient number formats
Dynamic sender number or (alphanumeric string)
International (Unicode) characters can be used in text messages
Support for long (multipart) messages
Message Waiting Indication Support, to enable
Voice mail waiting or Fax waiting indication on cellphones.
Download Asterisk SMS extension
ngSMS is a small module that you install on your Asterisk PBX.
It is a Perl script that uses the AGI interface. This module
makes it possible to use the ngSMS command in your configuration
files to send text messages.
exten=>115,55,AGI(ngsms|+4412300000|Bookmark www.ozekisms.com in your phone browser|+4412300012|WEBBOOKMARK|http://www.ozekisms.com)
How to set Voicemail indication on the cellphone
exten => 115,1,VoiceMail(${EXTEN}) exten => 115,55,AGI(ngsms|+4412300000|You have ${VMCOUNT(100)} messages|+4412300012|VOICEMAILON|${VMCOUNT(100)}) exten => 115,56,AGI(ngsms|+4412300000|You have a voicemail from ${CALLERID}. Message was recorded at ${DATETIME}|+4412300012) exten => 115,57,Hangup