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OZEKI NG SMS Gateway - Product Guide

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Automated phone calls?
Ozeki Phone System XE VoIP PBX software is an advanced PBX built for automated voice calls and 2 way SMS messaging. It has outstanding APIs for software developers. It can be used for:

Phone calls from SQL
Phone calls from HTTP
Voice and SMS applications

Callcenter developers
If you are working on telephone solutions, please check out the Ozeki VoIP SIP SDK.
It can be used to create VoIP client and server software.

Contact Us!
If you wish to get further information, do not hesitate to contact us!

E-mail: info@ozekisms.com

If you have a technical question, please submit a support request on-line.

How to make voice calls with Ozeki NG

Voice call support in Ozeki NG SMS Gateway makes it possible for your system to dial telephone numbers and make voice telephone calls. During the calls the system can play in previously recorded audio or it can read out text using the built in text to speech engine. With the new voice call feature of Ozeki NG you can send information to your customers, employees or suppliers automatically and you can get their attention more efficiently than by sending a text message. In some cases this will bring great benefits to your business. This page provides detailed instructions on how to install and configure voice call support in Ozeki NG - SMS Gateway.

UPGRADE YOUR SYSTEM to support voice calls
The standard Ozeki NG SMS Gateway license supports SMS and MMS messages. To be able to use voice calls, you need to purchase the voice call addon!

Purchase the Voice Call Addon for Ozeki NG SMS Gateway now!

Step 1: Enable voice call support in Ozeki NG SMS Gateway

If you are evaluating Ozeki NG SMS Gateway you can test voice call support immediately, because this features is enabled in the trial version by default. When you purchase a license, you should purchase a standard Ozeki NG SMS Gateway license, plus you shold purchase the Voice Call Addon for Ozeki NG SMS Gateway. (When you purchase the Voice Call Addon, you will receive a new license code that unlocks the voice features.)

Step 2: Connect your system to the telephone network

To make voice calls, you need to connect your Ozeki NG SMS Gateway system to the telephone network. This can be done in three ways:

Option #1: You can use a VoIP telephone adapter.

A VoIP telephone adapter is a hardware device that can be connected to your ethernet LAN or to your computer. It makes it possible for Ozeki NG SMS Gateway running on your computer to dial telephone calls. There are VoIP telephone adapters for GSM lines, for standard analog telephone lines and for ISDN lines. (If you don't have a VoIP telephone adapter, you can order one directly from us). When you put this hardware on your Ethernet LAN, it will receive an IP address. You need to configure this IP address in Ozeki NG SMS Gateway to be able to make voice telephone calls through the device.

Click here to see a video on how to connect a VoIP telephone adapter to your ethernet network.

Figure 1/a. - Connect to the telephone network
using a VoIP telephone adapter

Option #2: You can use a SIP Account provided by Internet based VoIP telephone provider.

VoIP telephone service providers offer a telephone service over the Internet. They can forward calls to traditional telephone networks and to Internet users signed up to their network. There are many VoIP telephone service providers out there. When you sign up for their service, you will receive a SIP account (an IP address, a username and a password, plus some other details). To make voice calls from Ozeki NG SMS Gateway, you need to configure the SIP account details in the administration screen.

Figure 1/b. - Connect to the telephone network
using a VoIP service provider

Option #3: You can use your existing office PBX if it is a VoIP system.

If your office has an IP telephone system, you can connect Ozeki NG SMS Gateway to it through the office LAN. Ozeki NG can log in with a SIP account to the PBX and it can make telephone calls just like any other office desktop phone would. This is a good choice if you have already invested in IP telephony, because in this case you don't need to have a dedicated telephone line for outbound voice telephone calls made from Ozeki NG SMS Gateway.

Figure 1/c. - Connect to the telephone network
through your office PBX

Step 3: Configure the Voice call feature of Ozeki NG SMS Gateway

Once you have decided which option to use to connect to the telphone network you are ready to configure Ozeki NG SMS Gateway to make voice calls. The Ozeki NG Voice call features is based on the SIP Voice over IP protocol (VOIP). To be able to make voice calls, you need to login as admin and install a "VoIP Autodialer" service provider connection on the graphical user interace of the software. This service provider connection can be installed just like any other service provider connection.

Video tutorial: VoIP service provider installation

To start installing and configuring a VoIP connection click on 'Add service provider' item in the 'Service providers' menu (Figure 2). After clicking, the 'Add service provider' panel will show up on the right hand side of the screen.

To install the connection, click the 'Install' link next to VoIP Autodialer section in the list (Figure 2).

Figure 2 - Install VoIP Autodialer connection

When you have installed the connection, a configuration form will show up on the interface. Here you can configure your connection settings. If you are using an VoIP telephone adapter, you need to add it's IP address and port number.

If you are using a SIP account provided by your Internet Voip service provider or you office IP PBX administrator, you need to add your User ID, Display name, Domain Server, Register name and password (Figure 3). A SIP account enables you to connect Ozeki NG SMS Gateway to the IP telephone service.

Figure 3 - Connection settings

By clicking on 'Advanced' tab you can set the Local IP Address and SIP port (Figure 4). If you are unsure, you can safely use the deafult options. By clicking on 'OK' you can save your settings.

First enter the IP address of the PC on which Ozeki NG SMS Gateway is running.
Next specify the port at which SIP messages will be received.
Then specify the port range for making calls.

In Firewall Traversal section you can enable Use local IP address option is Ozeki NG SMS Gateway and the PBX are on the same network. If Ozeki NG SMS Gateway is behind NAT against the PBX you can select Discover public IP address (STUN) option.

Finally, in STUN/TURN server settings section you can enter the server address, your username and password.

Figure 4 - Advanced settings

Step 4: Test the connection

Record an audio message

In order to send a voice message, you need to create a .wav file, which will contain your audio message. Open 'Sound recorder' (Figure 5) from the All programs/Accessories/Entertainment section of the Windows start menu. (Please note that you can record your audio message with any sound recording program, not just Sound Recorder, and you can also use any edited sound.)

Figure 5 - Sound recorder

After you recorded your message, save it by clicking on 'File' menu's 'Save as' menuitem in the Sound recorder (Figure 6). Choose where you would like to save your voice message on your computer. We recommend you to use PCM, 8 Khz, 8 bit, mono format when you save the wav file.

Figure 6 - Saving recorded voice message

Send the previously recorded audio message

To send the recorded wav file, you need to create a new message in Ozeki NG SMS Gateway. You can do this by clicking on the 'Compose' icon in the toolbar. In the message composer form please select the AUDIO:WAV message type, then add the phone numbers you wish to call, and enter the file name.

Please note, that when you specify a phone number, you need to use the same telephone phone number format you would use when you would dial the recipient from the standard handset. For most voice telephone networks the '+' sign prefix is invalid.

Figure 7 - Composing an AUDIO:WAV message

Try to send a text to speech message

If you would like to test the text to speech converter, you need to use the AUDIO:TEXT message format. To send an AUDIO:TEXT message, simply type your message in the 'Message text' section (Figure 8). Your message will be read to the recipient by the built in Text-to-speech converter.

Figure 8 - Creating an AUDIO:TEXT message

By clicking on 'OK' you can send your message. In the main window, you will see 'Message accepted for delivery' (Figure 9).

Figure 9 - Message accepted for delivery


To sum it up, once you have configure a voice telephone network connection, you can send audio messages with Ozeki NG - SMS Gateway in a very simple way. The Ozeki software will dial the telephone numbers one by one and will play in the audio once the call is picked up. This is a very convenient way to make automated telephone calls.

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