How to setup Ozeki VoIP SIP SDK with OpenSIPS

This guide demonstrates how you can connect Ozeki VoIP SIP SDK to your OpenSIPS PBX. You can also read about how to test Ozeki VoIP SIP SDK in order to build your own applications.

VoIP technology is one of the fastest growing technology today. With VoIP technology you can use your existing network architecture to place phone calls over the internet. Ozeki VoIP SIP SDK uses VoIP technology to enable voice messaging in your application.

In order to build your own application and start calling your contacts, you can connect Ozeki VoIP SIP SDK to your OpenSIPS PBX. You can read about the configuration steps in this guide.

System architecture

If you follow the configuration steps of this guide, you will have a telephone system that works as follows:
As a first step, you need to create an extension in OpenSIPS PBX. Ozeki VoIP SIP SDK will connect to OpenSIPS through this extension. Once Ozeki VoIP SIP SDK is connected, you can start calling your contacts. The destination phone could be a VoIP-based phone, a regular phone or a mobile phone. Figure 1 demonstrates the process.

connecting to opensips
Figure 1 - Connecting to OpenSIPS

The configuration steps will be the follows:

  1. Ozeki VoIP SIP SDK registers to OpenSIPS PBX.
  2. Once you start your call, it will be forwarded to OpenSIPS PBX using the created extension.
  3. The destination phone will be ringing.


Before you start to configure this solution, it is assumed that you have already installed your OpenSIPS PBX on your Linux server, and downloaded Ozeki VoIP SIP SDK from the download page.

1.) Configure OpenSIPS

As a first step, you need to configure your OpenSIPS PBX and create an extension for Ozeki VoIP SIP SDK.

I have already installed OpenSIPS PBX in a Linux distribution which IP address is Open a browser and navigate to OpenSIPS web interface. In this example it will be:

Once you are at the login page, login as administrator (Figure 2).

login as administrator
Figure 2 - Login as administrator

After you logged in, open the Users dropdown menu and click on User Management (Figure 3).

click on user management
Figure 3 - Click on User Management

This will lead you to the Users page. Click on Add New to add a new user to your OpenSIPS PBX (Figure 4).

add a new user
Figure 4 - Add a new user

Provide the username, the e-mail address, and a password in the respective fields, and click on Register (Figure 5).

register a new user
Figure 5 - Register a new user

I have created two users in OpenSIPS PBX: user 100 and user 101. Ozeki VoIP SIP SDK will register as user 101, and a VoIP phone will be registered as user 100. You can see the created users in Figure 6.

created users
Figure 6 - Created users

Now the configuration of OpenSIPS PBX is done and you can start to configure Ozeki VoIP SIP SDK.

2.) Configure Ozeki VoIP SIP SDK

In this demonstration, I have already downloaded Ozeki VoIP SIP SDK into my computer. Open the downloaded package and execute the installer. Accept the license agreement and click on Next (Figure 7).

accept the license agreement
Figure 7 - Accept the license agreement

Wait until Ozeki VoIP SIP SDK is installed (Figure 8).

ozeki voip sip sdk is installing
Figure 8 - Ozeki VoIP SIP SDK is installing

Once it is installed, the Ozeki VoIP SIP SDK demo Application will start automatically. Provide the extension details to the SIP Account Settings tab, enter the IP address of the OpenSIPS PBX, and click on Register (Figure 9).

click on register
Figure 9 - Click on Register

At the Phone Lines section you can see the registered phone line. To dial an extension, enter the phone number using the softphone's keyboard, and click on Pick up (Figure 10).

dial an extension
Figure 10 - Dial an extension

As you can see there is an incoming call at the destination phone from Ozeki VoIP SIP SDK (Figure 11).

incoming call from ozeki voip sip sdk
Figure 11 - Incoming call from Ozeki VoIP SIP SDK

In the demo application the active phone call is visible in the Phone Calls section (Figure 12).

active phone call
Figure 12 - Active phone call


Now the configuration is complete, and the testing is successful and you can start to build your application with VoIP support. You can reach in a more efficient way using a VoIP system.

If you have any questions, do not hesitate to contact us:

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