Quick Start Guide

This guide explains how to integrate Ozeki VoIP SIP SDK quickly in your application to boost its functionality. The information below help you start using the SDK right after download. You will get a basic scope about the possibilities of using Ozeki VoIP SIP SDK and about the solutions you can build with it.


Ozeki VoIP SIP SDK is an excellent software development kit that allows you to establish VoIP calls from your application easily and quickly. You do not need to have expert programming skills, with the most basic programming knowledge you will be able to create extraordinary VoIP solutions with this tool. After download you just integrate Ozeki VoIP SIP SDK into your application and it is ready to make VoIP calls immediately.

This guide will show how you can start to use Ozeki VoIP SIP SDK and it will give you tips about the VoIP solutions you can write with the support of this SDK. After reading this article you will be familiar with your possibilities and you will be able to decide, which VoIP solution you need in order to make your company work more effective and profitable.

At first, you will get the basic information about the requirements and the configuration of the SDK, then the guide will give you a description about the VoIP solutions you can implement using this SDK. If any solution catches your attention, this guide shows which of the pages will give you more detailed information about the given topic.

First of all, you will need to know the exact environment you will need to set up for working with this SDK. You will learn about the requirements of the SDK in the next section.


Ozeki VoIP SIP SDK is basically a .NET solution so, you will need to have the development environment and background tools for .NET to be able to use the SDK. The basic developer requirements are shown in Figure 1.

basic requirements for creating your own voip solution
Figure 1 - Basic requirements for creating your own VoIP solution

The following list shows all the requirements you will need if you want to build a VoIP solution with Ozeki VoIP SIP SDK.

  • PC (Windows 11, Windows 10, Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, Windows 8, Windows 7 operating system)
  • .Net compatible development kit (e.g. Visual Studio 2019)
  • Minimum .Net 3.5 SP1
  • Ozeki VoIP SIP SDK

Note that you may also need a SIP account from your service provider in case of some VoIP solutions. You can find more information about this topic in the sections and articles about the given solutions.

Download and install Ozeki VoIP SIP SDK

You can download and use the free trial version of Ozeki VoIP SIP SDK using the link below. The trial version has some limitations but you can try all the functionalities of the SDK with the trial. If you have decided to build a more professional VoIP Solution, you can choose from the wide selection of licenses and buy the SDK with the exact functionalities you want to use.

Download VoIP SIP SDK

The first thing to do if you wish to work with Ozeki VoIP SIP SDK, is to download and install it on your Windows computer. Once installed, you can use Visual Studio to add Voice and Video call capabilities to your project.

Link: Download Voip SIP SDK for Windows

After downloading Ozeki VoIP SIP SDK, you will need to install it to your computer. The installation wizard will lead you through this process. You can change some basic settings during the installation, like the target folder but you can also install the SDK without any modifications.

It is essential to know that if you installed the SDK into a different folder than the default, you will find the .dll to be registered to your programs in that folder.

Getting started

Under the Developers Guide, you can find detailed documentation and example codes to help you understand Ozeki VoIP SIP SDK better. If you are new to this system, it is highly recommended that you start with the Basic Examples.

Solutions you can build

The solutions you can make with Ozeki VoIP SIP SDK are of a great variation depending on your actual needs and possibilities. VoIP communication can grant you free communication as well as easy access of the Public Social Telephone Network (PSTN), but in that case you will need to pay the local fees.

When choosing a VoIP application, you need to decide the exact purpose. There is a possibility to build a window application, you can create embedded solutions for your webpage or you can even make some professional solutions like Interactive Voice Response system or a Call center. You also have the possibility to record the media streams.


The software phone or softphone is a VoIP solution that is capable for audio or video communication via Session Initiation Protocol. This is made through a PBX that handles the SIP accounts for the call. The PBX is a software or a hardware that makes the connection between the softphone programs, and for this purpose it uses the so-called SIP accounts.

To learn more about softphone technology and try some softphone examples, please visit Softphone Development pages ►


The private branch exchange is a professional VoIP telephone system. With the extraordinary support of Ozeki VoIP SDK you will be able to implement your own PBX easily. You can start with a simple solution and extend it with more advanced features to gain the best solution for your purposes.

Please read through the PBX developers guide articles to find how Ozeki VoIP SDK can help you to reach your aims. ►


If you want to make your corporate communication more effective, you can use a webphone. The webphone is a web page embedded program that can be connected to your customer service center so your customers can reach you during visiting your website.

For further information about webphone technology and webphone examples, please go to Webphone technology pages ►

Call center

Call centers are professional VoIP solutions that can make your company work effective by centralizing the corporate communication. This solution can be fully realized with software solutions or you can attach your VoIP programs to your already existing hardware telephone network.

To learn how you can develop your own call center with Ozeki SIP SDK, please check Call Center Development pages ►


Interactive voice response (IVR) is a technology that allows a computer to interact with humans through the use of voice and DTMF keypad inputs. This means that your customer presses the telephone buttons and your IVR system reacts according to the pressed button. This solution is really useful when you want to build a tree-like telephone menu system.

For detailed information about IVR technology and for finding useful IVR examples, please visit IVR Development pages ►

Mobile technologies

Ozeki VoIP SDK provides revolutionary technology for integrating the newest mobile solutions into your VoIP communication network. It is easy to build VoIP applications for mobile devices regardless of the mobile operating system with Ozeki SDK. Use an Apple device, an Android smartphone or tablet or a Windows Phone 7 hardware, you will find solution for the VoIP programming with Ozeki VoIP SDK.

Please check the Mobile phones and platforms for more information ►


To introduce a really effective VoIP solution into your application with Ozeki VoIP SIP SDK, you only need to follow some simple configuration steps. Without any special knowledge for SIP you can instantly and easily experience the benefits of VoIP technology with Ozeki VoIP SDK! If you are a .Net VoIP developer, this is the ultimate choice for you. After download you can start to create a softphones in minutes or you can build SIP VoIP call services easily and quickly.

If you have any question do not hesitate to contact us at: info@voip-sip-sdk.com

Related Pages