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Features

Softphone, webphone development

Learn about how you can create high quality VoIP SIP phone applications (SIP softphone or webphone) easily with Ozeki VoIP SDK.

VoIP SIP PBX development

Learn about how you can create a reliable, high performance VoIP SIP PBX system with Ozeki VoIP SDK.

Callcenter & CRM development

Learn about how you can create your own callcenter or CRM solution for your business' needs with Ozeki VoIP SDK.

Mobile development

Learn about how you can create your own VoIP SIP phone application for tablet PCs, smartphones or other portable devices with Ozeki VoIP SDK.

Prerequisites for this VoIP SIP software
  • OS:Windows 11,10,8,7,Vista,20xx,XP
  • Visual Studio 2015, 2013, 2010, 2008
  • .NET Framework 4.5.2 or newer
  • 1 GHz CPU
  • 1 GB RAM
  • 200 MB free disk space
Outstanding compatibility

1

Supported Protocols

Protocols supported by Ozeki VoIP SIP SDK:

3

Supported codecs

Codecs supported by Ozeki VoIP SIP SDK:

Specifications

Telephony features

Ozeki VoIP SDK supports all the basic and advanced telephony features, full list of them can be found here.

Supported codecs

Ozeki VoIP SDK supports all the codecs used in VoIP communications. List of the codecs can be found here.

Audio features

Ozeki VoIP SDK has extended audio features to ensure high voice quality for your VoIP SIP phone calls. These features' list can be found here.

Video features

Ozeki VoIP SDK has extended video features to ensure video quality. These features' list can be found here.

Tools provided by this VoIP SIP software
Supported VoIP service providers

Ozeki VoIP SDK is compatible with a wide range of VoIP service providers. Step-by-step configuration guides can be found here:

Peer to peer calls

Ozeki VoIP SDK supports peer to peer VoIP SIP phone calls. The description of this method can be found here.

Trial version

1

Download and install the demo version of Ozeki VoIP SIP SDK to test its functions. The demo comes with 56 VoIP SIP example projects which lets you evaluate and understand the use of this VoIP SIP software's functionalities.

2

The demo version has no limitations in the number of simultaneous VoIP SIP phone calls. After the 4th call, one of every four calls plays a demo notification message. Another limitation is the time limit of 20 days for evaluation

3

The trial version comes with a fully-functional SIP softphone demo program. It can be used and redistributed for free. Feel free to download and modify the SIP softphone's source code.

4

You only need to buy the software license once, optional technical support and version update service is available later. You can request a quotation here. You can also find our FAQ on licensing here.

5

Trial version can be easily upgraded with your purchased license to full version without any uninstallation. Read more here.

Documentation

On-line manual

You can find articles about VoIP technology and VoIP development with Ozeki VoIP SIP SDK here. Learn how to make VoIP SIP phone calls easily.

On-line API documentation

The Ozeki VoIP SIP class library documentation can be found here describing all the tools you can use in your application.

Product datasheet

Ozeki VoIP SDK datasheet containing all the information related to the Ozeki VoIP SIP SDK product can be found here.

Download information

Information about the latest versions of this VoIP SIP software can be found here. Download it and make your first VoIP SIP phone call now.

Supported RFCs

Ozeki VoIP SIP SDK implements the following standards:

Example projects

SIP softphone examples

Basic VoIP SIP softphone

This demo shows how you can develop a simple SIP softphone for audio VoIP SIP phone calls easily.

SIP Registration

This demo show how to create a console application SIP softphone, which is able to register to a PBX.

Many simultaneous VoIP SIP phone calls

This demo shows how you can control multiple simultaneous calls with your SIP softphone.

Advanced SIP softphone features

These demos shows the usage of the advanced SIP softphone features provided by Ozeki VoIP SDK.

Automated dialing & call status handling

This demo shows how you can develop a SIP softphone with automated dialing and call status handling.

PBX, Call center, IVR codes

A simple VoIP SIP PBX

This demo shows how you can develop a simple PBX system with the basic features.

An advanced VoIP SIP PBX

This demo shows how you can develop a more complex PBX system with advanced features.

A simple call center server

This demo shows how to create a simple call center server with simple call distribution.

An advanced call center server

This demo shows how to create an advanced call center server with a more complex call distribution algorithm.

An IVR system

This demo shows how you can create an IVR (interactive voice response) system with Ozeki VoIP SIP SDK.

Webphone & Mobile codes

Adobe Flash webphone

This demo shows how you can create an Adobe Flash webphone with Ozeki VoIP SIP SDK.

Silverlight webphone

This demo shows how you can create a Silverlight webphone with Ozeki VoIP SIP SDK.

Android VoIP SIP example

This demo shows how you can develop your own VoIP application for Android clients.

iPhone & iPad VoIP SIP example

This demo shows how you can develop your own VoIP application for iPhone or iPad (iOS) clients.

Windows mobile VoIP SIP example

This demo shows how you can develop your own VoIP application for Windows Mobile clients.

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