Ozeki VoIP SDK supports peer to peer VoIP SIP phone calls. The description of this method
can be found here.
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.
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
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.
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
Trial version can be easily upgraded with your purchased license to full version without any uninstallation.
Read more here.
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.
Ozeki VoIP SDK datasheet containing all the information related to the
Ozeki VoIP SIP SDK product can be found here.
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.