The Ozeki VoIP SIP SDK for .Net is a software development kit that enables you to make VoIP calls using SIP protocol from your application. The component is available at http://www.voip-sip-sdk.com
For a step by step configuration guide for setting up Ozeki VoIP SIP SDK with SureVoIP please check: http://www.voip-sip-sdk.com/p_55-how-to-configure-ozeki-voip-sip-sdk-with-surevoip-voip.html
The demo version of Ozeki VoIP SIP SDK can be downloaded from http://www.voip-sip-sdk.com/index.php?owpn=21 to test functionality.
For more details please contact Ozeki at http://www.voip-sip-sdk.com/p_16-ozeki-informatics-ltd-contact-infomation-voip.html.