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Developers Guide

Welcome to the Ozeki VoIP SIP SDK Developers Guide! This guide offers practical and detailed introduction and documentation for developing VoIP applications (softphones, webphones, Flash solutions, etc.) using Ozeki VoIP SIP SDK. Ozeki SIP SDK saves you a great deal of time and effort during development. This guide explores the concepts behind VoIP, the framework for constructing an application and the tools for developing.

The Developers Guide includes overall documentation for VoIP app development. For API specifications, please visit the API Reference Book page.

Select the preferred VoIP application:
Softphone | Webphone | IP Cameras | Voice recorder | IVR | PBX | Call center | VoIP CRM integration | Alert systems | Mobile development | Billing



IP Cameras


Voice recorder


VoIP CRM integration

Alert systems

Call center

Mobile phones and platforms


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