- Introduction
- VoIP Technology
- Ozeki VoIP SDK
- Developers Guide
- Tutorial
- Softphone Development
- PBX Development
- Simple VoIP PBX
- VoIP PBX authentication
- Dial Plan
- Voicemail
- MediaGateway connection
- Interactive Voice Response
- Building PBX cluster
- Call queue
- Advanced Call queue
- Call queue with routing
- Video 1 - Simple VoIP PBX
- Video 2 - SIP authentication
- Video 3 - Advanced tasks
- IVR Development
- Appendix
- FAQ
Ozeki brings you outstanding
SMS Gateway technology. Use our SMS Server products on Windows,Linux, or Android
C# SMS API
Developers can use our C# SMS API to send SMS from C#.Net. The C# SMS API comes with full source code
PHP SMS API
The ozeki PHP SMS gateway software can be used to send SMS from PHP and to receive SMS usig PHP on your website
SMPP SMS Gateway
SMS service providers use our SMPP gateway solution, that offers a high performance SMPP server and SMPP client gateway with amazing routing capabilities

How to build a PBX with Ozeki VoIP SIP SDK
Simple VoIP PBX
This guide demonstrates all the initial steps concerning to how create a SIP PBX by using Ozeki VoIP SIP SDK. Start now
VoIP PBX authentication
The next step is the PBX registration and the SIP authentication. Find out how to conduct these in your own PBX. Start now
Dial plan
This article explains how to define routing rules in order to setup automated call forwarding to make your system more effective. Start now
Interactive Voice Response
From this guide you can learn how to create Interactive Voice Response module as virtual extension for your PBX. Start now
Building PBX cluster
You can learn how to build a PBX cluster to have a redundant VoIP system and to be prepared for hardware failures. Start now
Call queue
In order to be able to accept a huge amount of simultaneous calls it is recommended to setup call queue. This guide show how. Start now
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