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SIP tester is a free VoIP load testing tool which enables you to test VoIP network, SIP software or hardware. It is able to simulate thousands of simultaneous incoming and outgoing SIP calls with RTP media, analyze call quality in real time.

VoIP H.323 SDK A powerful and highly versatile VoIP SDK to accelerate development of H.323 applications and websites. Lost no time and start a massive jump in development and a couple of new customers. Enjoy!

SIP DLL - A powerful and highly versatile VoIP SDK. Our SIP DLL provides a powerful and highly versatile solution to add quickly SIP (Session Initiation Protocol) based dial and receive phone calls features in your software applications.