http://ipphonesdk.com

You don't have to experience on so many Telecom and Internet protocols and concepts. The SIP SDK has integrated everything for you. STOP Struggling in SIP messages, call status, and multi-threadings. This pure OOP designed SIP SDK will let you focus on your business logic.

This SDK is a pure Host Media Process(HMP) engine. It allows you to develop VoIP application without any hardware(boards). If you are a IVR or CTI developer, and trying to migrate your board application to boardless, our SDK is your best choice.

VoIP SDK built on open standards, leveraging SIP (Session Initiation Protocol) to create, run and terminate multi- media sessions. They are built on popular codecs for voice and video (include G.711, G.722.1, G.723.1, G.729(b), GSM, iLBC, SPEEX(WB), AMR-WB, H.263, H.263-1998 and H.264), and the SIP SIMPLE standard for Instant Messaging and Presence.