ABTO Software VoIP Video SIP SDK 4.8
Description from the publisher
ABTO Software's VoIP Video SIP SDK for Windows is a solution to quickly build VoIP softphone that can dial and receive audio and video calls on your computer or add VoIP features into your software or web website. Our powerful and highly customizable VoIP client designed as ActiveX control and has wide range of features.
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Customizable sip softphone sample on the basis of ABTO Software VoIP SIP SDK