Softphone SDK, SIP SDK, VOIP SDK, Softphone, IVR SDK, IMS SDK 1.3 screenshot Softphone SDK, SIP SDK, VOIP SDK, Softphone, IVR SDK, IMS SDK. Our SIP SDK 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. Download Softphone SDK, SIP SDK, VOIP SDK, Softphone, IVR SDK, IMS SDK 1.3
