IVR VoIP SIP SDK - Version 1 ABTO Software offers IVR VoIP SIP SDK - customizable interactive voice response software solution that supports multiple lines and all features of our VoIP SIP SDK: * Support of all versions of Windows OS, including Windows 8 * Support of SIP, RTP, and SDP * STUN and other IETF standards (compatible with SER, OpenSER and Asterisk) * Encryption mode that accepts secure media * Support of ActiveX, COM, and plain dll files * Video support (H.263, H.264) * Multiple sip accounts registration (NEW) * Automatic selection of correct network interface (NEW) * IVR, presence, voice mail samples (NEW) * ICE support (NEW) * SIP Registrar (SIP server) support * DTMF (Dual Tone Multi Frequency) * SIP Proxy authentication