Features of VoIP SIP SDK

Support of SIP, RTP, and SDP
STUN and other IETF standards (compatible with SER, OpenSER and Asterisk)
All versions of Windows OS
Multiple sip accounts registration (NEW)
IVR, presence, voice mail samples (NEW)
ICE support (NEW)
Support of SIP, RTP, and SDP
STUN and other IETF standards (compatible with SER, OpenSER and Asterisk)
VoIP SDK ActiveX, COM, and plain dll files support
SIP Registrar (SIP server) support
Encryption on the basis of sRTP, DLS, and DTLS
Auto gain controller (AGC)
Adaptive silence detection
Adaptive jitter buffer
DTMF (Dual Tone Multi Frequency)
SIP Proxy authentication
Support of calls: Hold/Retrieve Call, Forward Call (Blind Call Transfer), Transfer Call (Attended Transfer)
Software volume control
Record conversation into file
Playback of WAV files into conversation
IM interface
Multi-party voice conference
Multiline support
Noise reduction
Adaptive silence detection
Mute Sound
Support of Virtual Private Network (VPN)
Noise reduction (supression)
Media status support
Getting of used codec per line
Custom ringtone support (wav format)
Redirection of calls to other phone lines
Configuration saving and loading
TCP support
Selecting of media input and output devices
Auto-answer
Log file on/off setting
NAT and firewall support
Support of all kinds of Internet connections
Prepared samples for programming languages (C#, C++, VB.NET, VB 6.0 and Delphi)
IVR, call center, dialer ready
SIP camera
Call history and address book ready
Royalty free licensing
No yearly/monthly fee

Available codecs:

If you need video call support please proceed to Video VoIP SIP SDK features.

Thank you