VoIP SIP SDK for Windows

ABTO Software VoIP SIP SDK for Windows provides capabilities to build a custom SIP softphone with voice and video calls support or add VoIP features to your software. VoIP SIP SDK has four versions: Standard VoIP SIP SDK, VoIP Video SIP SDK, Multiline VoIP SIP SDK, and VoIP Conference SIP SDK. The limitation of full functional trial SDK is 10 day evaluation period.

License Details

  • No yearly/monthly fee
  • No limitation for number of users, channels, or products

Protocols Support

  • SIP (Session Initiation Protocol)
  • RTP (Real-time Transport Protocol)
  • SDP (Session Description Protocol)
  • TCP (Transmission Control Protocol) /UDP (User Datagram Protocol)
  • STUN (Session Traversal Utilities for NAT)
  • ICE (Interactive Connectivity Establishment)

Development Features

  • ActiveX, COM, and plain dll files
  • support of SIP DLL SDK (via native dll interface)
  • NAT (Network Address Translation)  support
  • Encryption on the basis of sRTP, DLS, and DTLS
  • DTMF (Dual Tone Multi Frequency) support
  • SIP Authentication
  • Codecs management
  • Basic samples (C#, C++, VB.NET, VB 6.0, and Delphi)
  • Custom samples (multiple SIP accounts, IVR, presence, and voice mail)
  • Log file on/off setting

End User Features

  • All versions of Windows OS, including Windows 8.1 and 64 bit systems
  • Support of all kinds of Internet connections
  • SIP Registrar support (compatibility with most of SIP servers including Asterisk)
  • Works under firewall
  • Multiple sip accounts registration
  • Multiline support
  • Multi-party voice conference
  • Video call support
  • IM interface
  • Selecting of media input and output devices
  • Custom ringtone support
  • Configuration saving and loading

Conversation Specific Features

  • Calls operations:

- Hold/Retrieve Call
- Forward Call (Blind Call Transfer)
- Transfer Call (Attended Transfer)

  • Noise reduction (supression)

- AGC (Auto gain controller) support
- Adaptive silence detection
- Adaptive jitter buffer

  • Software volume control (including Mute Sound)
  • Playing file into conversation
  • Recording conversation into file
  • Redirection of calls to other phone lines
  • Call history and address book ready

Available Codecs

  • H.263
  • H.264
  • G.711 (ALaw, muLaw)
  • G.726 (16k 24k 32k 40k)
  • G.729A
  • G.723
  • iLBC
  • LPC-10
  • Speex (Narrow, Wide)
  • L16
  • RFC4733 DTMF tones
  • GSM

Questions?

Development Environments:

  • Visual C++ / C++ / C# .NET
  • VB.NET / VB 6.0
  • Java
  • JavaScript / HTML / HTML5
  • Flash
  • Borland Delphi

Company details:

ABTO Software is the only owner and distributor of VoIP SIP SDK. The company also develops other products and offers software development services. Read more on www.abtosoftware.com.