Provides softphone capabilities with SIP interface.
ABTO Software VoIP SIP SDK for Windows provides capabilities to build a custom SIP softphone. This softphone will be able to support multiple line voice/video calls and video conference, IM chat, multiple SIP accounts, presence, and voice mail, alternately you could add VoIP features to your custom IVR/intercom/CRM software. The pricing structure is simple and straightforward. There are no per seat licensing. You just pay a one-time fee. The trial software also offers a full-fledged SDK to help try out the development features. It is compatible with the Windows operating system and support exists for versions right up to Windows 8.1. Development support available covers program development in C#, C++, VB.NET, VB 6.0, and Delphi. You would be able to develop program that can accommodate ActiveX, COM, and plain DLL files. SIP DLL support is included. NAT (Network Address Translation) support is available too.
DTMF signaling is available. SIP authentication as well as encryption on the basis of sRTP, DLS, and DTLS is provided. Log file management functions are provided. This tool supports a wide range of codecs. These include 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 and GSM, etc. Support is available for different kinds of Internet connections. It is possible to support multiple lines and multiple SIP accounts can be supported too. Features like multi-party voice conference, SIP Registrar support (compatibility with most of SIP servers including Asterisk) and working under firewall are available. Various noise reduction features are available. Calls can be held and retrieved, forwarded and transferred. This is a very good product.