We released new version of VoIP SIP SDK for Windows. Recent changes list: 01/02/2013 241. Added code that reset RTP stream settings in decode when received packet with MARK. 05/02/2013 242. Improved video rendering. 25/02/2013 243. Added ability to reset … READ MORE

ABTO Software is proud to announce release of IVR VoIP SIP SDK – customizable interactive voice response software solution on the basis of winning ABTO Software’s VoIP SIP SDK. IVR VoIP SIP SDK supports multiple lines and all features of … READ MORE

We released new version 4.6 of VoIP SIP SDK. Recent changes list: 234. Added new functionality to prevent lost DTMF: a. Default payload type for DTMF codec is set to 101, instead of 99. b. Added code that checks is … READ MORE

We added a new section on our website – Subproducts. You are welcome to visit new pages and evaluate our custom solutions.

We released new version of VoIP SIP SDK. Recent changes list: 07/12/2012 Added new method IAbtoPhone::StartSendingNoise(LONG Tone1AmpPromille, LONG Tone2AmpPromille, LONG IntervalMs, LONG FrequencyHz) Modified handling early media in cases when remote side generates different values for field ‘Tag’ in header ‘To’ … READ MORE

Attention: www. voip-sip-sdk. com is not our website. Some customers ask us whether www voip-sip-sdk com is our website. The answer is no. After long time that we have used www.voipsipsdk.com, other company made the mentioned website, but it has … READ MORE

In order to satisfy our customers that require using more than 8 lines per sample, ABTOSoftware developed a version with unlimited number of lines. So now you can use only one sample to make multiple call dialer that makes a … READ MORE

Please download our latest SDK. If you are our customer you can use the same download link as before. Have a look at our changes list: 10/09/2012 210. Fixed registration bug when used single sip account. 211. Fixed bug with … READ MORE

Please download the latest version of our VoIP SIP SDK. List of latest changes: 10/09/2012 210. Fixed registration bug when used single sip account 211. Fixed bug with setting bridge mixer weights on short video calls 12/09/2012 212. Fixed log … READ MORE