Billion PBX - new generation phone system working in IP-networks using SIP protocol. Billion PBX provides not only voice calls but also a whole range of additional features like call forwarding, voicemail, callback and many others.
You will rethink the industry standard VOIP benefits by using this featured SIP softphone. SIP is better than you may think! Stay connected with multiple SIP service providers to maximize your revenue.
You will rethink the industry standard VOIP benefits by using this featured SIP softphone. SIP is better than you may think! Stay connected with multiple SIP service providers to maximize your revenue.
VaxVoIP SIP Server SDK is a new, flexible approach that combines several advanced features, enabling users to create their own VoIP Server and IP PBX systems
HsVoipSDK is an audio streaming / voice over IP SDK in C / C++. HsVoipSDK is shipped with full C source code and includes the Audio library, RTP protocol library and Socket interface library for Windows.
Free VOIP / SIP phone (softphone). Use your PC as a phone. Works with any SIP / VOIP provider and phone service. Easy to use interface to transfer, forward calls or review history of calls. Free download from http://www.3cx.com
Carousel is software to connect VoIP calls to ordinary telephone lines and vice versa using one of a number of professional telephony devices. It works as a virtual FXO gateway.