Billion Softswitch VoIP SIP/H323 proxy server for Windows, Linux, FreeBSD. Billion Softswitch is a software system for intellectual proxy of signaling and media streams in the VoIP-networks based on SIP and H.323 protocols.
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.
