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FreeSWITCH is a free and open-source telephony software for real-time communication protocols using audio, video, text and other forms of media. The software has applications in WebRTC, voice over Internet Protocol (VoIP), video transcoding, Multipoint Control Unit (MCU) functionality and supports Session Initiation Protocol (SIP) features.
Dialexia VoIP Softswitches, IP PBX for medium and enterprise organizations, billing servers. IBM WebSphere Application Server - Converged HTTP and SIP container JEE Application Server; Interactive Intelligence Windows-based IP PBX for small, medium and enterprise organizations; Kerio Operator, IP PBX for small and medium enterprises
EMS-1 (The ITEC Electronic Modular Switch is an electronic direct control switching system. The modules are combined to form a complete switch or any of the modules can be added to your present Step-by-Step Systems.) EMS-2 (The EMS-2 RURAL SWITCH is a stored program control analog switch designed to be cost-effective in small exchanges.
3CX, Inc., is a software development company and developer of the 3CX Phone System. The 3CX Phone System is a software private branch exchange based on the SIP (Session Initiation Protocol) standard to allow calls via the public switched telephone network (PSTN) or via Voice over Internet Protocol (VoIP) services.
Free and open-source software portal This category is for packages that implement VOIP and are free software - that is to say that the source code is available under a free software licence . Subcategories
Linphone (contraction of Linux phone) is a free voice over IP softphone, SIP client and service. It may be used for audio and video direct calls and calls through any VoIP softswitch or IP-PBX . Linphone also provides the possibility to exchange instant messages.
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An IP PBX is a PBX system with IP connectivity and may provide additional audio, video, or instant messaging communication utilizing the TCP/IP protocol stack. Voice over IP (VoIP) gateways can be combined with traditional PBX functionality to allow businesses to use their managed intranet to help reduce long distance expenses and take ...