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These interconnected networks enable global communication, allowing calls to be made to and from nearly any telephone worldwide. [1] Many of these networks are progressively transitioning to Internet Protocol to carry their telephony traffic. The technical operation of the PSTN adheres to the standards internationally promulgated by the ITU-T.
As IP PBX is software, functions and features can be designed based on the customers' requirements such as conference calling, XML-RPC control of live calls, interactive voice response (IVR), TTS/ASR (text to speech/automatic speech recognition), PSTN interconnectability supporting both analog and digital circuits, VoIP protocols including SIP ...
The broader terms Internet telephony, broadband telephony, and broadband phone service specifically refer to the delivery of voice and other communication services, such as fax, SMS, and voice messaging, over the Internet, in contrast to the traditional public switched telephone network (PSTN), commonly known as plain old telephone service (POTS).
User interfaces for conferencing have a number of different uses; they can be used for scheduling, setup, and making a video call. Through the user interface, the administrator is able to control the other three layers of the system. Conference Control performs resource allocation, management, and routing.
H.323 is a system specification that describes the use of several ITU-T and IETF protocols. The protocols that comprise the core of almost any H.323 system are: [8] H.225.0 Registration, Admission and Status (RAS), which is used between an H.323 endpoint and a Gatekeeper to provide address resolution and admission control services.
Audio bridge (a meeting room, where people can call in to hold a conference) Document share (a central repository that allows secure access to documents, under flexible business rules) Computer-telephony integration (linking phone and computer systems, to enable click to call and the control of voice calls from the computer applications)
Skype for Business Server (formerly Microsoft Office Communications Server and Microsoft Lync Server) is real-time communications server software that provides the infrastructure for enterprise instant messaging, presence, VoIP, ad hoc and structured conferences (audio, video and web conferencing) and PSTN connectivity through a third-party gateway or SIP trunk. [3]
This is a comparison of voice over IP (VoIP) software used to conduct telephone-like voice conversations across Internet Protocol (IP) based networks. For residential markets, voice over IP phone service is often cheaper than traditional public switched telephone network (PSTN) service and can remove geographic restrictions to telephone numbers, e.g., have a PSTN phone number in a New York ...