An IP PBX ("

Internet Protocol The Internet Protocol (IP) is the network layer communications protocol in the Internet protocol suite for relaying datagrams across network boundaries. Its routing function enables internetworking, and essentially establishes the Internet. ...

private branch exchange A business telephone system is a multiline telephone system typically used in business environments, encompassing systems ranging in technology from the key telephone system (KTS) to the private branch exchange (PBX). A business telephone syst ...

") is a system that connects telephone extensions to the

public switched telephone network The public switched telephone network (PSTN) provides infrastructure and services for public telecommunication. The PSTN is the aggregate of the world's circuit-switched telephone networks that are operated by national, regional, or local telep ...

(PSTN) and provides internal communication for a business. An IP PBX is a PBX system with IP connectivity and may provide additional

audio Audio most commonly refers to sound, as it is transmitted in signal form. It may also refer to: Sound *Audio signal, an electrical representation of sound *Audio frequency, a frequency in the audio spectrum * Digital audio, representation of sou ...

video Video is an electronic medium for the recording, copying, playback, broadcasting, and display of moving visual media. Video was first developed for mechanical television systems, which were quickly replaced by cathode-ray tube (CRT) sy ...

, or

instant messaging Instant messaging (IM) technology is a type of online chat allowing real-time text transmission over the Internet or another computer network. Messages are typically transmitted between two or more parties, when each user inputs text and tri ...

communication utilizing the

TCP/IP The Internet protocol suite, commonly known as TCP/IP, is a framework for organizing the set of communication protocols used in the Internet and similar computer networks according to functional criteria. The foundational protocols in the su ...

protocol stack.

Voice over IP Voice over Internet Protocol (VoIP), also called IP telephony, is a method and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. The terms Internet t ...

(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 advantage of the benefits of a single network for voice and data ( converged network). An IP PBX may also provide CTI features. An IP PBX can exist as a physical hardware device or as a software platform.

Function

IP PBX is primarily a software hosted on a regular desktop or server as per the requirement demands based on the expected traffic & criticality. Till 2019 IP PBX were deployed primarily as inbound and outbound call center solutions for large corporate and commercial cloud telephony operators worldwide

cloud communications Cloud communications are Internet-based voice and data communications where telecommunications applications, switching and storage are hosted by a third-party outside of the organization using them, and they are accessed over the public Internet. C ...

. Most of the IP PBX installation uses Asterisk (PBX) for its telephony support, built on

LAMP Lamp, Lamps or LAMP may refer to: Lighting * Oil lamp, using an oil-based fuel source * Kerosene lamp, using kerosene as a fuel * Electric lamp, or light bulb, a replaceable component that produces light from electricity * Light fixture, or ligh ...

(Linux-Apache-MySQL-PHP). With telecom service providers across the world is slowly preferring SIP Trunks over Primary Rate Interface as main enterprise communication delivery, the IP PBXs will now be in demand extensively. As IP PBX is software, functions and features can be designed based on the customers' requirements such as conference calling,

XML-RPC XML-RPC is a remote procedure call (RPC) protocol which uses XML to encode its calls and HTTP as a transport mechanism.Simon St. Laurent, Joe Johnston, Edd Dumbill. (June 2001) ''Programming Web Services with XML-RPC.'' O'Reilly. First Edition ...

control of live calls,

interactive voice response Interactive voice response (IVR) is a technology that allows telephone users to interact with a computer-operated telephone system through the use of voice and DTMF tones input with a keypad. In telecommunications, IVR allows customers to interac ...

(IVR), TTS/ ASR (text to speech/automatic speech recognition), PSTN interconnectability supporting both analog and digital circuits, VoIP protocols including SIP, Inter-Asterisk eXchange,

H.323 H.323 is a recommendation from the ITU Telecommunication Standardization Sector (ITU-T) that defines the protocols to provide audio-visual communication sessions on any packet network. The H.323 standard addresses call signaling and control, mu ...

, Jingle and others.

IP PBX software

3CX Phone System The 3CX Phone System is the software-based private branch exchange (PBX) Phone system developed and marketed by the company, 3CX. The 3CX Phone System is based on the SIP (Session Initiation Protocol) standard and enables extensions to make cal ...

- Was based on Windows operating system, but now has windows and linux versions. * Asterisk - Based on Linux operating system and has the largest market share. Most of the other IP PBXs were derived and customised on Asterisk as you will find a very long list. * Bicom Systems * Dialexia
MVoice
* trixbox (formerly Asterisk@Home) *freeswitch https://freeswitch.com/ *xivo https://www.xivo.solutions/

References

{{DEFAULTSORT:Ip Pbx Office equipment Telecommunications equipment VoIP software

Function

IP PBX software

See also

References