IP PBX

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An IP PBX (“Internet Protocol private branch exchange”) is a telephony system that uses Internet Protocol to transmit voice and other communication data.[1][2][3][4][5] Unlike traditional PBX systems that depend on circuit-switched networks, IP PBX utilizes packet-switched networks, allowing voice, data, and video to be transmitted over the same network infrastructure. This convergence simplifies the communication architecture and provides a unified platform for managing internal and external communications.

Function

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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. Most of the IP PBX installation uses Asterisk (PBX) for its telephony support, built on LAMP (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 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, Inter-Asterisk eXchange, H.323, Jingle and others.

IP PBX software

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  • 3CX Phone System - 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.

See also

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References

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  1. ^ Horak, Ray (2008). Webster's New World telecom dictionary: a comprehensive reference for telecommunications terminology. Indianapolis, IN: Wiley. p. 251. ISBN 9780471774570. Retrieved 9 November 2025 – via Google Books.
  2. ^ "What is IP PBX?". 8x8. Retrieved 9 November 2025.
  3. ^ Meesad, Phayung; Unger, Herwig; Boonkrong, Sirapat, eds. (2013). The 9th International Conference on Computing and InformationTechnology (IC2IT2013): 9th-10th May 2013 King Mongkut's University of Technology North Bangkok (1 ed.). Berlin; New York: Springer Berlin, Heidelberg. p. 64. ISBN 9783642373718. Retrieved 9 November 2025.
  4. ^ {{cite book |editor1-last=Swale |editor1-first=Richard |title=Voice over IP: systems and solutions |date=2001 |publisher=[[Institution of Electrical Engineers] |location=London |isbn=9780852960240 |url=https://www.google.com/books/edition/Voice_Over_IP_Internet_Protocol/QOYVaVkagZ0C |access-date=9 November 2025 |via=Google Books}}
  5. ^ Brown, Kevin (2004). IP telephony unveiled. Indianapolis, Ind: Cisco Press. ISBN 9781587200755. Retrieved 9 November 2025 – via Google Books.