Webopedia on Google+Webopedia on TwitterWebopedia on FacebookTech Bytes Blog
Main » TERM » I »


Short for Internet Protocol Private Branch eXchange, a telephone switch that supports VoIP. An IP PBX provides services similar to PBX services, but over data networks like a LAN or WAN rather than circuit-switched networks. IP PBX typically can switch calls between VoIP on local lines or between VoIP and traditional telephone users in the same way PBX does. IP PBX may also be seen abbreviated as IPPBX or IP/PBX.


See also Internet telephony and PBX.

8 Agenda Apps to Help Students Stay Organized

Webopedia's student apps roundup will help you to better organize your class schedule and stay on top of assignments and homework. Read More »

List of Free Shorten URL Services

A URL shortener is a way to make a long Web address shorter. Try this list of free services. Read More »

Top 10 Tech Terms of 2015

The most popular Webopedia definitions of 2015. Read More »

Java Basics, Part 1

Java is a high-level programming language. This guide describes the basics of Java, providing an overview of syntax, variables, data types and... Read More »

Java Basics, Part 2

This second Study Guide describes the basics of Java, providing an overview of operators, modifiers and control Structures. Read More »

The 7 Layers of the OSI Model

The Open System Interconnection (OSI) model defines a networking framework to implement protocols in seven layers. Use this handy guide to compare... Read More »