a manually or automatically operated telephone facility that handles communications within an office, office building, or organization and that is connected to the public telephone network.
- Compare PABX
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use PBX in a sentence
It is a PBX machine and is in the nature of a board up on the wall and it has several sections.Warren Commission (10 of 26): Hearings Vol. X (of 15) | The President's Commission on the Assassination of President Kennedy
British Dictionary definitions for PBX
private branch exchange; a telephone system that handles the internal and external calls of a building, firm, etc
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012