PBX

American  

1. 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.

---

PBX British  

abbreviation

1. private branch exchange; a telephone system that handles the internal and external calls of a building, firm, etc

---

Etymology

Origin of PBX

P(rivate) B(ranch) Ex(change)

Example Sentences

It was there that he began his music career, releasing his debut album PBX 1 in October 2018 under the stage name of Sidhu Moose Wala - or "Sidhu of Moosa", his village.

From BBC

PBX 9502 is especially tricky because it’s an insensitive explosive, meaning it won’t go up if smacked or set on fire.

From Science Magazine

I stood behind a bookshelf and surreptitiously Googled “PBX” on my iPhone.

From The New Yorker

Murals of Nikola Tesla and Margaret Hamilton, the computer scientist who wrote flight software for NASA’s Apollo program and coined the term “software engineer,” stretched across one end of the room, facing a wall of books with titles such as “Silicon Snake Oil” and “Stealing the Network: How to Own a Continent” and a wall-mounted red telephone with a handwritten plaque reading, “The interhackerspace PBX starts here.”

From The New Yorker

Microsoft said one new feature, called Cloud PBX, routes voice calls so customers don’t need to operate private branch exchange equipment or install software on their own premises.

From The Wall Street Journal