private branch exchange

noun

A telecommunications switching system, physically located at a customer's place of business, that provides internal communication between users and also access to outside (trunk) telephone lines.

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Meanings

nounprivate branch exchange (plural private branch exchanges, abbreviation PBX)

plural private branch exchanges · abbreviation PBX

  1. communicationsA telecommunications switching system, physically located at a customer's place of business, that provides internal communication between users and also access to outside (trunk) telephone lines.
Cite this entry
APA

private branch exchange. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/private%20branch%20exchange

MLA

“private branch exchange.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/private%20branch%20exchange. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “private branch exchange,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/private%20branch%20exchange.

Source: private branch exchange on Wiktionary, CC BY-SA 4.0.