English Dictionary

private branch exchange

noun

(telecommunications) 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.

I need to set up a private branch exchange for our office.

意味（1）

(telecommunications) 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.