A small telephone exhange, usually a replica that is connected to the telephone company’s exchange and is installed at the subscriber’s location. The PBX is capable of handling hundreds of telephone connections and has the ability to route incoming calls to the desired extension through automation or through a telephone operator. Latest PBX’s are based on a computer system and often require a connection to a server to aid it in the management of calls.

More On This Topic

Link to This Definition
Did you find this definition of PRIVATE BRANCH EXCHANGE (PBX) helpful? You can share it by copying the code below and adding it to your blog or web page.
Written and fact checked by The Law Dictionary