PBX is an abbreviation for the term “Private Branch Exchange” which is a private telephone switchboard.

A PBX is a simple telephone exchange designed to serve a particular office or

business. It is like a smaller version of a telephone exchange designed to serve the general public.

The PBX can also be known under 2 other acronyms

• PABX –private automatic branch exchange
• EPABX – electronic private automatic branch exchange

Essentially, a PBX is designed to make connections among the internal telephones in a private organisation just like they do at your telephone exchange.

Organizations utilize PBX business phone systems to connect each of their internal telephones to an outside line. In this way, they’re able to lease only 1 line and also have a lot of people utilizing it, with each one having a telephone at their desk with various telephone numbers.

The number at the desk isn’t within the same format as a regular telephone number though, since it depends on a internal numbering system. Inside of a PBX telephone system, you simply need to dial three-digit or four-digit numbers to create a call to a different telephone within the network. We quite often make reference to this number as being an extension.