What Is a PBX Machine?

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A PBX (private branch exchange) machine is a telephone system that serves a particular business or organization. All telephones in the organization are wired to the PBX machine.

Function

  • A PBX machine acts as a telephone switch. It connects company employees with one another, as well as with outside callers.

Inside

  • Each employee is assigned a three- or four-digit number that can be dialed so employees can to talk to one another.

Outside

  • To call outside the company, an employee dials an outside access code, which is usually just one number, before the office’s telephone number. The access code is usually the number nine.

Exclusive

  • PBX serves a particular company or organization, meaning that the system cannot be accessed or used by anyone except employees.

Significance

  • PBX is cost-effective and convenient because it eliminates the installation of individual phone lines for each employee of a company.

References

  • Photo Credit Hemera Technologies/AbleStock.com/Getty Images
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