PBX – private branch exchange

Short for private branch exchange, a private telephone network used within an enterprise. Users of the PBX share a certain number of outside lines for making telephone calls external to the PBX.

Most medium-sized and larger companies use a PBX because it’s much less expensive than connecting an external telephone line to every telephone in the organization. In addition, it’s easier to call someone within a PBX because the number you need to dial is typically just 3 or 4 digits.

A new variation on the PBX theme is the centrex, which is a PBX with all switching occurring at a local telephone office instead of at the company’s premises.

Vangie Beal
Vangie Beal
Vangie Beal is a freelance business and technology writer covering Internet technologies and online business since the late '90s.
Get the Free Newsletter
Subscribe to Daily Tech Insider for top news, trends & analysis
This email address is invalid.
Get the Free Newsletter
Subscribe to Daily Tech Insider for top news, trends & analysis
This email address is invalid.

Related Articles

Embedded Analytics

Embedded analytics brings self-service business intelligence to everyday application users.

HRIS

Human resources information system (HRIS) solutions help businesses manage multiple facets of their workforce operations. They provide a central platform for human resources professionals...

Complete List of Cybersecurity Acronyms

Cybersecurity news and best practices are full of acronyms and abbreviations. Without understanding what each one means, it's difficult to comprehend the significance of...

Human Resources Management System

A Human Resources Management System (HRMS) is a software application that supports many functions of a company's Human Resources department, including benefits administration, payroll,...

ScalaHosting

ScalaHosting is a leading managed hosting provider that offers secure, scalable, and affordable...

HRIS

Human resources information system (HRIS) solutions help businesses manage multiple facets of their...

Best Managed Service Providers...

In today's business world, managed services are more critical than ever. They can...