How do I Determine the Right Size PBX System?

By Robin Wilding
Updated: April 01, 2011

Determining the size PBX you require should be based on two factors:

  1. The Number of Lines
  2. Number of Extensions

When you add the number of lines/trunks (outside lines) and extensions (handsets, faxes, credit card machines, modems, etc) together you will have how many ports you need from a PBX. While most small offices, small businesses and remote and branch locations will be served well by a small office PBX, some phone-intensive business like call centers may require a larger system. 


Featured Research
  • 16 Mistakes to Avoid When Buying a Phone System

    Purchasing a phone system for your business is a major investment. With the average business changing phone systems only once every seven years, it’s important to make the right decision. more

  • [Infographic] Top 11 VoIP Vendors

    A good VoIP provider will offer additional benefits as well, but many first-time buyers find assessing each option to be difficult. Nevertheless, this is an important step in the buying process because a substandard provider can easily waste both your time and money. more

  • The New 2017 Phone Systems Comparison Guide

    It was a painstaking process, but to help B2B companies start 2017 off on the right foot, we recently compiled a comparative list of the top 34 business phone vendors in the world. In one, easy-to-reference location, we’ve neatly outlined the information you need. more

  • 8 Common Pain Points UC Eliminates

    Many businesses rely on a collection of communication tools that they adopt to address specific needs as they arise. This strategy may seem to work in the beginning, but eventually will lead to a system that is cumbersome to use, difficult to explain to new hires, expensive, and effective in some areas, but full of gaps. more

  • Top 11 VoIP Vendors

    Signing up with a VoIP provider is a major business decision that will affect your internal communications, customer service, and communications with business partners. The decision can be a difficult one; choosing the wrong VoIP provider can cost a business hundreds of thousands of dollars. more