An Introduction to PBX Phone Systems

PBX is abbreviated to Private Branch Exchange. As the name suggests, it is a private network that is used for communication, within an organization or a company. There are various communication channels provided by these systems like ISDN or Analog, Voice over IP, etc, that are utilized by the company to communicate both internally within the company and also to the outside world.

Generally, in large companies, a physical phone line does not support communication as well as the connections between various phones, both internally and externally. However, a neat solution to this problem is solved by using the pbx systems, which allow not only for multiple connections but also for free calls. Additionally, it also provides other features like:

  • Interactive Voice Menus
  • Call Queues
  • Voicemails
  • Transfer calls
  • Call recordings

Olden PBX Systems

Traditionally, the PBX systems were designed to win proprietary phones, while using the phones with various other techniques. This meant that the phones either have a system-lock-in or vendor lock-in’s. System lock-in meant that the phones were connected to one particular system and changing these systems, ultimately meant changing the phones, which would be an expensive procedure.

However, over the years, the advent of technologies has changed the techniques by which these PBX phone lines worked. In addition to this, it has also changed the consumer telephony landscape with the Open-Standard-based IP PBX.

The use of IP is dedicated to the use of Internet Protocol and the underlying transport technology, which is mainly used to secure confidential phone calls. Since the phone calls run on their own hardware, the PBX phone systems are always virtual or hosted as on-premise solutions, which accentuated the process of running on their hardware and software.

A traditional PBX line constrains the user of the maximum outside telephone lines, also called trunks, and also limits the internal phone extensions or phone devices.

Challenges Faced

Switching a network from the regular ones to the PBX networks brings extensive benefits to the user. It opens doors to new possibilities of communication, also enhancing the safety of the line. The system almost allows for unlimited growth in terms of trunks and extensions, which also introduces complex functionalities in terms of the cost and also the procedure and the difficulty in implementation of the PBX.

Some of those challenges include:

  • Ring Groups
  • Voice mail
  • Digital receptionists
  • Reporting
  • Queues


Despite the challenges faced, the system altogether allows for the best benefits in industry communication, over secured liens. Some of the benefits include:

  • Significant cost saving
  • Elimination of phone wiring
  • GUI based configuration and interface which is easier to manage
  • Easier to install and configure
  • Elimination of vendor lock-in
  • Better scalability and consumer productivity
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