4 Types of Phone System to Apply in the Buildings and Offices

Ideally, a complex of offices and departments must have their own phone system. It is very important to connect the entire phone network in one particular area. The network will be centered in one system that manages how the calls are dialed and incoming. Mostly, the buildings use PABX phone system for this. However, there are also options like MDF and Billing System to choose. In this modern day, many business owners even change their system into IP PBX as it is considered more beneficial. Further explanations of those types of the office telephone system are explained below.


PABX stands for Private Automatic Branch Exchange. It is the most popular one compared to other phone systems used by clients. In general, it can be defined as the automatic phone central that is functioned as the center of the phone network. This device is functioned to manage the incoming calls and then distribute them to the destination number easily. There are some types of PABX phone device including the digital, analog and hybrid PABX systems.

What are the differences between those PABX systems? The digital PABX is a type of PABX that uses the digital device for the extension. It supports some features including the conference call, party, and more. Meanwhile, the analog PABX only supports conventional phone devices. In other words, it is the opposite of the digital nec PABX system. Lastly, there is the hybrid PABX that is compatible with both digital and analog phones on its extension ports.


MDF or Main Distribution Frame is where all the connectors of the phone installation in an area meet up. The connectors from the outside of the building can also be connected there also. There are 2 connection sides in MDF; a connection for the wire from the terminal box and another connection which is purely from PABX. Both sides are connected by the wire.

Billing System

The billing system is actually still a part of PABX so that it is often called also as the Billing System PABX. The system is basically the additional or extension system of PABX in the form of software or hardware. This extension is run in a computer that has been connected with PABX. The main function is to calculate the phone cost per extension in a certain period of time.

The billing system is created mainly to monitor phone usage in real time. That’s why; it is necessary to use in offices, building complexes, hotels, or apartments. The users are easier to do actions if the phone usage is more than what it is expected.


If the 3 systems above are related to each other, IP PBX is out of them. IP PBX is known as a phone system with complete features. It provides phone calls management by using the internet system known as the Voice over Internet Protocol (VOIP). All the conversations are sent in the form of data package through the network. It is created using sophisticated communication technology, making it really efficient and qualified as well as integrated well into the CRM system.

How does IP PBX work? IP PBX consists of one or more SIP-based internet phone, IP PBX server, and optional VOIP gateway. Uniquely, although all of them are brand-new internet features, they can be connected well to the traditional phone lines.

In general, the functions of IP PBX are similar to the Proxy Server. So, the clients are automatically registered to the IP PBX server when they are dialing the phone. The recipient’s number is asked and they can easily connect with each other. The system also has a directory to all members that enable them to communicate both internally and externally.

Compared to the PABX system and its generation, IP PBX indeed gives some more benefits. First of all, this is what makes the business should choose the system. It is about cost-saving matters. Using the internet as the communication network, it enables your business and company to press the regular communication budgets.

Second, the system is also well-known for its effective productivity enhancement. It gives you a modern facility to improve the company’s productivity through smoother communications. The connectivity tends to be more stable and the company is more independent without dealing with a vendor.

Third, the IP telephone gives you more access to implement the numbering plan in the company’s branches. The ID number is given to each division for easier communication. Not to forget, there is a better scalability. You can conduct phone extensions without providing a whole new system. All you need to have is the IP phone extensions.

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