PBX is a term of telephone networks system that stands for Private Branch Exchange. This is used in the branch on telephone network within an organization or company. There are many hosted PBX available in the world and getting their services and to make better communication. Those people can easily communicate within their organization as well as to the outside world that are accessing its services. In the pabx, numbers of the channel are there to make communication. Such channels are ISDN (analog), voice over IP etc. A system of pabx involves numbers of channels and physical phone line that allowed the user to make free calls.

The Process of PBX Phone System-

The system of hosted PBX involving the set of standard hardware and software. Those hardware and software are in this system running in a specific way. It has the technical process which connected to the wide area of the network all over the world. In this technical process involves two factors such as:

• Internal system
• External system

There are numbers of features of this technical process to its users. It offers many services like free calls, voicemail, call recording, ACD call queues etc. Two above mentioned factors involves many techniques in this system.

Internal system- The internal system of this technique internally does work and have the completely complex process. The internal process of this system based on software and require internet to access information. Here is a list of different factors of an internal system such as:

• IP phone
• Internet
• IP PBX system
• Analog gateway
• Fax machine

External system– The external system in this technical system does effects to external environment of this system. In this phase of the system are many factors those have listed below:

• ISDN gateway
• PSTN
• Internet
• VOIP provider
• External SIP

Key benefits of PBX–

Here are key benefits of PBX system. Those key benefits of this system have been given below:

• There is the biggest advantage that is easy to use so that there is no end user to maintain the process of this system.
• It has the biggest benefit to your business. The services of this system used to boost up the image of your business.
• The uses of this service can eliminate the boundaries i.e. employees in an office can o their work virtually.

To sum up, this is really the greatest technology that enhances the area of communication. That does effect to both public and private sector.