Components Of Small Business PBX

Small business PBX acts as a telephone exchange for a particular business organization.

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A PBX system is different from a Telephone Company or a common exchange that offers services to many business organizations or the general public. PBXs are also termed as PABX and EPABX. PABX termed as private automatic branch exchange, while EPABX is referred as electronic private automatic branch exchange.

A small business PBX operates as a telephone connection point for an individual organization. The PBX system controls the calls between the different extensions and the connection of PSTN through trunk lines. The term extension is referred to any end point at the branch, as they incorporate fax machines, telephones, modems and many more.

Unlike key systems, which have to select outgoing calls manually, the PBXs select outgoing calls automatically. The hybrid systems connect the features of both the systems. The PBXs are advantageous as they are very cost effective. They control the circuit switching and lower the charges for phone services. With the further development in the technology the PBX system has also started offering services that were not available in the network earlier, such as, call forwarding, extension dialing and hunt groups.

During 1990s two important developments led to the emergence of new kinds of the PBX systems. One was marked with the rapid development of the data networks and packet switching. Different companies used packet switching for making telephone calls. It was very tempting and further development of the Internet made this form of communication even more attractive. All these factors helped in the development of voice over IP PBX.

Another development gave rise to the concept of the hosted PBX. In this form of the PBX system, PBX was managed and located by the phone service provider. In this case, the calls and other features are transferred through Internet. Now with the help of this system customers can sign for the services rather than purchasing and maintaining the expensive hardware.

The 9 key components of the small business PBX are:

1. Internal network for switching

2. CPU

3. Power cards, logic cards, controls and switching cards

4. Telephone sets

5. Telco trunks for delivering signals to PBX

6. Switchboard or console for maintaining incoming calls

7. UPS, batteries and power switches

8. Interconnecting wiring

9. Closets, cabinets and vaults

The small business PBX system establishes connections between the phone sets of the two users. The system maintains the connections as per the requirement of the user and provides information related to the metering calls.