What is PBX?

PBX (Private Branch Exchange) is a private phone to switch the phone to process multiple telephone lines without paying a telephone company to rent each line separately.

Normally, the telephone line is connected to the local central office of the telephone company via the "trunk". The central office is responsible for routing incoming and outgoing calls. It also provides other services such as voice mail, calling calls, caller ID, etc. For this service, the telephone company receives a monthly fee. With PBX on the spot, each phone only needs extension, not a telephone number and PBX processes all calls made from the table to the board within the company, usually "9" (in the United States). PBX then converts calls to the central office of the telephone company. From there the call is normally routed. If the company has 100 phones, it is unlikely that everyone would make an external call at the same time. Possible only 10% will require an outer line at a given momentku. Therefore, the company would rent 10 lines from the telephone company rather than 100.

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PBX systems can be bare bones or rich in functions, depending on what the customer is willing to pay. Voice mail, calls, conferences, interjends and transfer are just some of the available options.

The significant feature of PBX is control over numbers that may and cannot be dial from inside the system. This can prevent calls abroad, at 900 OTUPLOLEBO on other costly numbers that would be available without an established system.

Small PBX, which can be used in a home or small business, can be purchased for about $ 100 - $ 1,000, depending on the functions. Greater handling of PBXS up to 75 lines starts at about $ 1,000 and can go up to $ 10,000. There are also robust systems that process up to 20,000 rows. These systems start about $ 10,000 and can move up to ten times higherStku. Asterisk is currently developing, a promising free and open source version of PBX software; Starting the star on a dedicated computer together with the transition to VoIP can save you even more for your monthly telephone costs.

known PBX systems include the Avaya Definition series (System 75 and System 85) and Meridian Systems Northern Telecom. Melite, Siemens and NeC are among other popular PBX manufacturers.