What Is PBX Telephony?
PBX (private branch exchange) telephony is a network of telephone extensions connected to an automated switch. The network allows multiple end users to make phone calls within the network, in addition to calling outside lines, without any need for a switchboard operator.
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History
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PBX originated from the necessity to place and receive telephone calls without being connected by a human operator. In the 1960s, PBX systems were developed for office use in order to save money on intra-office calls.
Components
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A PBX system is powered by a logic processor, which is a piece of software that handles call routing. During the early days of PBX, special phones were required, but today's systems can adapt to almost any existing phone, including cell phones. An protected power supply is typically used in order to ensure continuous functionality in the event of a power outage. An outside trunk line is also required to connect the network to outside telephone lines.
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VoIP PBX
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In the 1990s, engineers developed a method of sending voice data in packets over a computer network, leading to the birth of voice over internet PBX. This drastically reduced the cost of long distance calls as the need for long distance service became unnecessary.
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References
- Photo Credit old telephone switchboard image by Yali Shi from Fotolia.com
