Typical PBX Features

Typical PBX Features
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Normally, a PBX (or IP PBX) has a set of features that allows users to make the most of their phone calls. These features vary among different PBX models, but some of the common features are:
IP PBX in use
Call-waiting
Call hold
Call transfer
Call parking
Paging
Call recording
Voicemail
IVR (Interactive voice response)
Follow-me
Call forward
Presence
Advantages of IP PBX
The advantages of IP PBX systems derive from the fact that they are software-based and that they use normal computer networks. The most immediate benefit that comes to mind is the fact that, using IP PBX, one does not need to have a dedicated voice network anymore, as a legacy PBX would require, but rather use a single network for both voice and data. Saying that, many organizations choose to separate voice and data networks for security and quality assurance reasons.
Other benefits include using standard IP phones (typically SIP phones), the ability to create and use remote and mobile extensions, improved flexibility with computer-telephony integration, call-cost reduction, the ease of adding DID (Direct Inbound Dialing) numbers, including numbers of different regions and countries and more.
In below video we explain the place of IP Telephony PBX PBA Doha Qatar in the network.
IP PBX tutorial ñ understanding the place of IP Telephony PBX PBA Doha Qatar in the Network ñ explanatory video
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PBX, IP PBX, VOIP: Understanding the Basics of Business Phone Systems
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If you have ever called a business and selected numbers for menu options or dialed a specific office extension, you have used a Private Branch Exchange (PBX) telephone system.
In the early years of telephone lines, calls went through public switchboards, where operators manually directed them to the correct receivers. In the mid-20th century, the demand grew, and multiple lines were installed to handle the growing number of phone calls. Businesses began using separate lines for each internal department. However, they still had to pay for each expensive call, including calls made between departments, which cost just a much as a call made across town. As these costs grew, the need for a better solution was soon apparent.
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This sparked a business telephone revolution that would continue to develop through the 21st century and into the digital revolution.
A history of PBX systems
The first PBX system was developed by lawyers in the 1960s and required a human operator to manually direct calls. By hiring their own operators and purchasing or renting a small number of telephone lines and blocks of switchboards, companies were able to use a large number of phones for less.
The fact remained, phone calls still required a human operator. Automated switchboards had been used by public services for several decades, but private businesses were hesitant to use this often unreliable technology.
In the 1970ís automated switchboards saw the addition of superconductors, making them faster and more trustworthy.
Without the need for a human operator, PBX systems became even more affordable and popular. As businesses moved from using public services, they discovered more perks offered by their new systems, including extension dialing, hunt groups, and call forwarding.
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As computers developed, an update to PBX appeared: the Time Division Multiplexing (TDM) system. This system, which is still the telephone system most commonly used by corporations today, was built much like a desktop computer. It was designed as a large cabinet that housed a hard drive, central processing unit (CPU), random access memory (RAM), and operating system. Businesses could easily add hold music or additional telephone lines by purchasing new boards to add to the cabinet, which was smaller than previous systems.
Unfortunately, this new system could be a costly investment. To move from analog to digital, every phone needed a TDM-compatible replacement. Those easily added boards were only available with 16 lines, which forced companies to buy more lines than they needed.
Then came the internet, and with it, a new development to join the PBX and TDM systems

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