It is a device capturing and controling all the signals, which are being created by the whole system, especially the made and received phone call signals. The device is mostly used for connecting regular phone system with the Internet and backwards.
Introduction
In business, communication is essential. Without the ability to speak with the exact person you need to at any given time, how could business get done? This is one of the reasons why the idea of a PBX system is so popular among businesses around the world—without it, communication is between employees and clients could potentially be hindered.