In any business environment, the need for an efficient business telephone system is necessary. Having one in place enables users to communicate and exchange information in a fast and cost-efficient manner. Private Branch Exchange system or PBX system is a type of business phone system that is commonly used these days. Unlike phone systems that a telephone company or carrier runs for various enterprises, it serves a specific office or business. A Brief History The PBX phone system was first introduced during the time when companies were heavily dependent on manual switchboard operators. Not too long after that, electronic and electromechanical switching system started to take over and replaced the old scheme. The new system was called Private Automatic Branch Exchange or PABX, and, sometimes, Electronic Private Automatic Branch Exchange or EPABX. Today, it is more commonly referred to as PBX. Components Of A PBX System A PBX Phone System includes the following: