Telephone Exchange Machine and Networking System used in a Hotel

1. Private Branch Exchange (PBX): This system is most used in small and medium hotels or organization. This is a manually operated system which consists of a single line with few extensions. PBX is found in different capacities. For example: 2+20, means the system have 2 main lines and 20 extensions. The extension lines are fixed in the system. The charge of call made by the guest should be calculated manually and the bills should be prepared manually by the telephone operator. All the outgoing calls are made made with the help of telephone operator.
2. Private Automatic Branch Exchange (PABX): This system is widely used in large hotel and organizations where there is 100's of incoming and outgoing calls everyday. This is automatically operated system where there are number of extension lines. Individual meters are provided for each extension line. A guest can directly make an outgoing call from the room without going through the telephone operator. This system is comparatively expensive to PBX system.
3. Electronic Private Automatic Branch Exchange (EPABX): This system is the developed form of PABX where the charge is made by computerized system. Wake-up call requested by the guest are also computerized by this system. This system has reduced the size of PABX by eliminating the need of individual meters for each extension.