Automatic telephone PABX (Private Branch Exchange) must be located at the central station area of the station in a project that will serve as a switch cable to transmit both voice and data, For the communication used in railway enterprises
PABX Automatic (Private Branch Exchange) will be located at the Central Station area of the station, a project that will serve switch to send the data, and voice communications in train operation.
PABX automatic (Private Branch Exchange) will be located at the central station area of the station in a project to a line switch to send. The data, and sound for the business communication used in train.