Communications refers to the process of conveying meaningful symbols from one person to another. A multi-coin telephone is a public telephone where a person may use coins with values of Rp50, Rp100, Rp500 or Rp1000. Official connection refers to main connections, principal office connections, government office telephones, public coin telephones, public credit card telephones, public rooms for direct dialling and test numbers. Paying connection is a telephone connection which consists of the main connection and the paying connections.
Pulse is the unit of measuring conversation through a telephone connection.
Telecommunication is the emission, sending or receiving of all kinds of signs, signals, written pictures, voice, or news through cable or radio, whether visually or electronically. Telegram is a document in the form of written text which is requested to be passed to a particular addressee through the process of telegraphy. Telephone is a system of telecommunication which was created for passing on information through conversation. Telephone exchange is the telecommunications equipment which functions to connect the lines between telephone users. Teleprinter is a digital telegraph instrument which is able to send and receive electrical binary signals.