1
Products

Information and communication

Reference
Symbol
Name
Definition
Note
IEC 60878 5077
5077
Headphones
To identify the socket, terminals or switch for headphones
IEC 60878 5211
5211
Listen
To indicate a "listen" facility
IEC 60878 5210
5210
Speak
To identify the speak mode
IEC 60878 5182
5182
Sound; audio
To identify controls or terminals related to audio signals
IEC 60878 5072
5072
Balance
To identify the balance control
IEC 60878 5013
5013
Bell
To identify switches which operate bells, e.g. a door bell
IEC 60878 5576
5576
Audio Off
To identify the control for Audio Off or to indicate that the Alarm System is in the Audio Off state.
60878 5850
serial connection symbol
Serial interface
To identify a connector for a serial data connection.
usb symbol
USB (Universal Serial Bus) Port
Indicates a connector for USB connection