E85 Information/Communication
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Hands-free module
The hands-free module in the ULF controls the input/output of
AF signals in hands-free mode. Hands-free mode is activated by
pressing the send/receive key in the base plate on the multi-
function steering wheel or in the radio control panel.
The hands-free facility is designed for full-duplex transmission.
This means the user can listen and speak simultaneously. Voice
transmission takes place via a microphone in the vehicle interior.
Power module
The power module in the ULF control unit regulates the voltage
supply and monitors system shut-down in the event of under-
voltage.
I/K-bus interface
The interface in the ULF control unit for the I/K-bus controls the
procedure for transmitting and receiving data telegrams via the
I/K-bus in connection with other I/K-bus users.
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