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Universal Bluetooth
TM
Hands-Free System (ULF)
14
• Press send/receive button on MFL (Steering Wheel)
• Press send/receive button on the oddment tray (Center Console)
• Select the green phone symbol on the Display Screen.
• Press send/receive key on mobile phone
Conducting a Call
If the call is accepted by pressing the send/receive key on the Radio (5
series and X5 SAV), Display Screen, steering wheel or center console, it will be
conducted via the hands free microphone and vehicle speakers.
If a call is accepted by pressing the send/receive key on the mobile phone, the
reaction will depend on the type of handset. In the majority of cases, however,
the question appears:
"Do you wish to use the mobile phone?"
Please refer to the operating instructions of the mobile phone for a detailed
description of the operating procedure of the phone.
The hands-free function is activated after pressing the send/receive key. The
incoming call is encoded (scrambled) via the Bluetooth
TM
interface in the mobile
phone and sent to the Bluetooth
TM
antenna in the vehicle. The call is received by
the ULF control module and output via the radio to the audio speakers.
Since the ULF system provides a digital full-duplex hands-free operation, it is
possible to simultaneously speak and listen to calls. An echo cancellation
function prevents feedback when speaking into the microphone. The
microphone audio signal is sent via a hardwire connection to the ULF control
module. In the ULF module the received audio signal is scrambled via the
Bluetooth
TM
module and transferred via the Bluetooth
TM
antenna to the mobile
phone. The mobile phone then transmits the call via the phone antenna.