Use The Power Cable Pcu-4 - Nokia HF-23 User And Installation Manual

I n s t a l l a t i o n
pins on the fuses of the ISO cable. Plug the ISO cable to the two
open ISO connectors.
2. Plug the ISO cable to the respective connector on the hands-free
unit.
3. Cut the loop indicated with scissors in the figure.
4. Connect the stereo outputs of the hands-free unit to the AUX input
of the car radio. Use an appropriate cable specific to your car radio
(this cable is not supplied with the car kit).
5. Connect the external input device CU-10 and the microphone
MP-2 to the respective connectors on the hands-free unit.
6. To charge a compatible Nokia mobile phone through the car kit,
connect one end of the supplied charging cable CA-134 to the
hands-free unit and the other end to the 2.0 mm (0.08 inch) charging
connector of the phone.
7. Switch on the car kit, press the wheel in the standby mode, and
select Settings

Use the power cable PCU-4

In this setup, the car radio is muted when you make or receive a call.
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> Audio > Music output > Automatic detection.