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Accessories
Music Mute Control
An optional Music Mute unit is supplied with +12V via the DC12OUT pin of the
Music Mute Connector. The Music Mute function is controlled from the phone by
the MUTE signal of the System Connector via the DSP, a latch, and finally a switch-
ing transistor in the Music Mute Control block.
Power Supply
The HandsFree Unit is able to deliver up to 950mA to the phone for operation and
battery charging.
Phone Operation:
The power consumption of the phone in different situations, e.g. in stand-by or in
transmission, is entirely controlled by the phone itself, as these power levels are pro-
grammed and stored in the phone.
Battery Charger:
As the phone battery at all times is provided with current from the HandsFree Unit,
the charging of the battery, incl. trickle charging, is controlled by the phone itself.
For more information regarding regarding the battery charging algorithms of the tel-
ephone, refer to section 2, Technical Description, subsection Battery Charging.
Optional Accessories
Music Mute
An optional Music unit can be connected to the Handsfree Unit and will direct the
amplified received audio signal to the car stereo speakers during the handsfree con-
versation.
If the car stereo is equipped with a specific "mute" input, the optional Music Mute
Cable connected directly between this input and the Handsfree Unit will mute the
car stereo during the handsfree conversation.
Note: Max. current load at Music Mute output is 200mA.
Goose-Neck Microphone
A Goose-Neck Microphone allows a more flexible microphone position for
improved sound quality incl. reduction of transmitted noise.
Data Extension
Data communication using handsfree mode is made possible by connecting a Data
Extension Unit between a modem and the Data Communication Connector.
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