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This feature is only available on mobile phones that use
the Bluetooth hands-free profile.
D10 Adjusting the volume of received calls
There are five volume settings.
• Briefly press raise volume + (7.2) to increase the vol-
ume by one step.
• Briefly press lower volume - (7.3) to decrease the vol-
ume by one step.
The volume can also be adjusted by holding in the
relevant volume button for a longer period. A tone will
indicate each step, with a lower tone at the end of the
range. It takes about four seconds to go from min. to
max. or vice versa. The volume can only be adjusted
while a call is in progress. The last setting is stored
when the headset is switched off.
The headset volume can be adjusted from a mobile
phone if it supports this feature. (See the user's instruc-
tions for the telephone.)
Microphone muting only affects the sound from the
headset microphone and is only possible when the
audio link is connected, Microphone muting is reset
after each connection.
NOTE! Adjust the volume when you are working in a
noisy environment, since all warning signals will be
controlled by the volume setting.
D11 Adjusting side tone while transmitting and dur-
ing phone calls
When side tone is switched on, you will also
hear your own voice in the headset. There are
five side tone settings. The level can only be
adjusted when the audio link is connected. When this
feature is switched off, side tone will only work when the
PTT button is pressed, or if voice-activated transmission
is active, or during a voice call with a mobile phone.
• Briefly press the On/Off button twice in rapid suc-
cession to adjust side tone. Two short, low tones will
confirm that it has been selected.
• Briefly press raise volume + (7.2) to increase the
volume by one step. The change will be confirmed
by a brief tone.
• Briefly press lower volume - (7.3) to decrease the
volume by one step. The change will be confirmed
by a brief tone.
The volume can also be adjusted by holding in the
relevant volume button for a longer period. A tone will
indicate each step, with a lower tone at the end of the
range. It takes about four seconds to go from min. to
max. or vice versa. The volume can only be adjusted
while a call is in progress.
• Briefly press the On/Off button again to switch off
side tone adjustment. Otherwise the adjustment
mode will be automatically switched off after 15 sec-
onds. A short, high tone confirms that you have left
adjustment mode.
The set level is saved even when the headset is
switched off or the batteries are replaced.
D12 Switching a call from the headset to a mobile
phone
This feature is provided by some mobile phones and is
therefore specific to each phone.
D13 Ending a call on a connected mobile phone
• Briefly press the PTT button (7.4) to end the call.
D14 Low battery level warning
When the batteries are nearing the end of their useful
life the voltage will drop, and when around five minutes
of battery life are left, the headset will sound three short
tones every 30 seconds to warn you that the batteries
should be replaced as soon as possible. The headset
will be switched off automatically when the batteries are
discharged.
D15 Range indication
If pairing has already been carried out, the headset will
automatically search for the linked Bluetooth adapter or
mobile phone when it is next switched on.
Two tones of rising frequency will indicate when the
Bluetooth link has been established. If the link cannot
be established, you will hear two tones of decreas-
ing frequency. (There will be no automatic attempt to
reconnect.)
If the range has been exceeded and the link is broken,
the headset will continue searching for the paired de-
vice for three minutes. In order to save energy, subse-
quent attempts to reconnect will only be made every 15
minutes, until the link is re-established or the headset
is switched off automatically (see D1 above). If the link
can be re-established, reconnection is indicated by two
tones of rising frequency, but if no connection is made,
then the headset will continue trying to establish the
Bluetooth link with the paired adapter or mobile phone
later. If the connection with a mobile phone is broken
while the Bluetooth link is established, however, no
automatic attempt will be made to reconnect.
The warning signal (two tones of decreasing frequency)
will stop automatically if the headset comes within
range again.
• Briefly press the On/Off button (7.1) to switch off the
warning signal.
• Briefly press any of the buttons on the headset if you
want to switch the warning signal back on.
D16 Other indications
GSM connection broken
If the mobile phone loses connection with the telephone
network a warning signal will sound every 10 seconds.
Hands-free Profile
During communication with equipment that uses the
Bluetooth Headset Profile, two tones of rising frequen-
cy will indicate that the call has been disconnected.
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