Geemarc CL1400 Notice D'utilisation page 28

RECEIVING VOLUME AND TONE
Bass
+10dB max
Note: When the tone (treble), earpiece volume and
sending levels are set to the maximum, whistling
may appear. If whistling occurs the sending level
settings should be decreased (sending level switch
is located at the upper side of your phone. When
the switch
extra-receiving and tone functions are
automatically activated each time you use the
phone.When the switch
will need to activate the function by pressing the
button
TONE
Normal
VOLUME
0dB
+15dB
located behind the phone is ON, the
.
+15dB
+30dB
is switched to OFF, you
28
Treble
+10dB max
OFF
ON