Geemarc DALLAS 100 VM Manual page 10

USING THE PHONE
b.Set the AMPLIFY Switch to OFF position,
the Amplification is off when handset is lifted.
12 - Receive volume amplification
When unit is off-hook, press the button to toggle
the amplification On & Off
Amplification On:
When amplification is on, the corresponding LED on,
+15dB extra amplification is applied to the handset
receive volume control.
Amplification Off:
When amplification is off, the corresponding LED is off,
no extra amplification to the handset receive volume
control.
13 - Flash time setting
a.Set the flash Switch located at rear side of unit .set to
100ms position (for UK), the time is auto set in 100ms
mode when handset is lifted.
b.Set the flash Switch to 300ms position (for French),
the time is auto set in 300ms mode when handset is
lifted.
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