Geemarc PHOTOPHONE 155 User Manual page 32

SETTINGS
AMPLIFY ON/OFF Switch at OFF Position
The additional amplification and tone controls are turned off each
time you use the telephone. The Amplify LED will be off
whenever you use the telephone.
Pressing the Amplify button once during a call will enable tone
control and additional amplification. The LED light will turn on to
reflect this change. If you press the amplify button once more,
the additional amplification and tone control features will be turned
off once again. The LED light will turn off to reflect this change.
Irrespective of how many times you press the amplify key
throughout a call, the next time you pick up the handset, these
functions will be turned off once again.
Tone Receiving Adjustment
If the receiver volume has been amplified, the tone control can
also be adjusted. You can adjust and increase the low frequency
or high frequency sounds with the tone slide control on the top of
the unit.
Note: The tone adjustment function will not be affective when the
receiver volume is set to normal level.
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