The “AMPLIFY” button controls the increased volume level and tone equalizer of the handset.

1.Press the volume (P or Q) button to minimum, pick up the handset and press the amplify button to turn on the incoming voice amplifier . The indicator around the button illuminates.

2.Adjust the volume by pressing the volume (P or Q) button. When the amplify button is pressed , an extra level of amplified volume is added providing up to 40dB of gain and level control. In standard use, the amplifier turns off whenever you hang up the telephone. If you want the amplifier to turn on whenever you pick up the handset , slide the Amplify Override switch located at the back of the unit to ON.

NOTE: AMPLIFY feature is possible in both Handset and Speaker Mode.

WARNING: This Product is designed for users with hearing disabilities and automatically amplifies the volume to the highest level when the Amplify Override switch is set to “ON”. If you wish to prevent the automatic amplification, please turn the Amplify Override switch located on the back of the set to “OFF”.

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Grandstream Networks 29578 manual