Telephone Operations
The Clarity Power is turned on by pressing the BOOST button as described in the next section.
FLASH
BOOST 
CLARITY
POWER
Figure 9
E. Boost Button
Press the BOOST button to turn the amplifier on.When BOOST is on, it returns to your previous amplifica- tion setting and a red light will illu- minate in the ring flasher area.When you hang up the handset, it automati- cally turns off the amplifier.
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Figure 10
F. Ringer Volume
You may adjust the ringer volume of your P400 phone to suit your needs.When set on high, the ringer produces a tone that reaches approximately 75 decibels.
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Figure 11
G. BOOST ON/OFF Switch
This switch will disable the reset feature of the BOOST Clarity Power button as follows:
(Located on the bottom of the base)
ON – When the Boost ON/OFF switch is set to “ON”, the Boost function will be ON every time a call starts, and will default to ON every time the phone hangs up. During a call, the BOOST Clarity Power button can toggle the Clarity Power ON or OFF according to the user’s needs.
OFF – When the Boost ON/OFF switch is set to “OFF”, the Boost function (Clarity Power) will be OFF every time a call starts, and the user will need to press the BOOST Clarity Power button in order to gain the extra level of amplification. If the phone hangs up, the Clarity Power will reset to OFF. During a call, the BOOST Clarity Power but- ton can toggle the Clarity Power function ON or OFF according to the user’s needs.
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