Clarity C4210 - Manual (Page 22)

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OFF – When the BOOST ON/OFF switch is set to
OFF, the Boost function 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 button can toggle the Clarity Power
function ON or OFF according to the user’s needs.
CAUTION: VOLUME WILL BE LOUD
WHEN BOOST SWITCH IS SET TO “ON.”
Battery Back-up
Installing four (4) AA Alkaline batteries into the
desk/wall mount bracket attached to the telephone
base will offer you a limited amount of time to con-
tinue operating your telephone in the event of
a power failure.
To Install Battery Back-up Batteries
1. Disconnect telephone line cord and
remove desk/wall mount bracket from
telephone base.
2. Disconnect battery back-up connector from
the telephone base.
3. Install four (4) AA Alkaline batteries
with negative (-) end of battery touching
the spring.
4. Connect battery back-up connector to
terminal on bottom of telephone base.
5. Install desk/wall mount bracket to
telephone base.
FEATURE SET UP