Clarity c4210 User Manual

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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.”

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.

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.

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.  Remove batteries from desk/wall  
 

mount bracket.

4.  Install four (4) AA Alkaline batteries with  

 

 

negative (-) end of battery touching  

 

the spring.

5.  Connect battery back-up connector to  
 

terminal on bottom of telephone base

6.  Install desk/wall mount bracket to  
 

telephone base

After installing the four (4) AA Alkaline batteries 
please refer to the chart below:

Power Supply 

AC adapter and 

Steady Green  

good batteries

AC adapter and 

Steady Red 

no batteries

AC adapter and 

Flashing green and red 

bad batteries

Power failure and 

Slow flashing red 

good batteries

Power failure and 

Fast flashing red 

bad batteries