Clarity A Division of Plantronics Inc. C4210B ユーザーズマニュアル

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The C4210 cordless telephone automatically 
searches and selects the clearest of 40 channels 
when it is being used. If interference develops on the 
line, pressing this button will move to  
another channel. 

The security code prevents your cordless phone 
conversations from being accessed by a phone on 
a different line. Once the handset battery is fully 
charged, the handset will automatically select the 
code from over 65,000 different combinations. The 
code is changed every time the handset is placed in 
the cradle. If you have trouble with placing or receiv-
ing calls, a lost security code may be the cause of 
the problem. When this occurs, the handset can no 
longer communicate with the base. 

1.    Unit must be in standby mode only.
2.    Press MODE key twice. The LCD will show  
 

PHONEBOOK. 

3.    If the phonebook is empty, after 1 second the  
 

display shows - NO RECORDS -.

4.    Otherwise, the display will show the first  
 

alphabetical record with the record number  

 

on the top icon line. The record number may  

 

not be the first one.

5.    Press the UP (

▲

) or DOWN (

▼

) button to go  

 

to the next record. Or select any other alpha- 

 

betical list pressing “2” to “9” key.

6.    When at the end of the list, pressing DOWN  
 

(

▼

) button will show END OF LIST. Press the  

 

UP (

▲

) button to go to the last record.