Clarity A Division of Plantronics Inc. C600B ユーザーズマニュアル

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Set the switch marked Ringer OFF/VIBE/ON located 
on the side of the handset. When VIBE is selected 
the handset will ring and vibrate when receiving and 
incoming call.  The ringer switch must be set to ON 
or VIBE for the handset  
to ring.

Note: If both handset and base ringers are set to 
OFF, the visual ringer will flash to indicate there is an 
incoming call.

Slide the switch to the type of telephone service you 
have; TONE for touch-tone service or PULSE for 
rotary dialing. Please check with your local telephone 
company if uncertain of the type of service.

The FLASH button is activated to use custom calling 
services such as Call Waiting or Three-Way Calling. 
Please contact your local telephone company for 
information on these services. 

The MUTE button allows the user to conduct a  
private conversation that you do not want the 
person on the other end to hear. While in the mute 
mode, the MUTE button will illuminate RED and the 
microphone in the handset is disabled. Pressing the 
MUTE button again will disengage the MUTE feature.

Press the RD/P button to redial the last number 
dialed.  Pressing the RD/P button while storing a 
telephone number will insert a four (4) second 
pause.  This is commonly used when storing both the 
telephone number and an extension or PIN number.  

The base ringer volume adjustments are located on 
the side of the telephone base.

Pressing the UP (

▲

) key on the base increases the 

ringer sound by one level while pressing the DOWN 
(

▼

) key reduces the sound by one level. There are a 

total of six levels from maximum to minimum. The 
ringer will sound for two (2) seconds while choosing 
a ringer volume, to allow the user to make a choice. 

The base ringer style adjustments are located on the 
side of the telephone base. The style of ring can be 
adjusted by pressing the RING STYLE button. Six (6) 
styles are available allowing you to customize your 
ring.  The ringer will sound for two (2) seconds while 
choosing a ringer style, to allow the user to make a 
choice.

Visual ringers are located in both the handset 
antenna and the base of the telephone. When an 
incoming call is received, these lights will flash. The 
handset visual ringer will also stay lit while the phone 
is in use.

This switch will disable the reset feature of the 
BOOST Clarity Power button as follows:

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.