User's Manual
GXV3240 User Manual 
MAKING PHONE CALLS 
Grandstream Co., Ltd 
Software Version:1.0.0.11 Document Version:0.1 
47 
MUTE 
1.  During an active call, press the Mute button to mute the call. This operation would disable 
the other party to hear his own voice. As shown figure 35 below: 
Figure 35 GXV3240 Call Mute 
2.  Press the Unmute button to cancel mute. 
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