User's Manual
GXV3240 User Manual 
MAKING PHONE CALLS 
Grandstream Co., Ltd 
Software Version:1.0.0.11 Document Version:0.1 
48 
VOICE CHANNEL SWITCH 
Figure 36 GXV3240 Call Interface 
1.  Press  the  hardkey
  to  switch  to  Headset  mode;  Off  hook  to  switch  to  Handset 
mode;Press the hardkey 
  to switch to Speaker mode.   
2.  When  the  user  is  speaking  via  one  voice  channel during  an  acticve  call,  press  again  the 
corresponding button of this voice channel to hang up the phone. Figure 37 shows speak via 
headset. 
Figure 37 GXV3240 Speak via headset 
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