User's Manual
Grandstream Networks, Inc. GXV3140 USER MANUAL  Page 21 of 83 
 FIRMWARE VERSION 1.0.1.18 Updated : 09/2009 
NOTE: 
• To transfer calls across SIP domains, SIP service providers must support transfer across SIP domains. 
Blind transfer will usually use the primary SIP profile. 
• If the user enters the wrong number and wishes to cancel the transfer, just press the “CALL TRANSFER” 
button again to cancel the transfer or press the “HOLD” key to hold the line and retry again. 
3-WAY CONFERENCE 
The GXV-3140 supports 3-way conferencing. 
1. Initiate a Conference Call: Place the first call on hold by pressing the “LINE” button to call the second 
party. Once you establish the call, press the “CONFERENCE” button then select the line on hold to bring 
three parties together. 
2. Cancel Conference: If after pressing the “CONFERENCE” button, a user decides not to conference 
anyone; press the corresponding FUNCTION key for “Cancel” to cancel the conference.   
3. End Conference: There are two ways to end a conference. The first way is to press “HOLD”, this 
breaks the conference and places both parties on hold, and the user can now speak to individual party by 
selecting the corresponding LINE. The second way is to simply hang up and terminate the call. 
VOICEMAIL(MESSAGE WAITING INDICATION) 
If the blue MWI LED icon is flickering on the upper right hand corner, it means that a new message is 
waiting. Press MSG 
 to retrieve the message (the button needs to be configured). By default, 
pressing the MSG button will transfer to the voicemail box of Line1; if the user wishes to enter the 
voicemail box of Line 2 or Line 3, the corresponding Line should be selected prior to pressing the MSG 
button. The IVR prompts the user through the message retrieval process 
Note: Each of the 3 lines has its own voicemail; the Voicemail number for each number may be set up in 
the “Voicemail ID” configuration. 
MUTE 
1.  During a call, the LCD screen will display “Mute”. Press the corresponding FUNCTION button to mute 
the call. 
2.  After the “Mute” button is pressed, the LCD screen will display “Unmute”, when this button is pressed, 
the mute feature is cancelled. 










