User's Manual
Grandstream Networks, Inc. GXV3140 USER MANUAL  Page 67 of 83 
 FIRMWARE VERSION 1.0.1.18 Updated : 09/2009 
make sure that you have plugged in the external output source before selecting this option. To 
return the display to the LCD menu, log into the web browser interface and disable TV Out in 
“Device Manager” -> “TV Output”. Otherwise, you will need to reboot the phone to enable the 
LCD screen. 
z  MAINTENANCE 
There are three tabs on the Maintenance setting screen: Upgrade, Factory Functions and 
Debug. Users can configure the upgrade mode and firmware server IP address/URL on the 
upgrade tab. Once this is saved, users can choose to reboot the phone to upgrade the 
firmware. Similarly, a factory reset can be performed on the Factory Functions tab. A more 
detailed step-by-step guide will be given in the “Restore to Factory Default Settings” section 
that follows. 
The Factory Functions page provides some testing diagnostics for the LCD, camera and 
audio on the GXV3140. (As shown in the figure below) 










