User Guide
Grandstream Networks, Inc.  GXP User Manual  Page 25 of 44 
       Firmware 1.2.5.3     Last Updated: 03/2011 
•  SIP 
To change SIP-server settings for primary account. 
•  Upgrade 
In this menu setting regarding the firmware server and Config 
server can be changed. It also enables the user to make the 
phone attempt to download new firmware.  
•  Multi Purpose Key (On GXP2000/2010/2020 only) 
To configure multi-purpose keys. 
•  Factory Reset 
Key in the physical/MAC address on back of the phone.  
Press Menu button to reset FACTORY DEFAULT setting. Do not 
use Factory Reset unless you want to restore factory settings 
•  Layer 2 QoS 
Configure Vlan Tags 
Press ‘←’ to return the main menu. 
Factory Functions 
Press Menu to display the factory function items including 
• 
Audio Loopback 
Speak into the handset. If you hear your voice in the handset, 
your audio works fine. 
Press Menu button to exit the mode. 
•  Diagnostic Mode 
All LEDs will light up 
Press any key on the keypad, to display the button name in the 
LCD. Lift and put back the handset or press Menu button to exit 
the diagnostic mode. 
•  Enable WDT 
Toggles the status of the Watchdog Timer. 
Press ‘←’ to return to the main menu. 
Reboot 
Press Menu button to reboot the device 
Display “Exit” 
Press Menu button to exit the menu  
Exit 
Exit from this menu. 










