Grandstream Networks, Inc. GXP21xx User Manual Page 41 of 41
Firmware version: 1.0.1.66 Last Updated: 05/2011
WARNING: Restoring the Factory Default Setting will delete all configuration inform ation of the phone.
Please backup or print all the settin gs before you r estoring fac tory default s ettings. W e are not respons ible
for restoring lost parameters and cannot connect your device to your VoIP s ervice provider.
INSTRUCTIONS FOR RESTORATION:
Step 1: Press “OK” button to bring up the keypad configuration menu, select “Config”, pr ess “OK” to
enter submenu, select “Factory Reset” (Please refer to Table 5-1 of ke ypad flow chart)
Step 2: Enter the MAC address printed on the bottom of the sticker. Please use t he following mapping:
0-9: 0-9
A: 22 (press the “2” key twice, “A” will show on the LCD)
B: 222
C: 2222
D: 33 (press the “3” key twice, “D” will show on the LCD)
E: 333
F: 3333
Example: if the MAC address is 000b8200e395, it should be key in as “0002228200333395” .
NOTE: If there are digits like “22” in the MAC, you need to type “2” then press “->” right arrow key to
move the cursor or wait for 4 seconds to continue to key in another “2”.
Step 3: Press the “OK” button to move the cursor to “OK”. Press “OK” button again to conf irm. If the
MAC address is correct, the phone will reboot. Otherwise, it will exit to pr evious keypad menu interface.