Grandstream Networks DP752 Administration Manual page 113

4. Press "Yes" (left softkey) to confirm and the phone will reboot.
To cancel the Reset, press "No" (right softkey) instead.
Users also can perform factory reset using combo keys on DP730/DP722 during booting up prior it's fully
booted, to give DP730/DP722 the ability to recover from some extreme cases like self-reboot or stuck right
after booted up.
Please refer to following procedure for DP730/DP722 factory reset using combo key:
1. Connect the USB cable and power off DP730/DP722.
2. Power on DP730/DP722 and wait for Green LED.
3. Press 3 times Central Key (OK/Selection Key) quickly after Green LED on.
4. Press Speaker Key
5. DP730/DP722 LED will start blinking in 3 colors: Green/Red if factory reset successful triggered.
6. Wait for about 1-3 minutes, the DP730/DP722 will boot up with setup wizard for initial language and
date format settings.
first and then Mute Key
DP752/DP730/DP722 Administration Guide
Version 1.0.11.4
after Red LED on.
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