1. Connect the USB cable and power off the DP Handsets.
2. Power on the DP Handset and wait for the Green LED.
3. Press 3 times Central Key (OK/Selection Key) quickly after the Green LED is on.
4. Press the Speaker Key (left bottom) first and then the Mute Key (right bottom) after the Red LED is on.
5. DP Handset LED will start blinking in 3 colors: Green, Red, and Orange if the factory reset successfully triggered.
6. Wait for about 1-3 minutes, the DP Handset will boot up with the setup wizard for initial language and date format
settings.
CHANGE LOG
This section documents significant changes from previous versions of the user guide for DP730/DP722/DP725/DP725. Only
major new features or major document updates are listed here. Minor updates for corrections or editing are not documented
here.
Firmware Version 1.0.3.8
Product Name: DP755
Added support to increase the TX volume in handset mode. [Audio & Vibration]
Firmware Version 1.0.3.7
Product Name: DP755
No major changes.
Firmware Version 1.0.3.4
Product Name: DP755
Default ringtone changed to Ring 8. [Default Ringtone]
Set “menu timeout” to be disabled by default. [Change Menu and LCD Timeout]
Added ability to configure HTTP/HTTPS username and password from handset for provisioning. [Provision Auth]
Firmware Version 1.0.1.16
Product Name: DP755
No major changes.
Firmware Version 1.0.1.15
Product Name: DP755
Handset firmware can NOT downgrade to 1.0.19.15 or below. [Handset Firmware]
Firmware Version 1.0.1.13
Product Name: DP755
This is the initial version.
Firmware Version 1.0.21.10
Product Name: DP752/DP750
No Major changes.
Firmware Version 1.0.21.6
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