DP750/752/760 Release Notes
DP750/752/760 1.0.19.3 Firmware Files
HTTP Firmware upgrade path for BETA release is:
firmware.grandstream.com/BETA
Note:
DP730/DP722/DP720 firmware can be upgraded once the connected DP750/752 base is upgraded to new firmware. The firmware version on DP730/722/720 will be the same as the base after upgrading.