UDACT-300/DTC-300 Dialler Firmware (MD-1210 Core Board) (v3.0.25)

This is the UDACT-300A/DTC-300A firmware v3.0.22 for diallers using the MD-1210 or MD-1210-19 core board. This requires the Firmware Upgrade Utility to be installed on the computer to transfer the file to the dialler board.