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The TYT USB programming cable connects to the speaker/microphone jack on the HT and USB on the PC. It uses a chip that is specific to this radio, requiring a specific driver.The TYT USB programming cable connects to the speaker/microphone jack on the HT and USB on the PC. It uses a chip that is specific to this radio, requiring a specific driver. When plugged into the computer the Tytera programming cable does not appear as a comm port. Also unlike the Prolific cable the this Tytera cable does not seem to have any chip logic in the cable. No device appears in windows device manager until the radio is connected and powered on, indication that the chip is in the radio. You will need to install the DM-380USB_Driver in order to use this cable and program the radio from a PC. [[File:tyt_MD-380_USB_STMDev.jpg]] With the driver installed once connected to the computer and the radio powered on, windows device manager (devmgmt.msc) will show a new device under Universal Serial Bus Controllers. The device description is "STM Device in DFU Mode". Look for the presence of this device in windows device manager to verify that you have the proper driver installed, and that the computer able to communicate with the radio.