On your Mac/PC you use the dtv2sertrans tool to talk with the dtv2ser device and to down- or upload data to the DTV. It works similar to the client tool available in TLR’s dtvtrans, but already has some extensions:

dtv2ser Documentation

• README
• Change Log
• dtv2sertrans Command Line Options
• dtv2sertrans Examples
• dtv2sertrans JoyStream, AutoType and Bootstrap Features
• dtv2sertrans Flash Features New!
• dtv2ser Protocol Specification
• dtv2ser Device Setup
• dtv2ser+usb Device Manual
• dtv2ser+usb Device Parts List