From DVDO link on the 1070 thread: "Other USB to Serial Adapters may also work but they must be based on the FTDI chipset. Some popular brands that are not suitable are Belkin, Keyspan, Prologis and Codi."

And even the FTDI ones seem to have a problem now with most recent driver. So, the only sure way is to use an adapter using the FTDI chipset with a denigrated driver.