Magtek DynaFlex II Go Programmer's Manual page 142

6 - Commands
3) The host creates an instance of Command 0xEEEE - Send Secured Command to Device in the
format below, and includes the Message Payload and Challenge Token inside it. In the Request
Message, it fills in Command ID as the command number of the wrapped Message Payload, instead
of 0xEEEE. Some parameters are command-specific; see the documentation for the command that is
being wrapped to determine what values to use.
4) The host sends the resulting composite command request to the device.
5) The device validates the serial number and challenge token, then examines the parameters to
determine which authentication method is being used, and authenticates the command accordingly.
6) If the device determines the command request is authentic, it will start executing the secure command
defined by the Message Payload.
7) The device sends a response to the host reporting success or failure. In both cases, the response uses
the format that corresponds to the command invoked by the Message Payload. See the
documentation for that command to determine the format of the response.
DynaFlex II Go| Secure Card Reader | Programmer's Manual (COMMANDS)
Page 142 of 301 (D998200597-102)