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After updating the WTIU with the most recent firmware Version 1.3, the WTIU can be connected to the Lionel TMCC Command Base.
To connect the WTIU to the Lionel TMCC Base, use the WTIU/TMCC-Legacy Command Cable 50-1042. Plug the USB A end of the cable into the side of the WTIU and the DB9 end of the cable into the back of the Lionel TMCC Command Base.