Int 14 Fn A3  - Interconnections Inc. Tes - Start A New Session            [S]

   AH = A3h
   ES:SI -> ???

Return: CF clear if successful
       AX = 5445h ('TE')
       CX <> FFFFh
       DX = port number
   CF set on error

See Also: AH=A1h"TES",AH=A4h"TES",AH=A6h"TES"