Int 14 Fn E2  - Telapi - Buffered Read                                     [N]

   AH = E2h
   BX = connection ID
   CX = length of buffer in bytes
   ES:SI -> buffer for data

Return: AX = number of characters actually read??? (negative on error)

See Also: AH=E6h,AX=FF00h,INT 6B/AH=01h