OK than makes sense even though the MTH TIU can be connected to a SER 2 module. The communication is one way from the TIU to the SER2.
This means that to control a switch via DCS handheld the switches are connected to an AIU; and to also control them from an IPad you would need a ASC2 connected to the same switch ( unless it is a TMCC switch).
So what Z-Stuff would need to do is make TMCC connector to its switches. Is that the