You no what cable RS232 use?
You have 2 types of cable:
2-2
3-3
4-4
5-5
6-6
7-7
8-8
or
2-3
3-2
4-4
5-5
6-6
7-7
8-8
I think you are using the wrong cable to connect your crappy Metronic TouchBOX 2.
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