The red-circled part is the one I'm looking at. In particular, what is the meaning of the different connections between 4-5 and 7-8 for example for "plug not inserted?" And the different, but symmetrical, connections for "plug inserted?" I can't find any obvious reference to these anywhere else on the datasheet.
Pins 1, 3, 11, 10, and 2 make sense to me from the diagram (in red circled area), but these others are puzzling. Can someone shed some light on this, please?