@Madskap: Thanks again for hinting me to the Beolink handbook. Did not think about that. The panel has a built in IR receiver, so I prefer to establish a direct connection between the BSys and the panel for IR control. There is also a specific cable for connecting the BSys 3 (Monitor control) and the panel. In this case I would need a rj-45 to DSUB9 cable for connecting to the BSys 4. I can find one from Panasonic on the internet, but it seems to be available on the Japanese market only, and I do not know, if it will be the right one.
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