I tried Google translate on the quoted text above(which is in Norwegian):
Hello,
I have FTDX5000mp connected to com 2 Then I connect from COM 1 to OM3500a and from OM PA to PC.
I lose communication to ON step and of course the PC.
Baud Rate is set to 9600, both on radio, on, PC and COM1 and 2
Have tried with regular rs232 cable and 0 modem cable, but NIL.
I look at the manual that pin 2-3 must be crossed and the same with 7-8
The RRC is the mode set to 7
Anybody can help me?
73 / Thu La3waa
It made it in my opinion rather understandable. I don't know about the translation to German though.