Serial rs232 on RV55

Trying to wire up a MDS transnet 900mhz radio rs232 to the DB9 port on the sierra DB9 port
I believe all of my settings are correct, is there a specific cable to use? Straight cable? Null modem?
Any special settings you guys can share from screen captures. TIA!!

Hi @koby.f,

Welcome to our community!

Please refer to the Serial Port section on pages 21-22 of the following document: