to connecting instrument via rs232 to Digi transport WR31 which cable we use, strait or cross cable?
Hi
the wr31 is a DCE device
http://ftp1.digi.com/support/cabling/dte_vs_dce.pdf
so it will depend on what you are connecting to
normaly a straight cable if the other end is DTE
this will also depend on the standard and the pinout on the actual interfaces
here is a link to the user guide