# to connecting instrument via rs232 to Digi transport WR31 which cable we use, strait or cross cable? **URL:** \ **Category:** Digi TransPort WR (Series)\ **Tags:** via, instrument, re232\ **Created:** [December 20, 2018, 5:13pm UTC](https://forums.digi.com/t/to-connecting-instrument-via-rs232-to-digi-transport-wr31-which-cable-we-use-strait-or-cross-cable/20119 "2018-12-20T17:13:14Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![priyadi](https://avatars.discourse-cdn.com/v4/letter/p/2bfe46/32.png) [@priyadi](https://forums.digi.com/u/priyadi)\ **Post date:** [December 20, 2018, 5:13pm UTC](https://forums.digi.com/t/to-connecting-instrument-via-rs232-to-digi-transport-wr31-which-cable-we-use-strait-or-cross-cable/20119/1 "2018-12-20T17:13:14Z")
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**Author:** ![James.Wilson](https://avatars.discourse-cdn.com/v4/letter/j/53a042/32.png) [@James.Wilson](https://forums.digi.com/u/James.Wilson)\ **Post date:** [December 21, 2018, 6:25am UTC](https://forums.digi.com/t/to-connecting-instrument-via-rs232-to-digi-transport-wr31-which-cable-we-use-strait-or-cross-cable/20119/2 "2018-12-21T06:25:57Z")
Hi the wr31 is a DCE device [http://ftp1.digi.com/support/cabling/dte\_vs\_dce.pdf](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 [https://www.digi.com/resources/documentation/digidocs/90001019/default.htm#references/r\_transport\_wr31\_serial\_pinout.htm?Highlight=serial](https://www.digi.com/resources/documentation/digidocs/90001019/default.htm#references/r_transport_wr31_serial_pinout.htm?Highlight=serial) [http://ftp1.digi.com/support/cabling/signals.pdf](http://ftp1.digi.com/support/cabling/signals.pdf)