RS232 terminal wiring - Garion where you at?

[spidey07]

I seem to remember a web site that provided a very good, detailed plan for structured RS232 cabling. Used cat 5 but the adapters and pinouts were standardized to provide a consistent DTE/DCE pinout male and femail both.

So, any body remember where this is? I'm trying to help out the NOC manager wire some 50 sun boxes, moving a terminal around just isn't cutting it any more and he's hooking up a "lantronix" terminal server.

I know...I tried to tell him just to get a cisco router with boatloads of async ports. Not my call though.

thanks!

 

[Garion]

What kind of suns? I've mostly been working with the smaller app machines lately (X1's T1's, etc.). They have a standard RJ48 serial port that a RJ->DB9 adaptor works on.

One SERIOUS word of warning - A lot of terminal servers send a BREAK to the under some circumstances, like when they are shut down. This will, of course, totally hang a Sun server unless you've applied a specific set of patches. Make SURE you make the right updates, or you'll be very sorry...

For the pinouts, look here for pinouts for a DB25 serial on a Sparc5 (but should be the same on newer products). Hit the Lantronix site to get the pinouts for their serial connectors, head to Greybar for some unpinned RJ->DB25 adapters and start to have fun. Just don't forget to buy the pin insertion/removal tool while you're there!

- G

 

[spidey07]

thanks garion. I thought you could purchase a whole bunch of adapters - DB9 terminal, DB9 modem, DB25 terminal, DB25 modem, male and female. Then depending on the application you could just pick the correct adapter based on DTE/DCE.

There was a webpage out there that described a very good way to "structure" all of this.

OH, I wouldn't mess with patching the suns. that's for the server boys to do. 🙂