On Sun, 27 Mar 2011 19:30:49 -0400 (EDT), ow...@netptc.net wrote: > On Sun, 27 Mar 2011 14:41:37 -0400 (EDT, Stephen Powell wrote: >> >> That's true. But a properly-wired cross-over cable or null modem >> not only crosses over TD and RD but also crosses over DTR and DSR >> and also crosses over RTS and CTS. Ground, of course, is wired >> to Ground. CD is normally tied to DSR on the same side of the >> interface (on both sides). RI is usually left unconnected. >> >> See, for example, >> >> http://en.wikipedia.org/wiki/File:D9_Null_Modem_Wiring.png > > Yes Stephen that's the "traditional approach". Unfortunately > there are at least half-a dozen non-standard configurations > (e.g. permanent RTS, connecting DSR to DTR) which drive RS-232 > people nuts. I agree that the place to start is with your > traditional cable or with a null modem adaptor (essentially a > black box that does all the interconnections for you, allowing > straight through cables from either side to the boxes) but beware > this may not work in all situations.
I agree. Special situations may require special wiring. As I said in another post, the devil is in the details. -- .''`. Stephen Powell : :' : `. `'` `- -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/2019024296.1757667.1301273806216.javamail.r...@md01.wow.synacor.com
