Mike Johnson wrote:
Jason Tower wrote:
i'm looking for a female db9 to male db25 null modem cable (to connect my laptop serial port to a sun sparcstation serial port). if anyone has one lying around i'd appreciate it. thanks,
Jason,
I always used a db9 to db9 cable, a db9 to db25 adapter, and a null modem adapter. A little clunky, but easier to find than the cable you're looking for.
Mike
Intrex, null modem cable + gender bender.
Normally, if the people who designed your hardware understood how serial ports should be built (DTE is male, DCE is female), then a null modem cable should only be needed when the ends couldn't physically be plugged into each other (i.e. attempting to connect two female ports together, or two male ports together). That's what the null modem cable you'll find at Intrex (or virtually any other null modem device) should have the same gender on both ends (in Intrex's case, female - as connecting two computers together is the most likely scenario, as opposed to connecting two modems together). So for the strange scenario you're suggesting, you'd require both a null modem cable and a gender bender (ie. a male <-> male connector). As a curious question, have you tried just plugging the two directly together, or using a regular serial extension? It probably won't work, even though the orientation of the connectors implies that it should. For more information on DTE (Data Terminal Equipment) vs DCE (Data Communications Equipment), check out the RFCs for RS-232 Serial.
Aaron S. Joyner -- TriLUG mailing list : http://www.trilug.org/mailman/listinfo/trilug TriLUG Organizational FAQ : http://trilug.org/faq/ TriLUG Member Services FAQ : http://members.trilug.org/services_faq/ TriLUG PGP Keyring : http://trilug.org/~chrish/trilug.asc
