Re: Serial console on second port?

[Johnny Billquist <bqt%softjar.se@localhost>]

Patrick Finnegan wrote:
> On Monday 30 March 2009, Johnny Billquist wrote:
> > One nice property of MMJ is also that for a null-modem cable, you
> > should connect 1-6, 2-5, 3-4. So it's symmetrical. So the easy way to
> > see if a cable is a null-modem cable is just to inspect the
> > connectors. If they are turned the same way at both ends, it's a
> > null-modem cable, and if they are the opposite ways, it's a straight
> > cable.
>
> By design, also, all MMJ cables should be null-modem.  If you have to 
> convert to DE9 or DB25 serial connectors, there's different adapters 
> for DCE and DTE so that you always use a roll-over MMJ cable instead of 
> a stright through one.

Unfortunately when people make their own cables and installments, they 
occasionally don't follow this. I've come across cables with MMJ 
connectors that were straight. :-(
So it's probably good to pay attention.

        Johnny

--
Johnny Billquist                  || "I'm on a bus
                                  ||  on a psychedelic trip
email: bqt%softjar.se@localhost             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol