[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]
Re: Serial console on second port?
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
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 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
Main Index |
Thread Index |