On Thu, 5 Jun 2003, Feldman, Robert wrote:
It might be that the DE-9's don't have a
standard PC serial pinout. At
work, we have a UPS that uses a DE-9 for programming, but the pinout on
the cable (a 940-0024C; Googling produces a number of hits) is
Female Male
1-4
2------------2
3------------1
5------------6
6 NC
7-8
9 NC
Let me guess...APC? :)
Their ports are very fun, since if you plug in a standard serial cable,
and open the port, it can turn off the UPS. The UPS' port supports both a
dump-mode DTR/RTS/etc signaling as well as a smart-mode.
The cable above is their "smart" cable. The 1-4 and 7-8 connections are
also not needed if you are not using 3rd party software such as NUT, as
they are just loop back connections.
-Toth