Gender changers can be a nigthmare because, as FAQ mentions, 'that it
plugs doesn't mean it's going to work'.
If you miss any doc about serial port standards of any of the devices,
then take a multimeter and measure the voltage between pin 7 -if DB25-
or pin 5 -if DB9- and pin 2 of the cable; it should read anything <= -5
volts. If pin 2 on the wire as negative voltage, the same must be true
for the pin 3 of the UPS. If wire and UPS have negative voltage on the
very same pin, you're missing a 'null-modem' cable: go for it.
If these values are ok, it's almost sure we're talking about a software
issue.
Thanasis escribio':
on 06/10/2009 12:34 PM Thanasis wrote the following:
on 06/10/2009 11:53 AM Daniel Gracia Garallar wrote the following:
Are you running the program with a user with dialer privileges? First,
make sure your account has dialer privileges -is part of dialer
group-. Then Shortcut pins 2 and 3 of your black cable while connected
to the pc, and try on a shell 'cu -l /dev/ttyb'. If serial port is
working, any keyboard stroke should be echoed in screen.
Yes it echoes!
So /dev/ttyb must the the device for the port.
That's one step closer to solve the problem. :-)
I don't know if that matters, but let me add that the connection between
the sparc machine's port and the ups' port consists of two cables and a
gender changer in between, like so:
On the sun's port side the plug is a DB25 and the other end on the same
cable in a DB9. This RS232 DB9 is connected through a "gender changer"
to the UPS' black cable which is DB9 on both ends.
Gender changer is DB9 male/male:
http://www.partsdata.co.uk/Gender_changer_2x_DB9_male_K-100.html
I hope it's clear ...
