RS-232 Connectors?

[cato]

Are the pin outs shown here :<p>http://hydraulicslab.ucsd.edu/RS232/rs232.htm<p>Correct?<p>I was under the impression that the pin numbers alternate sort of like this:<p>1 3 5 7 9 11
2 4 6 8 10 <p>and not as they are shown on that web page.
If you agree with me and can back it up with a web page diagram, I'd be grateful<p>Also, can you direct me to information regarding the voltage levels on the pins.<p>I"m measuring 11.5V on one pin (referenced to chasis) and -10.5 on another pin. <p>(I'm trying to get my computer to talk to a MFJ TNC on COM 4 by the way, and am having no luck)<p>Thanks

[greg123]

The link you provided is correct. See here for confirmation:<p>http://www.lammertbies.nl/picture/db9_pin_name.gif
http://www.airborn.com.au/rs232.html<p>The Voltage levels for RS232 are +12 and -12, also uses negative logic meaning that a 1 or logic High is -12 and a 0 or logic low is a +12.<p>Greg

[cato]

Thanks Greg!