Then I do not think you have a null modem cable.   Can you ohm out the cable (from end to end including adaptors since is looks like you have at least one adaptor)?  Pin 2 on one side should be connected to pin 3 on the other and ping 3 should be connected to ping 2.
Hello, i'm having problems to reset the switch. I can't access to the administrator web portal... it show Access was denied due to one of the following reasons:1) There are too many users logged in    or2) The specified user name and/or password is incorrect   or3) The specified user has not been granted web administration privileges I "reset" the switch with the reset buttom but it seems that only a reboot is doing. Some ideas? Thanks, Gustavo
POWERCONNECT 3424 reset