if your switch passwords have never been changed then you should be able to use administrator/administrator....or refer to the users manual, it has all the origional passes in there, if it has been changed,,,,,,,GOOD LUCK. Trying to find a tech anywhere in the U.S. who has a cable to connect to the programming port is impossible. 3com never released them to their contracted techs. as for 3com, i would advise anyone who reads this DO NOT BUY 3COM, I have a service contract, and its been now over a YEAR and I still have not recieved an email or phone from my email to them about the problem. so good luck. and if anyone wants a superstack 2 i now have 2 of them sitting in my house ill get rid of them for a very fair price, they both work as switches, you just can't get in them to change the settings. if you have any more questions please reply to this and ill be glad to help as much as i can