I have an Octel 250 as well and if I am correct which is rare, your screwed, unless you know a really good hacker. As for Avaya, if you bought it from them then you should be able to contact the sales rep and kick his butt. But do let me know what happens anyway, especially if you find out how to get that damn Super Admin Password that Avaya never wants you to know about.
Good luck.
