I have used Visio, edraw and some others and have not found what i am looking for.
I am looking for the 3d layout drawing software that builds topographies like this:
http://www.avocent.it/web/en.nsf/AttachmentsByTitle/SPC420_ACS_config.jpg/$FILE/SPC420_ACS_config.jpg
or this
http://www.42u.com/images/avocent-dsr800-diagram.jpg
thanks in advance.

I use Illustrator, CS2 make 3D effects, like extrude, revolve etc.