Switchbox, Centronic 36 ABCD, Rotary pin outs

[Jimmy9]

Hello, i have a question about these type of switch boxes....

http://www.worldofcables.com/store/viewItem.asp?idProduct=813#

I needed to use 30 direct line connection for a simple project and i was wondering before i bought this switch are all the lines in centronic 36 pin switches all direct lines or are there common connections in there?