*** The CCP is awesome.  It has detailed info about each router, along with the best diagrams I have ever seen of the backs of the routers. It is only available on the Cisco Australian site, but I found that I was able to download it also. You download the exe file, and run it. After that, just place a shortcut to the main html file: "c:\program files\cpp  reference guide\bookmark.htm" on your desktop, and you have instant access to all the Cisco products in detail.