The first thing you see when opening the dialing options page is connect to Lifesize Cloud from your browser. There is a small arrow pointing down indicating there is more to see. There are also links at the top of the page.
From a practical point of view, it would be more straightforward and obvious if the first thing you see really are all the various options to join. Rather than requiring you to scroll or click on links to see all the available options. Not everyone has the patience to discover.