Sorry if I am asking an unrelated question but I simply don't know where to ask that. A smart card forum looks good for me ;) It is a little specific question about the smart cards' menu systems.
As far as I know every CAM cards have a menu structure in them. (let's say which are compatible with CI if there is such a thing like that)
Some of them pops in your television's own menu like it's the part of your TV menu (which is called High-Level Man Machine Interface)
Some of them opens a menu on your television by overlaying the menu that has been already saved in CAM/card (or maybe even in full screen mode). (which is called Low-Level Man Machine Interface)
I don't know if there are CAM/card slots without CI support but that's a requirement of Common Interface.
And I wonder if every CAM/card support both High level MMI and Low level MMI.