cams for std. digital tv's?

[baz-r]

cams for sat boxes have been around for ages now and more and more digi tv's have CA slots to take a topup cam and card

i was thinking has anyone got/know if any of the cams on the market (eg. magic, matrix) can work in the tv's to decode topup channels ,

im sure you know where im coming from

if there are any sites that have any kind of info please do post any url's in here

[Analoguesat]

Tits Up TV is secure so the only way to view whats left of the service is via subscription.