A straightforward question could have many answers, all being correct.
I have recently acquired an Ouverture which is connected to a MX7000. In order to obtain full functionality, since the MX 7000 do not have Masterlink, I have a Beolink Converter between the two:
Ouverture --- Masterlink Cable --- Beolink Converter --- 7-pin DIN cable --- MX7000
In this setup, I believe MX 7000 can be replaced by all MX and LX TVs.
With MX8000/MX4200 or newer TVs a Masterlink cable would do the trick.
With non B&O TV, see earler posts.
Sverre