The Powerline 2000 combination you require depends on the number of Swisscom TV-Boxes you want to connect:
1 TV-Box: One Powerline Connection Kit 2000 (2 adapters)
2 TV-Boxes: One Powerline Connection Kit 2000 and one Powerline 2000 Connection adapter (3 adapters)
3 TV-Boxes: One Powerline Connection Kit 2000 and two Powerline 2000 Connection adapters (4 adapters)