This is an example of installation in apartment building. This system enables the users to receive any TV program from each TV-SAT outlet in the apartment. Subscribers of SAT television are able to connect their SAT receivers and receive broadcasts from two satellites (in the case shown - Astra and Hot Bird). The antenna and diplexer are installed on the roof, the set of amplifiers and splitters - in the attic. The system can be further developed, for instance, by CCTV monitoring, as shown here. While building a new house or during renovating or upgrading the old one, the user should remember about cabling every room where TV-SAT outlets are to be installed. It is also a good idea to make a little investment in quality SAT cable to avoid a need of replacement in a few years' time. Due to the complexity of such an installation the design should be entrusted to a professional company. The problem that should be considered is also necessity, on the part of the user, to have 2 SAT receivers capable of controlling DiSEqC multiswitches or the application of a DiSEqC generator e.g. PSAT 122 R85255 - to gain access to the Hot Bird satellite in the case of, for instance, the Cyfra+ users.