In contrast to stand-alone multiswitches,
a cascadable system can be extended to become a solution covering a very large number of end-users/ satellite receivers. If your building layout means
that users live on different floors inevitably causing very different cable lengths from the multiswitch to the end-user apartment, a cascadable multiswitch installation is the best solution.

Cascadable means that every multiswitch has its standard input from the LNBs, but furthermore has outputs, where the LNB signal can be conveyed further down the building floors to more multiswitches.

Most cascade multiswitches use a DC an external switch mode power supply. Depending on the size of the system you may only need a single power supply connected to one of the cascade multiswitches.
It will automatically feed other switches and even the LNBs via the distributiontrunk lines. This allows you to install the power supply where mains voltage is available.