Abb Multifunction Gateway.
Its main functions are:
- Floor (OFF OFF ON - address equivalent to the first interior of the building) to identify a floor in a complex with about one hundred units.
- Building (OFF OFF OFF OFF - sequential address, in each building the addresses of the extensions start from 1) to identify a staircase in a large complex.
- Apartment (OFF ON OFF - apartment address, downstream apartment station addresses are irrelevant) to add a door station to an office/apartment.
- Additionalpower supply (OFF ON ON - address irrelevant) to be able to support more devices in a portion of the system.
- Amplifier (ON OFF OFF - address unimportant) to strengthen the video signal and extend distances.
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