Stackable communications system

A stackable communications system comprises a plurality of modules. Each module comprises a power controller, a power switch, induction interconnections to connect to other modules, wherein the interconnections are via close proximity inductively coupled Ethernet connections, and components to perform a particular function or group of functions. Each module connects to at least one other module via the interconnections, and each module communicates with at least one other module in the plurality of modules. A product comprises a first part of a separable coupling transformer. The first part is configured to inductively couple to a second part of the separable coupling transformer when placed within an inductive range of the second part, and to establish a wireless Ethernet communications link when placed within the inductive range of the second part. The invention further comprises a use and a method.