Data-network switches, wireless networking equipment, gateways, protocol converters, active adapters, network-security appliances and network transceivers. Includes equipment bridging machine data to other systems when connectivity is the acquired function. Passive copper and fibre cables, ducts, data outlets, termination and patching components and passive fibre accessories belong with Electrical & automation equipment. Excludes software-only servers, radio or satellite communication systems, and controllers whose primary purpose is controlling a machine rather than connecting it.