If you are looking for a series of reliable Unmanaged Ethernet Switches that can be simply unpacked, connected and used without any additional configuration effort, then you might consider the FL 1000 & 1100 Series from Phoenix Contact
These compact switches, that come with 5, 8 or 16 ports variants, feature an ultra-slim design allowing them to be installed within control cabinets where space is an absolute premium.
All devices are equipped with status LEDs on the front and side of the switches for connection monitoring purposes. This allows users to quickly diagnose an interrupted connection .e.g. as a result of a faulty cable.
Both classic Ethernet communication via copper cabling and long communication paths via fiberglass connections can be achieved using the FL 1000 & 1100 series.