ADOT (Audiophile Digital Optical Technology) uses optical fibre to galvanically isolate the data signal between your router and network streaming devices. All connection options are available from devices with traditional RJ/45 (ethernet) LAN connections and for devices that have a direct SFP Fibre LAN input (such as Melco N5 or S100/2).
 
This clever little (but very important) system converts Copper ethernet (RJ/45) to a optical (fibre) data stream and the difference is far from subtle with a MUCH quiter background giving a much more accurate musical performance. 
The ADOT optical fibre system is available in various options from the starting kit MC01 all the way to the MC04 Plixar PSU. This allows for all types of connections/combinations which are explained below.