ITUE164@tg says to 電訊台Dark fiber is a basic submarine cable. and there will have different MUX , like DWDM / CWDM Mux. Build on this WDM, there will have Layer 2 technology. Providers can use MPLS or Ethernet technology or some old tech. Over this Layer 2 , Provider and Customer and run IP address. Public or Private.at Tue, Nov 2, 2021 9:26 PM