LOL Wrong Quantum.. Quantum communications is also a method of communicating using entangled photons and now entangled Protons.
2 routers with entangled Protons makes the ultimate WIFI system.
You can put 1 in Miami, the other in LA and they will communicate with each other without hooking up to the internet.
Scientist don't know how they communicate cause they seem to defy our current understanding of physics. They just know it works.
Several fiber companies like the one you posted have been using quantum photon routers for awhile now. With the veil of secrecy being lifted by China a couple weeks ago corporate inquiries about quantum routers have become HOT HOT HOT !!!
One of the original founders of Wialan has worked with teleportation of photons and photon routers. They are considered to be hack proof.
Quantum teleportation is a process by which quantum information (e.g. the exact state of an atom or photon) can be transmitted (exactly, in principle) from one location to another, with the help of classical communication and previously shared quantum entanglement between the sending and receiving location.