The video call that happened used no lines, satellites, or any other conventional method. The ocean itself was the line that connected it. With the alliance between the Emperors of the Everhiss clan, Origin technology had become readily available.
The shocking thing was how fast it was for the teams to combine their technology and use Realm and Origin together.
Some devices were placed on the ocean that interacted with the water that was part of the Invoking of the Everhiss clan. The Call of the Dead that Waits Dreaming created a massive creature that commanded the waters similar to Egypt's Nile Technology. And this same water was stretched out in a very thin line that moved across the continents.
This made the line secure as the Presiders would have to find the right point of the water physically.
Managing these lines was the Realm King, who completed their connections.