> “Optical inter-satellite links permit flexible routing of traffic on-orbit. Further, the constellation ensures that frequencies can be reused effectively across different satellites to enhance the flexibility and capacity and robustness of the overall system.”

Is optical communication between satellites an existing technology that's already known to work, or is this new? Also, is this sort of thing done (or expected to be done) by aiming laser exactly at the destination satellite, or is it more of a non-directional blink-a-really-bright-LED sort of thing?