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The data passes a substation outside before heading along fibres leading to the city, where it will link to any carriers' network which has bought capacity.
The undersea cable needs power, which will be supplied by Energy Australia. However, in the case of mains failure, generators will take up the slack. This underground parking area will house a 25,000-litre fuel tank to keep them running.
The builders had to put a special rolling door with vents in front of the generator (white box) because it needs 2 cubed metres of air every second. Hot air exits out the back through a newly created hole.