Sydney is the most popular area for submarine cables landing in Australia and the most interconnected data centres in Australia.
According to the Telecommunications and Other Legislation Amendment (Protection of Submarine Cables and Other Measures) Act (the lattest version 2014), the Australian Communications and Media Authority (ACMA) has declared two submarine cable protection zones in Sydney:
- The Northern Sydney Protection Zone extends 40 nautical miles (74km) offshore from Narrabeen beach and to the depth of 2000 metres. It includes the northern branches of the Australia Japan Cable and the Southern Cross cable, extends 1 nautical mile either side of each cable, and the area between the 2 cables.
- The Southern Sydney Protection Zone extends 30 nautical miles (55km) offshore from Tamarama and Clovelly beaches, and to the depth of 2000 metres. It includes the southern branches of the Australia Japan Cable and the Southern Cross Cable, extends 1 nautical mile either side of each cable and includes the area between the 2 cables.
There are now five cable landing stations in Sydney and two carrier neutral data centers serving as submarine cable landing stations, including:
- Telstra Oxford Falls Cable Landing Station, for AJC, TGA, and APNG-2
- SCCL Brookvale Cable Landing Station, for Gondwana-1, Southern Cross Cable Network and JGA South
- TPG/Pipe Networks Cromer Cable Landing Station, for PPC-1
- NEXTDC S1, for Indigo Central (housing Superloop's terminal equipment)
- Optus Alexandria Cable Landing Station, for Southern Cross Cable Network, Southern Cross NEXT and Indigo Central.
- Telstra Paddington Cable Landing Station, for AJC, Telstra Endeavour and Coral Sea Cable System (CS²)
- Equinix SY4, for Hawaiki Cable and JGA South.