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From Wikipedia, the free encyclopedia
The Australia–Japan Cable, or AJC, is a 12,700 km submarine telecommunications cable system linking Australia and Japan via Guam[2] that became operational in 2001. It had an original design capacity of 640 Gbit/s, but was initially equipped to use only 80 Gbit/s of this capacity. In April 2008 a capacity upgrade was completed, bringing equipped capacity to 240 Gbit/s. Design capacity was also increased to 1000 Gbit/s. Further upgrades will increase equipped capacity to meet increasing demand.[3]
| Australia–Japan Cable (AJC) | |
|---|---|
| |
| Owners: Telstra, BT, Verizon Business, Softbank | |
Landing points
| |
| Total length | 12,700 km |
| Topology | collapsed loop design |
| Design capacity | 640 gbit/s (2001) 1000 gbit/s (2008) >4000 gbit/s (2013)[1] |
| Currently lit capacity | 80 gbit/s (2001) 240 gbit/s (2008) 320 gbit/s (2013)[1] |
| Technology | Fibre-optic |
| Date of first use | 2001 |
The AJC network employs a collapsed loop design that features diverse landings in Australia, Guam and Japan and diverse routing at water depths less than 4000m. This design reduces cost by using a common sheath in deep water, where risk of failure is low, but provides redundancy to mitigate risk in shallower waters and in the landing stations.
The network supports a range of access interfaces, including SDH at STM1, STM4, STM16 and STM64 levels, 2.5G clear, Direct Wavelength Access, Gigabit Ethernet and 10 Gigabit Ethernet. A range of protection options are available, including SDH span and ring protection and 1:n wavelength redundancy.
The cable has a design life to 2026.
AJC is jointly owned by Telstra, BT, Verizon Business and Softbank.[2]
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