| 词条 | Australia–Japan Cable |
| 释义 |
| cable_name =Australia–Japan Cable (AJC) | map =AJC-Cable-route.png | owners =Telstra, BT, Verizon Business, Softbank | landing_points =
| technology =Fibre-optic | design_capacity =640 gbit/s (2001) 1000 gbit/s (2008) >4000 gbit/s (2013)[1] | current_capacity =80 gbit/s (2001) 240 gbit/s (2008) 320 gbit/s (2013)[1] | length =12,700 km | topology =collapsed loop design | first_use_date = 2001 }} 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] 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. Landing points
OwnershipAJC is jointly owned by Telstra, BT, Verizon Business and Softbank.[2] See also
References1. ^1 http://www.ajcable.com/ 2. ^1 Australia-Japan Cable completes refinancing {{webarchive |url=https://web.archive.org/web/20091011043514/http://www.itwire.com/content/view/28192/127/ |date=October 11, 2009 }} 3. ^Australasian Region, International Cable Protection Committee. External links
2 : Submarine communications cables in the Pacific Ocean|Australia–Japan relations |
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