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The Australia–Japan Cable, or AJC, is a 12,700 km submarine telecommunications cable system linking Australia and Japan via Guam〔(Australia-Japan Cable completes refinancing )〕 that became operational in 2001. It had an original design capacity of 640 Gbit/s, but was initially equipped to utilise 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.〔(Australasian Region ), International Cable Protection Committee.〕 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 utilising 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== #Shima, Japan #Maruyama, Chiba, Japan #Tanguisson, Guam, unincorporated territory of the United States #Tumon Bay, Guam, unincorporated territory of the United States #Oxford Falls, Sydney, Australia #Paddington, Sydney, Australia 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Australia–Japan Cable」の詳細全文を読む スポンサード リンク
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