2011年7月17日星期日

海底光缆地图 zz

非洲的一位软件开发者Greg Mahlknecht花了几个月时间制作了一幅基于Google Maps海底光缆地图，包括长度、带宽、链路等信息。例如，连接中国山东的一条跨太平洋高速光缆（Trans-Pacific Express），带宽为5.12Tbps，总长度为1.77万千米；另一条带宽2.5Tbps。从地图上看，连接中国的海底光缆密度远不如临近的香港、台湾、韩国和日本。有意思的是，这幅地图和1901年的海底电报电话线地图，以及15世纪到19世纪的全球海上贸易地图惊人的相似。

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// 发贴者：放牛娃的春天 @ 七月 17, 2011 0 条评论

汕头登陆的国际海缆

 

亚欧三号：

SEA-ME-WE 3

SEA-ME-WE 3 or South-East Asia - Middle East - Western Europe 3 is an optical submarine telecommunications cable linking those regions and is the longest in the world, completed in late 2000. It is operated by India's Tata Communications and 92 other investors from the telecom industry. It was commissioned in March 2000.

It is 39,000 kilometres (24,000 mi) in length and uses Wavelength Division Multiplexing (WDM) technology with Synchronous Digital Hierarchy (SDH) transmission to increase capacity and enhance the quality of the signal, especially over long distances (this cable stretches from North Germany to Australia and Japan).

According to the cable system network administrator's website, the system capacity has been upgraded several times. The cable system itself has two fibre pairs, each carrying (as of May 2007) 48 wavelengths of 10 Gbit/s。

 

中美海缆：

CUCN or China-US Cable Network is a submarine telecommunications cable linking several countries in the Asia-Pacific region.

China-US-CN-route.png

It has landing points in:

  1. Shantou, Guangdong Province, China
  2. Fangshan, Pingtung County, Taiwan Province, Taiwan
  3. Chongming, Shanghai, China
  4. Okinawa Prefecture, Japan
  5. Pusan, South Korea
  6. Chikura, Chiba Prefecture, Japan
  7. Tanguisson Point, Tamuning Village, Guam
  8. Bandon, Coos County, Oregon, USA
  9. San Luis Obispo, San Luis Obispo County, California, USA

 

亚太二号：

APCN or Asia-Pacific Cable Network is a submarine telecommunications cable system linking nine Asian countries.

It has landing points in:

It has a transmission capacity of 5 Gbit/s, and a total cable length of approximately 12,000 km. It started operation on 1997.

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// 发贴者：放牛娃的春天 @ 七月 17, 2011 0 条评论

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