SAVVIS (http://www.savvis.net/corp)

SAVVIS 是美国最大的线路商之一

SAVVIS 经营全世界主要的IP位置，IP,VPN,Voice Services的运输线路以及企业网络问题解决。 The SAVVIS IP network 横跨105个城市，47个国家，包括美国,加拿大, 拉丁美洲, 欧洲地区, 中东地区, 亚洲和大洋洲地区。

SAVVIS Facilities Tour

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Cogent ( http://www.cogentco.com )

Cogent 被誉为世界前五大线路商。

Cogent's 点对点光纤网络由consists of multiple metropolitan IP-over-WDM fiber rings located in Cogent's major markets throughout the United States and Europe. Cogent 目前涵盖北美与欧洲近95%的市场。Cogent 的线路提供各个建筑或资料中心近 5 Gbit/s 的专属频宽。Layer 3 edge routers in each building are connected to Cisco Layer 3 Terabit core routers over two diverse optical paths. These core routers are tied together via an international backbone network consisting of multiple 10 Gbit/s DWDM optical links. With a currently implemented capacity of 80 Gbit/s in the United States and 40 Gbit/s in Europe, Cogent's international IP network is the largest in the world and is scalable to a total capacity of over one Terabit.