Level 3 The Level(3) digital fiber-optic network is one of the most extensive and complex data distribution grids in the world.

Engineered for stability and efficiency, Level(3)'s bandwidth architecture spreads over 20,000 miles throughout the U.S. and Europe. Multi-conduit construction allows the network to be constantly upgraded with the latest technologies, ensuring that the services you receive are always the best available.

Peering with other Tier-1 providers means that the transmission of data to the end user takes the shortest route, providing the fastest and most stable connection possible.

AboveNet The AboveNet backbone has been optimized for scalability, survivability, performance, efficiency and manageability. The current AboveNet network consists of a set of sites interconnected in a partial mesh and will be extended to accommodate a larger number of sites moving toward a two level hierarchy. This two level approach allows arbitrary scaling at either level according to various technological and business imperatives.

AboveNet hubs are connected via AboveNet fiber and DWDM equipment terminating the fiber. This infrastructure enables AboveNet to deliver a high level of availability and fast Internet response for both domestic and international traffic.

Cogent Cogent's end-to-end optical network consists of multiple metropolitan IP-over-WDM fiber rings located in Cogent's major markets throughout the United States and Europe. Cogent currently has a presence in over 86 markets throughout the United States and Europe.

With a currently implemented capacity of 80 Gbit/s in the United States and 40 Gbit/s in Europe, Cogent's multi-national IP network is the largest in the world and is scalable to a total capacity of over one Terabit.

PCCW With a presence throughout Asia, the Americas, Europe and the Middle East, PCCW Global provides integrated global communications solutions on an IP-enabled Next Generation Network to address the worldwide needs of business enterprises and service providers.

SAVVIS SAVVIS operates an integrated global IP and transport network that delivers IP VPN, Voice Services, and Internet solutions for enterprises and carriers alike. The SAVVIS IP network spans 105 cities in 47 countries, encompassing the U.S., Canada, Latin America, Europe, The Middle East, Asia and the Pacific Rim.