The powerfully built, flexible NTT/VERIO Global Tier One Network uses the best, most up-to-date technologies to provide fast, efficient and accurate data transport. With more direct paths, routing options, and private peering points, VERIO speeds data to its destination with fewer hops, less packet loss and fewer delays. You get guaranteed high performance, plus 24/7/365 network monitoring by our state-of-the-art Network Operations Center (NOC)-all backed by the strength of a trusted and stable industry leader. The network features OC3, OC12 and OC48 circuits as well as Cisco and Juniper Networks router technology.

At Global Crossing you get the value, strength and security of a seamless Tier-1 global IP network, and experience the advantages of a network that runs with a single AS (Autonomous System) number for virtually flawless data transport -- fewer data handoffs means better transmission, less down-time, and greater gaming for you.

The Allegiance NexGen One network provides enhanced network services and extended capabilities while maintaining the highest levels of reliability and uninterrupted service. The fully diverse MPLS enabled network offers increased capacity and peering points, improved switching times with faster rerouting, and reduced latency.

Level 3 has built an advanced fiber-optic network utilizing Internet Protocol (IP) based technology. The Level 3 network combines both local and long distance networks connecting customers end-to-end. The company has 92 markets in service; 72 in the U.S. and 20 in Europe.

Sprint offers the nation's only coast-to-coast, four-fiber, bi-directional SONET network that ensures reliable network connectivity. Outside of the U.S., our SDH-based international backbone connects you to the Sprint SONET rings. So, no matter where you are, if a fiber cut occurs, traffic will be redirected instantly, ensuring virtually uninterrupted service. The Sprint OC-192 backbone can connect your locations in North America, South America, Europe, and the Asia-Pacific regions. Self-healing SONET ring technology makes the Sprint network one of the most survivable in the world. The Sprint Global Tier-1 IP backbone is designed to run at no more than 50% utilization to ensure congestion-free operation and virtually no delay or packet loss.

MCI owns the world's farthest reaching global network (based on company owned PoPs), and spans more than 4,500 Points of Presence (POPs) throughout the world, with 3.2 million global dial modems and high-capacity connections to more than 96,000 lit buildings. The global IP network can circle the globe more than four times. Additionally, MCI remains the most connected Internet backbone provider with the greatest number of Autonomous System network connections. The company's expansive IP footprint, coupled with its direct interconnections, exceeds all other competitor networks and enables its business customers and ISPs to reach more destinations directly through MCI's global IP backbone than any other carrier.

Time Warner Telecom's IP backbone architecture consists of multiple, diverse optical circuits with a core network operating at OC-48 speeds and some peripheral locations connected via OC-12s. Time Warner Telecom's IP backbone is built with redundancy at the local, regional, and national levels. Time Warner Telecom metropolitan SONET and DWDM infrastructures (composed of fiber, equipment and on-net facilities) are configured to enable redundant local transport from customer locations to TWTC local Internet points of presence (POPs). These local Internet POPs are connected via diversely routed Packet-over-SONET circuits to enable regional connectivity. The regional connectivity is interconnected through MPLS to other regions’ IP POPs to form the Time Warner Telecom national IP backbone. Additional local/regional circuits are dedicated for private and public peering arrangements for redundant IP traffic management. The backbone is designed to promote availability, survivability, and diversity in order to provide high quality services to TWTC customers. TWTC's network systems are specifically designed to automatically trigger processes to increase capacity when the IP backbone reaches 60% sustained utilization.

AboveNet’s metro network connects to New York, Washington D.C., Seattle, Chicago, Dallas, San Francisco, Los Angeles, Boston, Houston, Atlanta, Baltimore, and Philadelphia. The network includes 6 data centers throughout the US including San Jose, New York, Northern Virginia and Seattle. IP Transit Services from AboveNet overcome bandwidth limitations by giving customers a direct path to the Internet from all major metro areas over AboveNet’s 100 percent fiber-optic network.

Broadwing Communications, LLC, provides innovative telecommunications solutions to enterprises, carriers and government entities. Broadwing's one-of-a-kind, nationwide, all-optical network enables the delivery of data, voice, video and high-capacity bandwidth services with unparalleled customer focus and speed. Broadwing's unique architecture keeps regional traffic regional with one-hop routing between regions, assuring low latency and efficient traffic delivery for mission-critical data. Broadwing features robust peering with more than 200 peering relationships with other providers in multiple, geographically dispersed locations. Finally, a dual vendor architecture protects against vendor-specific software or hardware failure by using both Cisco and Juniper hardware.

The highly reliable AT&T IP Backbone allows AT&T to take a position as a Tier 1, world-class provider of IP services. Some of the many features of the AT&T IP infrastructure – all owned and controlled by AT&T – include: Multiple, high-speed OC-48 (2.5 Gbps) and OC-192 (10 Gbps) interoffice trunk facilities; A highly reliable core network, consisting of more than 53,000 miles of fiber optic cable and more than 80 self-healing SONET rings – more than any other carrier in the industry - An additional 16,500 miles of next-generation (OC-192 and OC-768-capable) fiber are currently being deployed; Default-free routing, in which packets flow directly from the AT&T IP Backbone to other ISP networks via peering or customer connections – the most direct route possible; Consistently low latency, supported by Service Level Agreements of 60 milliseconds for a network-wide average roundtrip between city pairs in the US and 120 milliseconds for the average round-trip delay of the fastest link between New York and London and between Washington, DC and Amsterdam; Low packet loss, with a network-wide average of no more than 0.7%; Multi-layered security architecture and physical security for all backbone nodes; Support for Virtual Private Networks, intranets and extranets, web hosting, IP-enabled fax, IP-EDI, managed security services and much more; Multiple access choices, including dial, private line, ATM, frame relay, cable modem and DSL (Digital Subscriber Line); Global reach through points-of-presence in 850 cities in more than 50 countries.