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AT&T Network Information
To
meet the demanding needs of your business and to help hone your competitive
edge, a world-class IP provider must demonstrate key criteria: a robust
infrastructure, advanced technology, extraordinary capacity and reach,
dependable and multi-tiered security, support for a rich array of applications
and services, guaranteed service levels, a global presence and the ability to
supply services not just to its own customer base but to other providers.
The highly reliable AT&T IP Backbone allows AT&T to take a position as a Tier
1, world-class provider of IP services, meeting all of the criteria listed
above. 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; AT&T was the first ISP with a fully operational, coast-to-coast
OC-192 IP Backbone; AT&T was first ISP to establish a cross-country OC-48
link and the first to carry live customer traffic via an OC-192 link
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
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
PeerMon, a real-time monitoring tool that detects possible changes or
modifications to the routes of AT&T’s routes as advertised by peers in order
to enhance routing stability
Consistently low latency, supported by Service Level Agreements (SLAs) 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
