Tier 1 network

(redirected from T1 network)

Tier 1 network

A top-level network on the Internet. There are about a dozen Tier 1 networks, most of which are in the U.S., including AT&T, Global Crossing, Level 3, Qwest, Sprint and Verizon (originally UUNET). Known as "settlement-free peering," Tier 1 networks are private networks that allow traffic from other Tier 1 networks to transit their backbones without a fee. See peering and IXP.

Tier 2 and Tier 3 Networks
Tier 2 networks peer with some networks without fees but pay to reach a large portion of the Internet. Tier 3 networks always pay fees to obtain access to the larger backbones.

ARPAnet to NSFnet to Tier 1
ARPAnet was the original Internet backbone, which was superseded by the National Science Foundation Network (NSFnet) in the late 1980s. NSFnet was replaced by Tier 1 networks in the mid-1990s when the Internet became a commercial venture. See ARPAnet, NSFnet and Internet.
References in periodicals archive ?
Optivision's interoperable, network-attached, streaming video components support both LAN and WAN industry standards, including IP/Ethernet, ATM, Gigabit Ethernet, and T1 network interface, offering a broad range of high-quality streaming video applications and ease-of-implementation in a variety of network environments.
The information moves automatically over the district's high-speed T1 network to the central database on a daily basis.
The Access Bank II includes two T1 network interfaces with fully integrated CSU and Data Service Units (DSU), offering up to 3 Mbps of total throughput.
The SPW system is capable of providing power for 28 T1 network interface units with performance monitoring (NIU-PMs), while providing transient protection and overvoltage protection for the upstream multiplexer (MUX).
The most popular models provide a single data connection and a single T1 network connection.
It features the same plug-and-play functionality as Westell's widely used and field-proven SmartJack[TM] T1 network interface unit (NIU) service demarcation device.
We are adding a scheduling system for statewide resources and connecting the T1 network into other private networks.
Nexaira's BCII router is establishing itself as a leader in 3G/4G data card support, ensuring compatibility and service from the leading cellular carriers and/or DSL, cable or T1 network providers.
But since the T1 network cuts our call costs to less than half what we pay using the public switched network, it is important that each network site be carefully configured.
The FLASHWAVE 4100 ES platform includes an integrated T1 Network Interface Unit (NIU) and Ethernet Network Interface Device (NID) to eliminate multiple external devices.
Twenty to 50 megabyte files of circuit board designs and product blueprints had to be routinely transported across the T1 network among campuses in Chippewa Falls.
The high-speed Omnimux T1 network maximizes IS network resources by transporting voice and all corporate data as well as two-way radio and protective relay.