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Tier 1 carrier
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A Tier 1 carrier is a telco or ISP that is at the top of the telecommunications peering and settlements food chain.
Although there is no formal definition, the following generally holds
- Tier 1 operators typically have operations in more than one country
- Tier 1 operators own and operate their own physical networks, and either own or part-own their international submarine cable links.
- Tier 1 operators have revenue-neutral peering agreements with other Tier 1 operators, and generally do not pay for transit.
List of Tier 1 carriers:
- British Telecom (BT)
- Cable and Wireless[?]
- Global Crossing
- Level 3[?]
- Sprint[?]
- Williams Communications[?]
- WorldCom
- etc.
See also: peering points
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