What’s The Difference Between Tier-1-Tier-2-And Tier-3 Bandwidth Providers To Your Business?

“Tiers” within the telecom international has a tendency to have a couple of definitions, relying on who you ask. What tier a bandwidth service is, is loosely outlined at highest and everybody has their very own opinion of what tier a service could be. Here is my opinion:

Tier-1: [may be considered an RBOC or LEC – Regional Bell Operating Company or Local Exchange Carrier]

Tier-1 is a community wherein most effective agreement unfastened friends and consumers are serviced. The community operator can pay for none of it is transit.

Tier-1 is the optimal community spine for medium to huge companies with important reliability, steadiness, and scalability necessities.

Tier-1 may also be a bonus relating to dealing with DDoS assaults: in the event you ask/configure your Tier-1 supplier to null-route an IP they are going to enforce the null-route at their borders, so there’s no level of saturation.

Examples of US Tier 1 carriers:


AT&T (previously SBC, Bell South, Southwestern Bell, Ameritech)


Verizon (previously MCI and UUNET)

Global Crossing

Level 3 (just lately merged with Broadwing)

NTT Communications

Tier-2: [may be considered a CLEC (Competitive Local Exchange Carrier); has their own network, but also resells tier 1]

Tier-2 is the place the community operator buys all or a few of it is transit from a Tier-1 and resells it.

Tier-2 may also be a bonus if you wish to have any individual to supply high quality bandwidth, and particularly in case your want is a unmarried set up location. If you purchase from Tier-1 #1 in New York, and #1 has an issue with its Tier-1 #2 peering router in New York, then all of your site visitors from you to #2 is also affected. Your talent to shout at #1 and get them to mend it’ll be restricted, particularly if the issue is with #2’s border router. A just right Tier-2 will track its upstreams and their peering issues for bother, and take measures to make sure that it does not have an effect on their consumers. Even if you wish to have multi-location installs, purchasing from a just right Tier-2 may also be helpful.

A Tier-2 that most effective responds to critical issues (e.g. general outage of an upstream hyperlink) is not more helpful than a Tier-1 to any individual who has multi-locations.

Pricing from Tier-2 ISPs is continuously inexpensive on the low-end (e.g. T1). Tier-2’s will continuously beat the tier-1’s in pricing “get right of entry to products and services”. But if you are going to buy within the masses of megabits, a Tier-2 is prone to quote a lot upper than a Tier-1.

Tier-2’s are typically smaller firms, and are higher ready to “make offers”, or acknowledge bundling of contracts, write customized SLAs (Service Level Agreements), trench fiber on your location in trade for that signed contract, and so forth. Unless you purchase a couple of gigabits out of your upstreams, if you wish to package deal contracts with Tier-1s, you’re going to almost certainly end-up doing it via a wholesaler or different purchasing mechanism.

Examples of US Tier-2 carriers:

XO Communications


Paetec/US LEC

Time Warner Telecom (just lately merged with Xpedius)

Eschelon Telecom Inc

Cogent Communications




AOL Transit Data Network


IDT Corp.

Tier 3: [wholesalers /resellers of tier 1 and 2 networks]

Tier-Three are downstream consumers of Tier-2’s. Tier-Three might come up with what looks as if a just right worth…..however longterm reliability, efficiency, and scalability will most probably undergo. For piece of thoughts for what you are promoting a Tier-1 or Tier-2 are higher alternatives is nearly each and every case. However, PowerNet Global is a huge exception to this rule because of their forged infrastructure and relationships with main gamers.

Examples of US Tier-Three carriers:



Primus Telecom

PowerNet Global

Access One Inc.

Splice Communications


Whatever industry software you wish to have met remember to believe what tier your to be had bandwidth suppliers are to your buying choice. Ignoring this issue to your deliberations might lead to not up to optimal implementation and pride in spite of everything. Make a sensible industry choice…..depart not anything to likelihood.