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What do T1 and T3 mean?

T1 and T3

ISPs are often connected to the Internet at large via standard cables called (most frequently) T1 or T3 or (very rarely) T1C, T2, or T4. Each of these cables delivers a certain amount of bandwidth at a particular latency. For a quick comparison, a T1 can move 1.544 Mbps and a T1C 3.152. A T2 delivers 6.312 Mbps. A T3 is capable of 44.736 Mbps and the mighty T4 274.760 Mbps. Compare this with a 56K modem which can only handle 0.056 Mbps.

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