Leased lines (T1, T2, T3)

December 2016

Leased lines

"Leased" lines enable transmission of data at medium and high speeds (64 Kbps to 140 Mbps) by point to point or multipoint connection (Transfix service).

In Europe, there are five types of lines distinguished according to their speed:

  • E0 (64Kbps)
  • ,
  • E1 = 32 E0 lines (2Mbps)
  • ,
  • E1 = 128 E0 lines (8Mbps)
  • ,
  • E3 = 16 E1 lines (34Mbps)
  • ,
  • E4 = 64 E1 lines (140Mbps)

In the United States, the concept is as follows:

  • T1 (1.544 Mbps)
  • T2 = 4 T1 lines (6 Mbps)
  • ,
  • T3 = 28 T1 lines (45 Mbps)
  • ,
  • T4 = 168 T1 lines (275 Mbps)

Why do you need a leased line?

As a general rule, to get an Internet connection, you must pay a subscription to an Internet Service Provider or online service. The cost of this connection depends on the data transfer speed.


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