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Technical Information: T1 Lines
The North American telephone network is built in a modular and
hierachical fashion. At the lowest level you find the retail
package: A single telephone line. When you need a bigger package,
you buy them by the case: 24 telephone lines make a T1
circuit.
T1 circuits are a common way to connect a business customer to the
local telephone company's switch (also known as "the central office").
They are also used between central offices, and the same type of
"fat pipe" circuit can be used for various forms of data communication.
This page will help you understand T1 circuits.
Technical Specifications for T1
For T1 signaling specifications:
ATT Technical Reference 43801
"Digital Channel Banks - Objectives and Requirements" (original D4)
ANSI T1.403 annex C (SF and ESF versions)
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Revision 1.2 2001/01/20 21:10:38 lars
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Revision 1.1 2000/05/28 22:08:13 lars
Added new T1 page.