WEBVTT - What is a T1 line and how does it work?

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<v Speaker 1>Welcome to Brainstuff from house Stuff Works dot com where

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<v Speaker 1>smart happens. Hi Am Marshall Brain with today's question. In

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<v Speaker 1>our office, we have a T one line. What is

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<v Speaker 1>a T one line and how does it work? Most

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<v Speaker 1>of us are familiar with a normal business or residential

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<v Speaker 1>line from the cable company, but in many business settings,

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<v Speaker 1>internet connections often come in in the form of something

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<v Speaker 1>called a T one line. The phone company moves nearly

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<v Speaker 1>all voice traffic as digital rather than analog signals. Your

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<v Speaker 1>analog line gets converted to a digital signal by sampling

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<v Speaker 1>it at eight thousand times per second at eight bit

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<v Speaker 1>resolution or sixty four thousand bits per second. Nearly all

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<v Speaker 1>digital data now flows over fiber optic lines, and the

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<v Speaker 1>phone company uses different designations to talk about the capacity

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<v Speaker 1>of all these different fiber optic lines. If your office

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<v Speaker 1>has a T one line, it means that the phone

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<v Speaker 1>company has brought a dedicated copper or fiber optic line

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<v Speaker 1>into your office. A T one line can carry twenty

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<v Speaker 1>four digitized voice channels, or it can carry data at

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<v Speaker 1>a rate of one point five megabits per second. If

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<v Speaker 1>a T one line is being used for telephone conversations,

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<v Speaker 1>it plugs into the office's phone system. If it's carrying data,

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<v Speaker 1>it plugs into the network's router. A T one line

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<v Speaker 1>tends to be extremely reliable. Depending on what they're doing.

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<v Speaker 1>A T one line can generally handle quite a few people.

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<v Speaker 1>For general browsing, dozens or hundreds of users are easily

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<v Speaker 1>able to share a T one line comfortably. Here are

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<v Speaker 1>some of the other common line designations used by the

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<v Speaker 1>phone company. A D S zero line is a normal

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<v Speaker 1>voice channel. It's sixty four kilobits per second, and I

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<v Speaker 1>S D N line is two DS zero lines plus

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<v Speaker 1>some signaling. A T one line is one point five

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<v Speaker 1>megabits per second, a T three line is twenty eight

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<v Speaker 1>t ones or forty three megabits per second, and O

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<v Speaker 1>C three line is a D four t ones or

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<v Speaker 1>one and fifty five megabits per second, and O C

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<v Speaker 1>twelve is four O C threes or six hundred twenty

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<v Speaker 1>two megabits per second, and O C forty eight is

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<v Speaker 1>four O C twelves or two and a half gigabits

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<v Speaker 1>per second, and an O C one nine two is

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<v Speaker 1>four O C forty eight and that's nine point six

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<v Speaker 1>gigabits per second. In other words, and o C one

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<v Speaker 1>two can handle about a hundred and fifty thousands simultaneous

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<v Speaker 1>phone calls or the data for a very large website.

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<v Speaker 1>For more on this and thousands of other topics is

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<v Speaker 1>It has staff works dot com