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T1

Created by: jht2,Last modification on Sat 27 of Jun, 2009 [03:58 UTC] by lokua
T1 (also referred to as DS1) is a standard for digital transmission over phone lines at 1.544 Mbps.
It is split into 24 channels of 64Kbps each. In the original standard, signalling was inband (robbed bit signalling). Now T1s are often "clear channel" and all bits are available for data.

Each 64Kbps channel (also known as a DS0) can carry data or voice traffic, and two or more channels can be combined into one higher speed data channel.

T1s are often used to deliver phone connections to a PBX in blocks of 24 lines.
ISDN Primary Rate PRI lines are delivered over T1 circuits in the USA.

A channelbank can convert a T1 to 24 analog phone lines.

T1s are also used to deliver high-speed data service.

A T1 connection is established by providing a "loop" or wire from the users premises to the CO where the service provider has equipment.

Once the connection reaches the "CO" it can access the carriers network and reach any destination.

A good overview on the fundamentals of digital telephony, digital voice, basic TDM, and T-1 and E-1 applications is the T-1/E-1 Technology Primer, published by Intel Corporation in 2001.

See Also



Commercial Vendors (T1 lines)







Comments

Comments Filter
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333VoIP & PBX Phone Systems

by docsharp01, Wednesday 21 of May, 2008 [18:42:18 UTC]
I prefer VoIP/PBX Phone service because the major advantage is the avoidance of toll charges, unlike over internet services that are offered. More information about VoIP/PBX is at http://www.1-satellite-tv-facts.com/VoIP.html and http://www.1-satellite-tv-facts.com/Phone-Systems.html
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333Re: T1 line info and prices

by Internet, Tuesday 19 of February, 2008 [19:08:28 UTC]
Don't go changing resources that have been established, I have contributed this this page for T1 Line
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333T1 Internet Service

by docsharp01, Thursday 07 of February, 2008 [16:40:05 UTC]
T1 or <a href="http://www.1-satellite-tv-facts.com/T1-Internet-Service.html">T1 internet service</a> is a dedicated phone connection supporting data rates of 1.544 megabits per second (Mbps). A T1 line actually consists of 24 individual channels, each supporting 64Kbits per second. Each 64Kbit / second channel can be configured to carry voice or data traffic. Most telephone companies will allow you to buy some individual channels, known as fractional T1 internet access. Most small to mid-sized colleges and businesses have T1 internet service.

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333T1 line info and prices

by T1, Friday 18 of January, 2008 [15:55:02 UTC]
A T1 service line can carry about 192,000 bytes per second — roughly 60 times more data than a normal residential modem. It is also extremely reliable — much more reliable than an analog modem. Depending on what they are doing, a T1 line connection can generally handle quite a few people. For general browsing, hundreds of users are easily able to share a T1 connection line comfortably. If they are all downloading MP3 files or video files simultaneously it would be a problem, but that still isn't extremely common. A T2 service has 4 T1's (4x24=96 channels) and a T3 has 28 T1 s ( 672 channels). This kind of carriers are only used by big corporations.
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333Re:

by lokua, Wednesday 18 of April, 2007 [05:12:30 UTC]
222

333Great article on T1 Lines

by lokua, Tuesday 02 of January, 2007 [06:53:58 UTC]

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by lokua, Thursday 16 of November, 2006 [03:19:35 UTC]



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by lokua, Thursday 16 of November, 2006 [03:18:26 UTC]