• What is a T-1 connection?
• Checking availability in your area
• What is the difference between T1 and 1.5mbit SDSL?

A T-1 is a dedicated phone connection supporting data rates of 1.544Mbits per second. A T-1 line actually consists of 24 individual channels, each of which supports 64Kbits per second. Each 64Kbit/second channel can be configured to carry voice or data traffic. Most telephone companies allow you to buy just some of these individual channels, known as fractional T-1 access.

T-1 lines are a popular leased line option for businesses connecting to the Internet and for Internet Service Providers (ISPs) connecting to the Internet backbone. The Internet backbone itself consists of faster T-3 connections.

T-1 lines are sometimes referred to as DS1 lines.

Note: T-1 comes in either copper or fiber optics.

Source/Reference

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by redxii
last modified: 2002-03-16 23:31:47

To see if T-1 connections are offered in your area, check out the Classified adverts - T1/T3+ service by area map.

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by redxii
last modified: 2002-03-16 23:31:58

A T1 line and an SDSL line uses the same underlying technology - HDSL. The differences between them are not in performance, they are in ease of provisioning and speed of repair.

In the US, lines for T1 data are normally treated as higher importance by telcos, than DSL lines, so time to repair and provisioning can be considerably faster. A T1 fault may be repaired within hours, or a day, whereas a DSL line fault could be a 5 day turn around time.

The other important difference is that T1 lines are more easily repeated to cover longer distances, something that has not yet happened for SDSL lines.

T1 lines are significantly more expensive than DSL lines, a monthly T1 lease, with internet bandwidth, can amount to $1000 or more, compare that with SDSL prices of a few hundred dollars for the same speed.

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by redxii
last modified: 2002-03-16 23:32:13