Introduction to Voice and Data T1

Basically, T1 is a leased line used in telecommunications. By "leased", it is meant that the company using the T1 line is paying to rent the line, in essence reserving it for their own bandwidth needs. This allows the user to maintain a single open circuit at all times, as opposed to traditional telephone services that use the same line for several connections through a process referred to as "switching."

The T1 line uses reserved circuits which operate over copper or fiber-optic cables. These leased lines guarantee the user necessary bandwidth for network traffic, making them ideal for businesses which may rely on these needs. T1 lines are also commonly used by businesses and other organizations to connect geographically separated locations for private voice and data networking, and are typically rented at a monthly or yearly rate.

AT&T first introduced T1 technology in the early 1960's, but it was not until the early 1990's that the market for T1 service became competitive enough to allow the service to become affordable for normal consumer and business use. Many top companies, such as IBM, and even the United States Government have been using T1 for quite some time, due to its reliability and performance.

How do T1 lines work?

T1 service is typically provided over a network of copper or fiber-optic cables. Every complete T1 line consists of 24 channels that transmit data, independently, at 64Kbps. These complete T1 lines are referred to as "full T1," and provide a total of 1.54 Mbps of data synchronously (both incoming and outgoing).

If used for telephone lines, one full line will provide 24 separate phone lines. This is useful for businesses or call centers which receive many telephone calls, as one full T1 line is much more cost-effective than paying for 24 separate phone lines.

It is also possible to lease a portion of T1 line, called "fractional T1". These lines offer a lower data transfer rate at lower cost, and are commonly used in hotels, apartment buildings, etc. to provide Internet access to residential customers. Since each T1 line contains 24 channels, it is possible to purchase any number of these channels. For example, 12 channels will provide you with a 768Kbps connection (12 channels x 64 Kbps).

The separate channels can also be allocated to provide separate services. For example, a full T1 line can be used to provide 12 separate phone lines, as well as 768Kbps of bandwidth.

Mr. Oliver is a marketing agent of Cavalier Sales Agent. The telecommunications company provides phone, internet, and digital television services throughout the Mid Atlantic region. For more information on their Telecommunications Services please visit their website.