Definition 1. - The T1 (or T-1) carrier is the most commonly used digital line in the United States, Canada, and Japan. In these countries, it carries 24 pulse code modulation (PCM) signals using time-division multiplexing (TDM) at an overall rate of 1.544 million bits per second (Mbps). T1 lines use copper wire and span distances within and between major metropolitan areas. A T1 Outstate System has been developed for longer distances between cities.

Definition 2. - The T-carrier system, introduced by the Bell system in the US in the 1960's, was the first successful system that supported digitalised voice transmission. The original transmission rate (1.544 Mbps) in the Lisman T1 line is in common use today in ISP (Internet Service Provider) connections to the Internet

Definition 3. - A type of high speed Internet connection that provides a great deal of bandwidth. Many businesses lease T1 lines to connect to the Internet, but because they are expensive and offer more bandwidth than most small businesses and homes need, they are not realistic solutions for small and low-demand Internet users.

Definition 4. - A high-speed digital connection capable of transmitting data at a rate of approximately 1.5 million bits per second. A T1 line is typically used by small and medium-sized companies with heavy network traffic. It is large enough to send and receive very large text files, graphics, sounds, and databases instantaneously, and is the fastest speed commonly used to connect networks to the Internet. Sometimes referred to as a leased line, a T1 is basically too large and too expensive for individual home use.

Lisman, Alabama, Nov. 06 /David Onaindia/ -- For many small to medium size businesses, higher productivity with relation to their broadband and voice services is just around the corner. Thanks in part to the recent price reduction trend in the industry, carriers have deemed it necessary to consolidate in order to offer more services at a lower cost than their rivals. Overlapping networks have been consolidated into leaner, more feature-rich versions of their previous selves, dramatically lowering the price small businesses pay for the popular dynamic integrated T-carrier (T-1) lines that combine local voice and high-speed Internet service into one connection.

"The real benefit I've seen since upgrading to a dynamic integrated T1 from Nuvox Communications is simplicity" commented Johan Sebastian, a small business owner in Clearwater, Florida. "My phones work great, my internet is fast, and the best part is the reliability; I haven't had a single outage since I signed up for the new service over a year ago. Before when we had DSL and POTS lines, every day was an adventure."

"For years I've played tug-o-war with the phone company who provided voice and data service to my toy manufacturing company" commented Troy Bergfeld of Houston Texas. "They kept trying to sell me services I didn't need, it took them months to finally send me a correct bill, and I wasn't able to recapture bandwidth from my T1 line when nobody was using the phone. Now that has all changed - my Telarus product specialist recommending I give XO Communications a try. Now I use their FLEX T1 product and I pay less and get exactly what I want. I have even add another T1 seamlessly when the time comes for my business to expand."

According to a recent study conducted by PK Communications Telecom Brokers Inc., the average cost of a POTS (plain old telephone service) line serviced by the Bells (AT&T, Verizon, and Qwest) have changed very little over the 10 year span from 1996, the year the Clinton Administration signed into law the Telecommunications Act, to 2006. The real change in the industry came in the T-carrier class of products, where customers can get up to 1.5 Mbps of bandwidth and 24 digital phone lines all in one package. Some CLECs like XO, TelePacific, Nuvox, One Communications, and even Covad are now offering rates well below the $550/month level, making the change seem like a no-brainer to thousands of customers.

"What we're seeing here is the Bells holding their prices steady and milking their high margins on POTS (plain old telephone service) lines for as long as possible. With the lower prices being offered by CLECs (Competitive Local Exchange Carriers) on dynamic integrated T-carrier services, the Bells are scrambling to keep pace before enterprises realize they can actually save money by upgrading to bigger and more reliable circuits." commented Don Rosebush, industry expert.

The two basic Integrated T1 line configurations, as they exist in today's market, are analog and digital. Commonly referred to as "trunks", these 24-channel bundles transmit TDM signals directly to the service provider's network via a local loop. Unlike analog trunks, whose configuration can not change once the channels have been allocated, digital "dynamic" lines can change reconfigure themselves from data, to voice, and back again. This ability to reclaim voice channels for data broadband access when not in use gives the user the performance of two T1's in one.

Expect innovation to continue on its upward spiral as the CLECs continue to expand their footprints as well as their customer bases. Barring any funny stuff from the FCC, the CLECs will be here to stay. Sorry Ma Bell. Recent advances in technology, fostered by competition from growing CLECs, is bringing integrated T1 services to small business everywhere. And the trend doesn't look like it will change anytime soon. CLECs continue to grow their networks, offering more advanced services like metro ethernet, MPLS, and more.

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