Definition 1. - 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 Salo T1 line is in common use today in ISP (Internet Service Provider) connections to the Internet

Definition 2. - 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.

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. - 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.

Salo, Minnesota, Oct. 20 /Aaron Bashorun/ -- Small businesses all over the country are discovering a whole new universe of broadband access. As the price of commercial-grade telecommunication services continues to drop, more and more enterprises are starting to drop their plain old telephone service lines in favor of all-digital T1 trunks that deliver voice and data over the same connection. These new enhancements were made possible by the increasing pace of consolidation in the telecommunication industry along with the increasing value bigger phone companies can provide.

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.

"I think the telecom industry in general has turned a corner" opined Jerry Gold of Boston, Massachusetts. "They have finally developed products that are understandable by the industry outsider and, thanks to competition, priced these services in a range that most small businesses can afford. For over 20 years I dreaded dealing with 'the phone company'. But now that I've switched over to One Communications, my integrated T1 is doing everything I need it to, for under $450/month. One actually answers their customer service calls and makes me feel like I'm part of their family. It was a long time coming, but I'm finally able to end the fight with the phone company so I can focus on my sports memorabilia store."

Min Lieu owns a small insurance agency in Minnesota. Five years ago he signed up with XO Communications for a TDM-based integrated T1 line for $870/month, which did not include local or long distance calling. Recently, he was offered XO's version of a dynamic circuit called "XO Flex" for half of the price he was already paying. "I would have been a fool not to take the deal" stated Mr. Lieu. "I'm able to add headcount with additional voice lines, without any increase in expense or degradation in high-speed Internet performance."

At $50 to $75 per month, the average small business telephone customer could expect to pay up to $750 for just 10 regular phone lines, which come with only a standard set of features such as Voicemail, Caller ID, and Three-way calling. From 2000 to 2005, the cost of a dynamic integrated T1 line was well over $800, making it an unattractive option from a pure cost point of view. However, that paradigm has changed with the introduction of sub-$400/month price plans and features that make the old POTs lines look pre-historic.

There are two basic "integrated" DS-1 configurations, analog and digital. The 24-line bundle in which they come is termed a "trunk". The main difference between analog and digital trunks is their flexibility. With digital trunks, voice lines not in use can be dynamically reconfigured to carry data traffic, so they don't sit idle. Analog trunks on the other hand can not change their function once configured by the service provider. Data channels remain data channels and the same for voice channels, even if there is no voice traffic.

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. Looking in the crystal ball of the future, it is clear that new an innovated services being offered by the few super-CLECs remaining will drive innovation higher and prices lower. New technology is being pressed to the forefront by lower prices that the mainstream of small businesses everywhere can comfortably afford.

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