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 Gratton 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.

Gratton, Virginia, Apr. 16 /David Onaindia/ -- The digital universe, and the way people connect to it, is changing. Small businesses, in particular, are discovering new high-speed Internet and telecom options that are now squarely within their budgets. Through a myriad of mergers and acquisitions, telecommunication providers have greatly enhanced their integrated T1 products with features that businesses can't live without, all while dropping the price to about half of what they were just two years ago.

"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.

Integrated T1s comes in two basic configurations: digital and analog trunks, with a trunk being a 24-line (or channel) bundle. The newer, digital trunks, however, are able to run both voice and data over the same channels. By assigning priority to the voice traffic whenever it is present, a dynamic integrated trunk can provide the end-user with a full 1.5 MBPS of data throughput if no phone calls are in progress. As more voice lines are required, less data lines are available. Analog trunks are all pre-assigned to either voice or data traffic, and do not reconfigure in the event there is no voice traffic.

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.

When asked about his recent decision to replace his TDM channelized T1 with a SIP-enabled dynamic T1, Robert Probst, small business owner in San Diego, explained that "it was really an easy decision to make. My business was growing and I couldn't afford the cost of more voice trunks. When I learned that it was possible to have up to 16 voice lines, and a full data T1 of high speed Internet bandwidth, all on the same line, for under $500 - I was sold. I ended up expanding the telecom capability of my business, improving the quality of my Internet connection, and saved money while doing it."

Will this train of innovation, lower prices, and services that add value to SMB's continue to roll down the tracks of progress? It's all up to our government - and which political party controls the FCC. Without the deregulation act of 1996, we would have never known just how much the CLECs were capable of.

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