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

Leary, Texas, Jun. 08 /Kim Mankaryous/ -- 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 average cost of a business phone line from the Local Bell Operating Company (ILEC) has remained constant for the past ten years" noted Edwin Jones, a senior market analyst and telecom industry expert. "At the same time the prices of T-1 lines have declined from near $1000 per month to a staggering $350. Keeping in mind that a T1 connection is the equivalent of 24 regular phone lines all bundled into one, it comes as no surprise that demand for these services in on the rise."

Min Lieu owns a small insurance agency in Texas. 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."

The old-school integrated T-1 was analog in nature, and came with 24 configurable channels (called a trunk) which could be configured to carry either voice or data traffic. The new "dynamic" trunks are all-digital and can change on-the-fly to carry either data or voice traffic. This comes in handy when none of the voice lines are in use - all channels can revert to carrying data traffic, giving the end-use a full 1.5 MBPS of broadband. Each phone call requires only 64K of bandwidth, so even a small handful of calls only slows down the data connection by a nominal amount.

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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