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 Harman 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. - 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 4. - 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.

Harman, West Virginia, Jul. 14 /Dolf Olviederlag/ -- Is there a resurgence in the popularity of telecommunications providers that compares with the late 1990's? The answer may surprise you. Since the crash of the Internet bubble, struggling telecoms have seen Darwin in action as many companies were forced with the choice of bankruptcy or forced consolidation. However, some companies chose the road less traveled: innovation. By offering customers more for less, many small to medium size business customers are finding that they can upgrade to integrated T1 service for the same cost of five regular phone lines.

Min Lieu owns a small insurance agency in West Virginia. 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."

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.

"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."

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.

Until deregulation allowed smaller, hungrier telecommunications companies the ability to compete, the United States was stuck with technologies that were quickly becoming out of date. Now that the Bells actually have to innovate to keep up with the smaller CLECs, customer everywhere are reaping the benefits. But how much longer will we continue to see improved technology, services, and prices? It's all in the hands of the Federal Communications Commission, as they have the power to sqwash the CLECs by proxy. No wonder AT&T and Verizon are the two biggest lobbying powers in Washington. It makes you wonder what kind of services they would be able to offer had they plowed that money into R&D instead of politics.

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