Definition 1. - 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 2. - 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 3. - 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 Clarence T1 line is in common use today in ISP (Internet Service Provider) connections to the Internet

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.

Clarence, New York, Jul. 15 /Kiersten Thomas/ -- 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.

Min Lieu owns a small insurance agency in New York. 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 Integrated T1 line has two general flavors; analog and, of course, digital. The term "trunk" is synonymous with an integrated T1 line, representing 24 bundled DS0 (regular 64KB) channels. Digital trunks form the basis technology for dynamic integrated lines, which are capable of transporting digitized versions of voice traffic in addition to regular data packets. This ability of digital trunks to function in the data realm allows it the ability to dynamically allocate traffic according to the application, allowing priority for voice traffic and "re-claiming" that bandwidth for data transfer when the phone call is completed. This ensures that none of the capacity of the T1 line is ever wasted.

"Even though we have been witnessing the re-consolidation of AT&T, we will never go back to the dark ages of telecom where customers were stuck with bad customer service and high prices" commented Troy Karlson, telecom analyst for e-STAR. "The competitive local exchange carriers (CLECs), all whom own their own networks and compete directly with the Bells, have created products such as dynamic T1 service that enables its customers to connect to the Internet at 1.5 MBPS and have up to 24 regular voice lines, packed with a feature-rich suite of add-ons, all for under what it costs to have 6 regular phone lines from Qwest/AT&T/Verizon.

"The marriage of lower price points and feature-rich T-1 services have made it so that customers can now get more bang for less buck" observed Kent Stallions, telecom expert at PK Communications. "The good old days of the Bells charging people $50/month for regular POTs lines without them having another alternative are over. With the advent of sub-$450 dynamic integrated T1 service, businesses are able to get up to 1.5 Mbps of Internet connectivity and 24 phone lines all in one package, for less than what they pay now for 5 regular phone lines" Stallions continued.

With the help of super-CLECs like XO Communications, PAETEC, Nuvox, One Communications, Cavalier Telephone, and TelePacific, small business owners everywhere now have access to non-Bell service that is on par or better than those being offered by the former Bells. Integrated T1s that do more and cost less have transformed into a solid beach head for the newcomers. 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.

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