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

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 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 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.

Hersey, Maine, Nov. 12 /Jeff Johnson/ -- Higher productivity for small to medium sized businesses is just around the corner thanks to commercial grade broadband services that are now being delivered at a fraction of their previous cost. Due to the ever increasing competitive marketplace and a mad dash to consolidate networks, telecoms are offering their premium business services to small businesses for a fraction of what they used to cost just a few years ago. Businesses who use more than four regular phone lines can now upgrade to dynamic integrated T-carrier circuits for the same price.

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.

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.

"When we moved into our new location here in Los Angeles" commented John Baker, a small business owner in San Diego, California, "we feared having to sign up for commercial telephone and internet service. Until about a year ago, the services being offered to us were TDM, which doesn't come cheap. Thankfully our Telarus commercial telecom broker recommended that we give TelePacific a try, and we did. One year later, we've never had an erroneous bill, our phone and data are all on one single dynamic T1, and we can focus on what we do best - brokering mortgages."

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.

"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.

Change does not happen quickly in an industry as so heavily regulated as Telecommunications. Recent industry consolidation has provided huge alternatives to the incumbents, who are now under pressure to keep up with new technologies while charging better prices to retain and attract new customer bases. The only thing that can get in the way of future progress is the law. You know, the one that requires the RBOCs to lease their local loops to CLECs at a reduced rate so that the customer can get a dedicated connection between their office and the CLECs' network. If the FCC decided to lift this requirement, this whole deck of cards could come down in a hurry, and when it does, you can kiss dynamic integrated T1 service for under $500 good bye!

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