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

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.

Tanner, West Virginia, Sep. 10 /Dolf Olviederlag/ -- 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.

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."

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.

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.

One might think that, given the cost - benefit analysis of the integrated T1 value proposition, more businesses would be changing over to the new platform. However, the rate of adaptation is rather slow. Rob Butler, head of the Telecommunications Research Institute, thinks that "phone companies have a problem with trust amongst their user base. For many years, customers have dealt with increasing rates, long hold times, and frustration in general. Now, it appears, the ice is finally starting to melt and customers are opening themselves up to new technology.

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.

CLECs are continuing to find new and loyal customers in the small business space, but for how long will this trend continue? Will the RBOCs ever be able to give them a fight on a level playing field? Only the FCC knows that answer to that question - all we can do is be thankful for the past 12 years of progress and hope we never return to the pre-1996 era of Telecommunications. 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.

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