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 Shiloh 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. - 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.

Shiloh, Louisiana, Aug. 28 /Olamide Lieberman/ -- 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.

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.

Prior to the advent of the "all digital" integrated T-1 in 2005, customers only had one choice when it came to dedicated service: analog trunks (24 line bundles). Not only where analog trunks expensive - the average cost ranging from $800 to $1500 per month depending on the user's geographic proximity to the LECs point of presence - they could not re-allocate unused voice channels to carry data. Digital trunks, on the other hand, can reclaim voice lines not in use and put them to work carrying high-speed data packets. That means users enjoy the full 1.5 Mbps of broadband when they are not on the phone.

The question remains, if this new technology is so progressive, why did it take over five years to gain broad appeal to SMB's across the country? One industry analyst from the Telecommunications Research Institute observed that many customers who consume commercial-grade phone service became very untrusting of telecom providers after the Internet bubble burst in 2000 and the MCI bankruptcy proceedings full of allegations of fraud and embezzlement. After all, no customer wants to come to work one day just to find out that their connection to the outside world has been shut down due to financially unstable service providers not being able to run a profitable or ethical business. Now, due to a series of acquisitions and mergers, the "survivors" are offering great products at rates that SMB's can't continue to ignore. The CLEC's and Bells are quickly gaining traction with the very important demographic.

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."

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.

Evolution has lead to a better, cheaper alternative to TDM services that the Bells were peddling for decades in a vacuum of competition. Now the industry, lead by the innovation and great business practices of the CLECs, seems to have turned a corner - leaving the incumbents playing catchup. Obviously, the main benefactor of all of this competition is the small to medium size business - a segment of the market that was taken for granted until today. Hopefully the CLECs can continue to push the boundaries of innovation and economics. The only thing that can keep them from the promise land is the gatekeeper of competition: the Federal Communications Commission, and the huge Bells (AT&T and Verizon - that's you) who make it a point to spend more money lobbying in Washington DC than Exxon Mobile.

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