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 Kirby 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.

Kirby, West Virginia, Aug. 12 /Daniel Johannesburg/ -- 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.

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.

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.

Dynamic integrated T1s are a fairly new phenomenon. Unlike their analog counterparts that can never deviate from their initial set up configurations, dynamic T1s are able to convert voice phone calls into data packets and them prioritize their delivery through an all-digital trunk. The ability to break everything down into the lowest common denominator (digital) allows the system to change on-the-fly to reclaim phone lines for high speed Internet the second the phone call is terminated. An integrated T1 essentially provides the end user the same service as one data T1 line and one voice T1 line, for half the cost.

Is the era of the analog trunk, or bundle of 24 DS-0 (64 kbps) channels, officially over? Possibly, thanks to the two-for-the-price-of-one features of a dynamic integrated T1, which can function exactly like a pure 1.5 mbps data T1 when no one is one the phone, and allocate required bandwidth for voice traffic when a user initiates a phone call. Likewise, as soon as the client terminates the voice session, the 64 KB is re-assigned back to the digital universe. This switch-hitting capability provides all of the feel and function of a data T1 and voice T1, for a fraction of the price.

"For years I've played tug-o-war with the phone company who provided voice and data service to my toy manufacturing company" commented Troy Bergfeld of Houston Texas. "They kept trying to sell me services I didn't need, it took them months to finally send me a correct bill, and I wasn't able to recapture bandwidth from my T1 line when nobody was using the phone. Now that has all changed - my Telarus product specialist recommending I give XO Communications a try. Now I use their FLEX T1 product and I pay less and get exactly what I want. I have even add another T1 seamlessly when the time comes for my business to expand."

Once a forgotten segment of the business telecommunication landscape, small to medium size businesses are finally being serviced with products (like the dynamic integrated T1 line) at prices they can afford. Gone are the days when the Bells can shove TDM services down the collective throats of SMB's at prices that resemble a mortgage rather than a telephone service. 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.

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