|
Courtesy of ShopforT1.com
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 West Keansburg T1 line is in common use today in ISP (Internet Service Provider) connections to the Internet
Definition 2. -
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 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. -
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.
|
Monday August 18, 2008,
08:22 am ET
West Keansburg, New Jersey, Aug. 18 /Michael 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.
Min Lieu owns a small insurance agency in New Jersey. 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."
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.
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.
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.
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.
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!
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.
|
If you would like to get a real-time 
