What is Broadband?

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In the recent past, broadband is a common term in the field of communication and used in different contexts. Broadband internet is among the most recent and common references. It is used to refer to the provision of high-speed internet services using cable or DSL services. The connection is made using a broadband router that routes data packets to and from the internet or local area connection. It uses an interface that supports DSL broadband technologies.

History Of The Broadband
Use of broadband may date back to 1980 when Integrated Service Digital Network (ISDN) was devised. This used either basic rate access with 64 Kbps or Primary Rate Access with 1.544 Mbps or 2.048 Mbps. Broadband was the term used at the time to define ISDN services that were above the primary rates.

Broadband service is standard in most homes around the Western Europe and the US. Used to access the internet, the service is accessed through use of a broadband router or modem. But what is the technology behind broadband? A digital subscriber line and Asynchronous Digital Subscriber Line (ADSL) is the common provider of broadband internet services.

How The Broadband Works
Build on the platform of the traditional telephone cables; ADSL has the ability to support both uplink and downlink high-speed modems. Of importance to note is the fact that the uplink modem is much slower compared to the downlink. This owes to the fact that we request for more information from the internet compared to what we post. Alongside the internet services, broadband is also used to maintain the traditional telephony services.

In the year 1998, was when the first high-speed ADSL was introduced. This had the capacity to offer signals of 8 Mbps downstream and 1 Mbps downstream. With continued internet growth and the need for higher speed, improvement of these standards continued over the years leading to the introduction of ADSL2 in 2002. This came with increased downstream rates of 12 Mbps. ADSL2+ followed in 2003 with downstream rates of up to 24 Mbps.

To achieve these fast date rates, ADSL2 and ADSL2+ use Discrete Multi-Tone (DMT) modulation. This is a form of Frequency Division Multiplex (FDM) which splits bandwidth into sub channels each with its sub-carrier. The sub-carriers use a form of Phase Shift Keyed Modulation. ADSL uses 256 of the sub-channels each with a subcarrier whose upper range is approximately 1.1 Mhz. ADSL2+ uses a wide frequency range to double the speed using 512 sub-channels and an upper limit of 2.2 MHz.

Common broadband service in most of the developed countries is up to 24 Mbps. In order to enjoy the faster internet and other services offered through broadband connectivity, it is important to upgrade to a device that supports this technology. Broadband devices produced before the introduction of these standards stands very little chances in supporting these faster capabilities. Consider seeking assistance from your currents broadband router manufacturer if your service provider does not provide the device in place.

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