Home > Broadband
1 Hardware
Broadband is a type of transmission method where two or more signals share a medium. This is in contrast to a baseband transmission where one type of signal uses a medium's full bandwidth such as 100BaseT Ethernet. While people profess that narrowband is a description of the amount of bandwidth a medium has, it is still debatable whether the term exists in network engineering circles. The obvious example of a broadband type transmission is ADSL where voice and data share two different parts of the spectrum of a copper wire (voice operates below 3,300 Hz and ADSL starts at 138 kHz in the case of G.dmt ).
2 Modem
A channel may be broadband because even though the signal is modulated on a carrier, it is done in a way to maximise the bandwidth over the channel - examples of this include ADSL (which splits up the signal into parts and sends each part over a separate carrier in order to maximise the usage of the frequency spectrum that the wire can carry).
3 Broadband Internet
Recently, the term Broadband has been hijacked by Internet Service Providers (ISPs) to refer to a particular style of Internet access, called Broadband Internet access, where the connection used for access is greater than a telephone modem (56 kbit/s). It is generally accepted that the term is used to mean a connection of 512 kbit/s (0.5 Mb) or above for the final user, utilizing a broadband modem and the FCC definition of broadband is 200 kbit/s (0.2Mb) in one direction, and advanced broadband is at least 200 kbit/s (0.2 Mb) in both directions, though some Internet Service Providers have marketed services with a shorter bandwidth because there is no specific bitrate defined by the industry. On August 13, 2004 the ISP Wanadoo were told by the Advertising Standards AuthorityThe Advertising Standards Authority (ASA) is a British regulatory body which monitors advertising, ensuring each advert does not breach the Advertising Code, which requires accuracy and decency in advertising. It is a voluntary group with no statutory aut to change the way that they advertised their 512 kbit/s broadband service in BritainThe United Kingdom of Great Britain and Northern Ireland is a state in Western Europe, usually known simply as the United Kingdom the UK Britain or less accurately as Great Britain . The UK was formed by a series of Acts of Union which united the formerly, removing the words "full speed" which rival companies claimed was misleading people into thinking it was the fastest available service. In a similar way, on April 9April 9 is the 99th day of the year in the Gregorian calendar (100th in leap years). There are 266 days remaining. Events 193 Septimius Severus is proclaimed Roman Emperor by the army in Illyricum (in the Balkans). 1241 Battle of Liegnitz: Mongol forces d, 20032003 is a common year starting on Wednesday (link will take you to calendar), and also: The International Year of Freshwater The European Disability Year Summary Perhaps the defining global event of the year 2003 was the Invasion of Iraq launched by the U the Advertising Standards AuthorityThe Advertising Standards Authority (ASA) is a British regulatory body which monitors advertising, ensuring each advert does not breach the Advertising Code, which requires accuracy and decency in advertising. It is a voluntary group with no statutory aut ruled against ISP NTLNTL is a US listed company providing cable services. It is listed on the NYSE, but does the majority of its business in the UK and Ireland, but also has divisions in Europe, Australia and South East Asia. Company Structure The company is called NTL Group, saying that NTL's 128 kbit/s cable modem service must not be marketted as "broadband".
By the above definition, a telephone modem is a broadband connection (because it uses clever tricks to carry 56 kbit/s over a link that has an ultimate bandwidth of 64 kbit/s), and a cable modem is a narrowband connection (because the data is modulated over a carrier signal somewhere between 20 MHz and 500 MHz - the ultimate bandwidth of the coaxial cable is huge), even though the cablemodem connection can be forty times faster (or more) than the POTS modem.
