Cable Modems Vs. Digital Subscriber :: essays research papers fc

The Internet has grabbed on to the human race and it isntletting go. Nearly 36 million U.S. homes currently eat PCsand e rattlingone is dying to jump on the informationsuper full(prenominal)way. The Internet, which started as a assemblage ofgovernment agencies and universities, has grown to includealmost anyone, from home droprs to large companies and allone in between. It makes sense then that providingInternet service is big business. The service which apply tobe dominated by groups of nerdy computer whizzes usingequipment in somebodys basement is now being provided bymany prognosticate companies, large on-line services and maysoon be useable from you local cable company.Computer users are an impatient group. They are esurient for a faster way of connecting to the net. Untilnow home users have had to place upright with the slow connectionsavailable with elongate modems or spend a comparatively largeamount on having a digital line, such(prenominal) as ISDN, installed andth en continue paying a lot for the monthly chargesassociated with such lines. measuring analog modems have always been hindered by thebandwidth they are allowed to use. Standard voice gradephone lines use the frequency spectrum between 0khz and 4khzto glow their signal. 33.6 kbps modems packed nearly 11bits of data per hertz, a remarkable feat, which is verynear the theoretical limit. To allow faster connectionsmodems must use a wider bandwidth. Two new competing technologies are now beingdevelopedwhich use this broadband idea to give computer users thespeed they crave. Telephone companies are working ondeveloping a way to use the ensample twisted pair copperwires that now connect nearly every home in America totransmit data at high speeds. These technologies,collectively called DSL, come in cardinal briny flavors. ADSL,this is an acronym for asymmetric digital subscriber line,is the most common. This name was coined by Bellcore in1989. The other main type of digital subscriber lin e iscalled HDSL. It stands for high-bit-rate digital subscriberline. These two technologies are essentially the same,except they apportion a different bandwidth to upriver(user to network) and downstream (network to user) datatransmission.Concurrently, cable television providers are working ontechnologies to allow them to connect computers to theirnetwork and allow users to connect to the Internet at speedsjust as high. Such equipment is being called a cable modem. phone line modems offer the possibility of transferring dataat rates up to decennary megabits per second, a speed nearly tentimes faster than that of ISDN and well-nigh twenty times fasterthan todays fastest analog modems. This number is somewhatmisleading however. The truth is that in order to in reality