Digital Subscriber Line new technology that takes advantage of standard coppertelephone line to provide secure, reliable, high-speed Internet access. DSLrefers to the family of digital subscriber line technologies, such as ADSL, HDSL,and RADSL.
Connection speed for DSL ranges from 1.44 Mbps to 512 Kbps downstreamand around 128 Kbps upstream. Unlike traditional connections DSL such as analogmodems and IDSN, DSL deliver continuous “always on” access. That meansmultimedia-rich websites, e-mail, and other online applications are availableanytime. DSL makes it possible for you to remain online even while you’retalking on the telephone-without jeopardizing the quality of either connection.DSL is available in a spectrum of speeds.
Some are best home use, while othersare designed to accommodate rigorous business demands. Whether for business orthe home, DSL, offers unsurpassed price/performance value compared to otheronline options. There are the five facts that one should know about DSL. It isremarkably fast. With DSL service, you can benefit from Internet speeds that areup to 12 minutes faster than a typical ISDN connection and 50 times faster thantraditional 28.
8 Kbps modems. This means that in the 12 seconds it takes to readthis information, you could have downloaded a 2 megabyte presentation file orweb photograph. It would take 10 more minutes (600 more seconds!) to downloadthe same with a traditional 28.8 Kbps.
It’s highly reliable. One can depend onDSL because its proven technology takes full advantage of the existingtelecommunications infrastructure. It’s inherently secure. DSL networkprovides a dedicated Internet connection via private telephone wires, you canbypass dial-up intruders or shared network hackers.
Unlike traditional dial-uppmodems or cable modems. DSL protects your valuable data with the most secureconnection available. It’s surprising affordable. DSL is widely recognized asthe most cost-effective connectivity solution for small buisness. DSL deliversindustrial- strength like speed to multiple users at only 25% of typical TIcosts. There is no better price option available.
DSL is also an exceptionalvalue for home users. At about $2 a day for services that meets the needs ofmost people. The connection is always on. It’s ready to run every minute ofthe day. There’s no more logging on and off. No more busy signals ordisconnects.
This gives you the freedom to focus on what you want to accomplishon line rather than focusing on trying to get connected. In fact, you can bemore productive because the power and immediacy of the internet is continuouslyavailable at your fingerprints. DSL is a network access technology thattelephone companies have been testing and refining since the beginning of thedecade. It has unique advantages that it can provide high speed digitaltransmission over 750 million ordinary phone lines that make up ourcommunication infrastructure.
Speed 384 Kbps 128 Kbps 28.8 Kbps 2 Mb image files72 seconds 3.6 minutes 15.9 minutes 72 MB video 43 minutes 2.
2 hours 9.6 oursDSL enables today’s users to gain continuous access to the Internet orcorporate Local Area Neworks (LANs) at an amazing rate of 25 times to 100 timesfaster than the 56.6 kilobits per seconds modems. DSL modems use sophisticateddigital coding techniques that squeezes up to 99% or more capacity out of anordinary phone line, making a super-fast network access possible. DSl wasoriginally developed to support video on demand services that telephonecompanies planned to offer to compete with cable companies.
However mostcompanies have backed away from these services. Instead, DSL’s high speedcapacity have made it the technology of choice for the majority of the linesleased by large corporation for private voice and data networks. DSL comes inmany different varieties: ADSL Asymmetric or Asynchronous Digital SubscriberLine service transmits faster on direction (1.544 Mbps downstream to the house)than the other (384 Kbps to the the telephonw company’s CO).
ADSL basesservices offer high power Internet users who want to download large files andother resources from the Web in less time than it normally would. SDSL SymmetricDigital Subscriber Line (also know as the single line) provides 144 Kbps ofbandwidth in both directions. SDSL’s is cheaper than other services providedby DSL. It has the ability to transfers information in both directions.
It’sideal for most buisness applications, including internet access, or connectingremote offices of large corporations. IDSL ISDN Digital Subscriber line serviceis designed to accommodate users that already invested in ISDN. This is buisnessoriented service, it provides ISDN signalling at 144 Kbps over a DSL circuit. Itplugs into existing ISDN equipment a local carrier’s CO. HDSL High speedDigital Subscriber Line, it runs approximately 6 Mbps.
This service is used toprovide T-1 digital servies (1.544 Mbps) over standard telephone lines.
