The Cable Modem Revolution Essay Research Paper — страница 2

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will require the cable companies to plan very carefully and to gain an enormous understanding of TCP/IP networking. They ll have to set up routers and servers at the distribution points and at strategic places around the cable system to manage Internet traffic. Many user concerns must also be considered. For instance, if your home or office isn t yet wired for cable TV, or if your cable operator isn t planning to offer Internet access, you can t do much to change that except move. Another location issue concerns your home appliances. What if your PC isn t near your TV of existing cable drops? The cable company will need to rewire your house and snake the cable to your computer room. Yet another concern is standardization. For one thing, cable modems are still fairly new; many

have only recently begun shipping. Each modem manufacturer uses a different data-transmission specification, so cable modems from different vendors are incompatible. Therefore, if you move to another city, you ll need a cable modem from the local cable operator. Telephone companies aren t just sitting around as the cable Internet access technology prepares to past them up. Many Telephone companies are actively investigating their own weapon. This weapon is ADSL (asymmetrical digital subscriber line) technology that allows the transport of data over plain old copper telephone lines at speeds up to 9Mbps. If they provide this service at a similar price with faster connections to the Internet backbone and better customer service, cable modems will face significant competition. But,

until ADSL is deployed and as long as usage patterns stay the same, 10Mbps access through cable modems will be very attractive. For the most part, using cable lines to access the Internet is still in the pilot stage. Only a dozen or so cities currently offer cable modem service for testing purposes. As mentioned earlier, many technical hurdles have to be overcome before cable modem service is widely available. Furthermore, hardware and transmission protocols must become standardized so that everything can work together and interchangeably. It is projected that cable Internet access won t be widespread until three to five years. And once that happens, you can probably buy a cable modem for about twenty percent higher than telephone modems and get service for about thirty dollars a

month. That s quite a deal considering ISDN service of today cost twice that, but connection speeds are only around 128kbps.