Cable Modems And ADSL

Want to read the rest of this paper? Join Essayworld today to view this entire essay and over 50,000 other term papers

expensive network solution because of its shared architecture, but that differential is more than offset by infrastructure costs required to upgrade existing networks.
The largest advantage of ADSL, and it is a significant one, is the number of telephone lines already installed that can support ADSL, or prospectively available with network upgrades. Today the global ratio is in the order of 400 million to 6 million, or about 60 to 1. Aggressive upgrades will not improve the ratio to better than 10 to 1 in the next five or six years. Even in the United States the ratio today is in the order of 20 to 1, and will not likely get better for CATV suppliers than 3 to 1 over the next five or six years.

The end of 1997 will have sold two hundred million personal computers. At present run rates, another 240 million will be added by 2001 as PCs start to approach the global population of televisions. Small offices and residences will absorb at least 25% of them, or 100 million. Forester has ...

Get instant access to over 50,000 essays. Write better papers. Get better grades. Already a member? Login

combine the two multiplexing methods. A few modem companies are proposing techniques like spread spectrum or code division multiplexing ffb to provide more robustness in the presence of ingress noise.) Cable modem rates do not depend upon coaxial cable distance, as amplifiers in the cable network boost signal power sufficiently to give every user enough. Variation in cable modem capacity will depend rather on ingress noise in the line itself and the number of simultaneous users seeking access to a shared line.

ADSL. Asymmetric Digital Subscriber Lines locate modems on either end of existing copper telephone lines. As the name suggests, they realize downstream speeds up to 9 Mbps, but ...

Succeed in your coursework without stepping into a library. Get access to a growing library of notes, book reports, and research papers in 2 minutes or less.

CITE THIS PAGE: