TUCOWS ARTICLE

Tell Me About... DSL - Part 2

Part two in this two-part article on DSL.
Published: Aug 10, 2006
Author: Michael E, Callahan
Related OS: Windows

DSL - Part 2

by Michael E. Callahan aka Dr. File Finder


This question submitted by Andy Watson, Janet Pullman, RobertoSamson, Aliyah Verner, Paula VanDam and numerous others

Last week I talked in basic terms about what DSK is and how itworks. By capitalizing on all of the extra bandwidth in your home phone,DSL, also called ADSL, is able to give big speed benefits over a 56Kmodem. At the same time, however, it isn't enough speed to bring youtelevision, movies, and Internet. A new type of DSL, called VDSL,delivers very high bit-rates when transporting data. By "high" I'mtalking in the area of 52 Megabits per second. Don't think that'sfast? Well, regular DSL generally runs around 8 Mbps.

You may recall that DSL utilizes all of the extra bandwidth that's foundin the copper wires in your phone? Well, as fate would have it thosesame copper wires put a "crimp" into VDSL. Why? Because utilizing thecopper wires VDSL can go less than a mile, about 4,000 feet or so. Lifeis always full of little ironies.

To get around this serious limitation phone companies are installingfiber-optic cable. Utilizing the cable the distance limitation issolved. I've read a number of articles that seem to indicate that phonecompanies around the country will be installing fiber-optic cable. Thiswill allow them to offer services well beyond just telephone.

ADSL and VDS: are just two of a number of different types of DSL. Forexample, VoDSL is used to have multiple lines in one line that can alsotransmit data. Another variation is RADSL which stands for Rate AdaptiveDSL. This type will adjust the speed based on the quality.

As is often typical in the technology industry there are a number ofdifferent "standards" in the area of DSL. This has been true withthings like modems, VHS and Beta tapes, and DVD - and +. As morestandardization takes place I think you can expect to see VDSL to spreadfairly rapidly.

I hope these articles have given you a better understanding of what DSL is, howit works, and where it's going in the future. Technology keeps movingand growing faster and faster. I think back to the early days when I wastransferring files at 30 characters per second. We've come a long way.

I'd like to thank Andy Watson, Janet Pullman, Roberto Samson, AliyahVerner, Paula VanDam and numerous others for askingthis question.

If you have a question on any technology topic that you'd like someoneto tell you about you can submit it via email by clicking HERE You will not receive a reply, but all topics will be considered.



About Michael E, Callahan

Michael E. Callahan, known around the world by the trademarked name Dr. File Finder, is regarded as the world's leading expert on shareware. Dr. File Finder works with software programs and developers full-time, and in the average year he evaluates 10,000 programs. Since 1982 he has evaluated over 250,000 software and hardware products. Mr. Callahan began evaluating software online in 1982 and no one has been at it longer. He currently works doing online PR and marketing for software companies, and is the Senior Content Producer for Butterscotch.Com.

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