When you can't get DSL

Why ISDN?



Download progress

When you go to the store (the real one, not the internet one) do you get in the long checkout line or the short one? Do you get behind the Lady with seven kids and three shopping carts or the bachelor with a frozen pizza? It's time you got in the fast lane with your internet connection. If you can't get DSL, ISDN is the fastest, most economical way for home users in our area to get on the internet.

ISDN offers dial up users 64K and/or 128K digital access to the internet. A typical dial up analog connection that use a modem over your phone gets a 33.6K connection. Some modems support up to 53K, but that speed is one way (your upload speed is reduced) and not reliable. Around our area people in the city limits do good to get 45K. In the country, speed plumets to 26K or worse.
The reason is that analog signals use voice quality circuits. Your modem turns computer information that is digital into sounds that go over a standard voice phone line. To the human ears this sounds like that static you hear after all the beeps and tones when your modem first connects. This sounds are sensative to noise you can't even hear. (Maybe a dog can, but I don't know.)
The squealing sounds you hear when you first connect are the two modems trying to agree on a connection speed. They step down (slowing the speed) until the number of errors (noise on the line) drops to a point to where the net throughput (errors have to be resent) is as high as possible. For example a 40K connection with 20% errors is worse than a 33.6K connection with 1% errors. And there are a lot of errors when you go above 33.6 with v.90 or Kflex on those 56k modems around our area.
The Solution is ISDN which is a digital phone line and digital modem (or terminal adapter). The signals on ISDN stay digital the entire way - the speed is always 64K or 128K. An ISDN phone line comes with two channels, you can surf on one and talk on the other; Or you may choose to use both channels for internet and get the 128K speed.
What it takes is an ISDN phone line from a local phone company and an ISDN internet account from CSS Internet Service or another ISP. Bell charges about twice as much for an ISDN line as a standard analog line, but remember you're getting two lines. For the typical user, the ISP charge for 64K is only five dollars more than analog with CSS. Chances are, if you surf a lot, you have a seperate computer phone line anyway, thus you get the great speed for the about the same thing you're paying monthly for now. Simply get the ISDN and drop the other lines.
There are some one time charges: You do have to buy an ISDN modem (it's really called a terminal adapter because a modem modulates data signals into sound which ISDN doesn't do). And you may have to pay an installation charge to your phone company. You will want to check with your long distance carrier as well to make sure you can get the calling plan you want.

Call today and tell us you want to blaze on the internet at ISDN speeds:
836-9437 or 836-0191
In Dyersbyurg 285-5936
By e-mail
CSS Internet Services
ECSIS.NET


A Practical Example:
The following link goes to a radar image for Memphis and the surrounding area. On ISDN, you can expect the image to load in 5 seconds (The entire page may take longer depending on the number of ads). How long does it take your analog connection? This test only works the first time you visit because your browser will cache the page for second and subsquent visits.
Intellicast Memphis Radar.

Another test is the two links below. The both display the same picture, but one is saved in a way to be larger in file size. The difference in the size approximates a difference in bandwidth similar to what is seen between ISDN and 33.6 analog. After the first time you will have to use CONTROL-F5 to force your browser to reload the image, otherwise it will pull it from your cache.
ISDN Image
33.6 Image


64K sounds good to me, but 128K sounds better - Let me explain how this works. Most people who get 128K set it up for bandwidth on demand (more on this later). A 128K account comes with 300 64K hours or 150 128K hours, but you can mix it up any way you like. Suppose you were on 128K for 25 hours and 150 hours at 64K. This only uses 200 (150 + 25x2) hours of your 300. But you just want to go 128K all the time, right? Well there isn't a big difference between 128 and 64 unless you are downloading large files or graphics. If you are surfing, using chat or e-mail, your connection will be 64K. Then when you start downloading something, the other channel kicks in automatically to give you 128K. This is called bandwidth on demand and is a feature of most ISDN modems (terminal adapters). With both channels running data, you can downlaod a meg a minute. On sites that aren't overlaoded, you can stream most MP3 files at this speed. The cost of 128K is more than 64K but not quite twice as much. Consult the ECSIS.NET Pricing page for current prices.



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This page last updated Wed Feb 5 21:31:56 CST 2003 and © 1996-2003 by Custom Software Solutions. For corrections, omissions, comments or suggestions click here. Look at CSS Internet Service for information on the complete line of Internet services for Lauderdale County. CSS is a private company owned and operated in Lauderdale County, Tennessee. This web site has no affiliation with any government entity. Some links may lead to external sites, we cannot control the content of any external site. If a link from this page leads you to an undesirable site, please let us know using the suggestion link above.