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Dialup UK Article - Understanding the Functionality Of
A High Speed Dialup Connection
There are many people who use but do not understand how dial
up connection work. Here we explain the functionality of a
high-speed dial up connection. The journey of the data goes
into a great loop across the world at a very fast rate. Most
people do not know how data travels once it leaves their computer
terminals and phone line.
The dial up connection is made from a computer through modem
and telephone line to the ISP’s computer. The computer
uses data in digital form. It means that it the computer can
transmit data in 1's and 0's (on and off) also called digital
or binary form. On other hand, telephone lines transmit data
in analog form. It means that they transmit data by sound.
Modems work by taking a digital signal and transforming that
into analog (sound) over a phone line. It also receives data
in analog form and converts it to digital form. The digital
data given to the modem is in the form of ones and zeros.
The modem converts it to analog signals and sends over the
phone line. Modem at the receiving end receives these signals;
converts data back into digital form and sends the data to
the receiving computer. The telephone line from your house
is joined to a special terminal that sends the data received
from their computers in form of audio signals from to enter
the Public Switched Telephone Network (PSTN). From PSTN, it
is routed to the person or ISP that the modem is calling through
the internet.
It is import that there should be no more than one Analog
to Digital conversion between your computer's modem and your
ISP’s computer. This ensures that the modems will be
able to work correctly. This will also allow modem download
speeds as high as 53 Kbps. It may be possible for the modem
to achieve more then one analog to Digital conversions simultaneously.
However, if there are any more analog to Digital conversions
initiated from the modem then the modem may not be able to
achieve the highest possible speed on your dial up connection
due to the decreased integrity of the signal. Similarly, if
there is an additional Analog to Digital conversion along
the way back to you then you will not receive a full speed
connection speed.
It is important to note that the modem’s ability to
transfer data and maintain quality of the data does depends
on the phone line conditions both inside your house and outside
on the telephone company's network. Unfortunately, the telephone
system is primarily designed to host voice phone calls that
require far less quality than a dial up connection requires.
Therefore, it may not support high-speed dial up connection
to its full capability. Another important factor is quality
of the modem. If the modem is very old of lower quality then
it may also contribute to loss of speed. There are other factors
like electromagnetic distortion, which may interfere with
the data flow though your dial up connection. Hence, it is
better to have a modem of good quality and have your telephone
line checked and upgraded if required to get high-speed dial
up connection speed.
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