Understanding the high speed
dial up connection
There are many people who use but do not understand how dial
up connection work. Here we explain the functionality of a dial
up connection. As you are aware the dial up connection is
made from your computer through modem and telephone line to your
ISP’s computer. Your computer is a digital machine meaning
that it transmits 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.
Most hardware modems are very sensitive to phone line conditions
both inside your house and outside on the telephone company's
network. In order for modems to work the way they are intended
there must be no more than one Analog to Digital conversion between
your computer's modem and your ISP’s computer. If there
are any more analog to Digital conversions than one you will not
achieve the highest possible speed on your dial up connection
due to the decreased integrity of the signal.
The telephone line from your house is terminated in a set of
special machinery that allows the audio signal from your house
to enter the Public Switched Telephone Network (PSTN) where it
is routed to the person or ISP that you are calling. The way your
modem sends data is as follows:
[Your Computer] > [Digital signal] > [Your Modem]
> [Analog signal] > [Telephone line] > [ISP’ modem]
> [Digital signal] > [ISP server]
When the data is sent back to you, it would be like as below:
[ISP server] > [ISP’ modem] > [Analog Signal]
> [Telephone line] > [Your Modem] > [Digital Signal]
> [Your Computer]
In order to achieve speed on the data going to you from the internet,
server may use all digital connection with the telephone company
to keep the signal intact until it reaches your local phone line,
eliminating one of two Analog to Digital conversions. This will
allow modem download speeds as high as 53 Kbps. If along the way
back from server to you if there is an additional Analog to Digital
conversion, you will not receive a full speed connection.
There are other factors like electromagnetic distortion or the
quality of the telephone line that may interfere with the data
flow. The fact is that the telephone system is designed to host
voice phone calls which require far less quality than a dial up
connection requires. So, it may not support very high speed dial
up. Similarly, quality of the modem is also important. If the
modem is very old of lower quality then it may also contribute
to loss of speed. 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
More Useful Information on
Free Dialup Connections,
Internet, Broadband, Modems..
(Asymmetric Digital Subscriber Line) FAQ's
is ADSL (Asymmetric Digital Subscriber Line)?
Transfer in Dialup Modem.
Connection Modem Issues.
Connection Speed and Throughput.
Connection and your Telephone Line..
Connection with V.92 Modem.
Effect of Additional Phone
Equipment on Dialup.
Effect of Electromagnetic
Interference on Dialup Connection.
of Dialup Connection Speed.
Evolution of Dialup Modems.
of Dialup Internet Access.
is ISDN (Integrated Services Digital Network)?
to Dialup Connection.
Issues Causing Dialup Connection Failure.
Features of a Good ISP?
Types of Hardware Modems.
and Dialup Connection Speed.
Rate Dialup Connection Fraud.
Access Numbers Dialup Scam.
up the Initial Connection Process.
To Check if your Modem does not Dial.
Steps to Troubleshoot Slow
Dialup Connection Speed.
Understanding the High Speed
Understanding Internet Connection
the Working of a Modem.
Modem Technology FAQ.