Effect of electromagnetic interference
on Dial up connection
Dial up connections are easy to set up as they connect through
telephone line. However, they also inherit some limitation due
to the dependency on standard telephone lines. The dial up connection
suffers from a major problem that we discuss here…
Scientifically, electronic appliances or circuits do induce electromagnetic
fields. In case of a dial up connection set up an electromagnetic
field does create a distortion. In fact, one of the major causes
of frequent dial up disconnection is Electromagnetic interference.
It can be a factor in causing your modem to disconnect again and
again. Furthermore, it may also cause damage to the circuitry
of the modem device.
Unfortunately, most residential phone line wiring is susceptible
to such interference. This happens mainly because of lack of proper
shielding or insulation. Older phones lines can also create line
noise due to distortion. Since they were never designed to take
into consideration modem use, they will be affected. Poor quality
phone wiring is a common problem in older houses. The fact is
that the wiring in the old premises that was used for voice phone
calls may have been adequate for verbal communications. However,
fax machines and modems used today require much higher quality
Most of the households do bear other electronic items that may
be situated near your dial up
connection setup. This may be another source of distortion.
Also, the high speed modems are very sensitive to this kind of
errors. Hence, it may also not give you the desired performance
resulting in low connection speed, fluctuations or slow connections
and frequent disconnections.
To save this valuable equipment from damage due to electromagnetic
interference, there are certain precautions that dial up connection
users should use.
1. The phone line should not be wired near to
high end electronic systems such as computers and home theater
systems as they produce heavy electromagnetic field when they
2. If the wiring in the premises could be upgraded
then it will be definitely beneficial to your dial
up connection equipment.
3. Electric appliances such as lights with dimmers
or lights that use fluorescent bulbs and other electrical appliances
that use a lot of power should not be kept active near your phone
connection for a long time.
4. Electronics devices such as TVs, radios and
microwave ovens emit Radio frequency waves. This may damage the
wiring. So, make sure to position then at a good distance from
your phone line.
5. Devices with motors such as fans are sources
interference if they are wired in the same channel as your
phone line. So if possible connect them separately.
6. Make sure that your phone line does not run
parallel to other wiring for long distances.
Overall, you may not be able to keep your dial up connection
setup away from all the sources of problems. However, taking precautionary
steps time to time and regular maintenance will keep your dial
up connection set up from breaking down.
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Effect of Additional Phone
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Effect of Electromagnetic
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of Dialup Connection Speed.
Evolution of Dialup Modems.
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is ISDN (Integrated Services Digital Network)?
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