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Shielded Network Cabling and Components
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Ethernet
networks are
pushing into
areas that
traditionally
have not
been
friendly to
data
communication.
Today’s
networks
span both
office and
industrial
areas. For
this reason,
L-com has
expanded our
selection of
shielded
cabling
products to
help meet
these new
demands. In
this
newsletter I
will discuss
what the
different
options are
for shielded
cables and
where or why
you might
need them.
What is
shielded
network
cable?
Traditional
category 5E
or category
6 cables
have four
twisted
pairs and no
shield. With
shielded
products, a
shield layer
is added to
help reduce
interference
to network
signals.
There are
several
different
types of
shielding
found on
network
cabling.
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Where do I use shielded cable?
The choice of a shielded cable or non-shielded cable often comes with experience. The electrical environment around the area you are installing the cable determines what is the best choice for that job. An area such as a production/factory floor where heavy equipment is being used is a prime example of a place where you might consider a shielded cable. |
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Extending an Ethernet
Network
Traditional 10/100Mbps
Ethernet networks utilize
Category 5,5E and 6 copper
cabling which has a distance
restriction of 100 meters
before you must repeat the
signal with a repeater. In
many cases large buildings,
campuses and Metropolitan
Area Networks (MANs) require
connection distances
covering thousands of
meters. |
One of the most popular
methods of extending an
Ethernet network is to use
fiber optic cabling.
• Multimode fiber cabling
can transmit data up to two
Kilometers
• Single mode fiber can
extend a network up to 100
Kilometers |
Advantages of Fiber over
copper cabling:
• Longer distances
supported
• Immunity to EMI/RFI and
lightning
• More secure than copper
cable, harder to tap |
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Another
widely used technology for
extending an Ethernet
network is wireless
extension. By utilizing
special external
high-powered antennas, you
can extend an Ethernet
network up to 40 Kilometers!
This is a great way to
extend remote networks that
may be far away from phone
and cable lines. |
Modulated
Channels Fuzzy?
Most
cable companies are switching to
digital to compete with DBS
systems. These digital cable
systems operate by adding a digital
cable box much like a DBS receiver,
the digital cable box enables the
consumer to watch digital
channels. Where the problem arises
is when one of these digital
consumers add a modulator for
camera's and satellite receivers to
view throughout the house. These
pictures will now come in fuzzy!
The reason is because the digital
cable is broadcasting in the same
frequency range. To solve this you
will need an inexpensive part called
a low-pass filter. This low-pass
filter will block all frequencies
above a given channel
range, creating a clean white-board
to place new modulated channels. As
the digital environment grows the use
of low-pass filters will increase.
Call us today if you have more
questions on how to filter selective
channels.
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©2008
Swiden Distributing, Inc - All
rights reserved. Please read SDI's
Privacy/Security Policy and Legal
Notices.
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