Communications
Communications
technology - first the telegraph, telephone and television,
and today the Internet - has pretty much put the carrier
pigeon out of business.
Just as
businesses link their office computers, parents are networking
at home to share Web connections among family members.
Grandparents exchange e-mail and pictures with their
grandchildren. Students file book reports and get test grades
online. Communicating in this brave new world has never been
easier.
That's the good
news. The downside is that most homes still lack the internal
wiring capacity for this and other technology yet to come. And
it's not just future technology that's "on the
line." The increasingly sophisticated equipment most of
us already have in our homes today also requires updated
wiring - right now.
What
is Communications Wiring?
Let's begin with
some basic terminology. "Broadband" is an often-used
term that applies to both the digital equipment that demands
additional wiring capacity, as well as to the transmission
methods that deliver it. Broadband exists today in such
applications as high-speed Internet access, streaming audio
and video, and home networking. To enable these technologies
to work at optimum efficiency - or to work at all, as many
home computer users have discovered, consumers need to upgrade
their homes' existing wiring "infrastructure."
It's all about
the wiring. Think of communications wiring as a pipeline. If
you want more data-carrying capacity, you need a pipe with
greater diameter. Obsolete, old-style telephone wiring just
can't cut it. Fortunately, the wiring that can handle all of
our communications needs, now and in the foreseeable future,
is available today at modest cost - and it doesn't have a
pipe-size diameter. It's called Category wiring.
Category wiring
contains four pairs of tightly twisted, high-quality copper
wires that can handle multiple phone lines and support
high-speed digital communications. Sometimes mated with new,
improved RG6 coaxial cable for video signals, this
"structured wiring" package is a potent carrier for
a home's total electronic needs, from digital feature-phones
to home computer networks. As technology and electronics
continue to advance, the need for Category wiring in homes
will be unavoidable. To learn more, read Should
I Upgrade?
Wiring
Throughput of Signal Conductors
Throughput
in IT
is the speed at which a computer
or network
processes data
end to end. It therefore is a good measure of absolute
performance, and we frequently will see internet connections
rated in terms of how many bits
they pass per second (bit/s).
However it is a
very bad measurement of perceived performance, which is mostly
based on how quickly it responds to you. Responsiveness has
far less to do with throughput than latency.
As the classic example goes, a station wagon full of magnetic
tape has excellent throughput and horrible latency. It may
take a week to deliver data from California to New York, but
can carry so much that the throughput is better than
broadband. Yet a user who has to wait a week to see a web page
will complain that they preferred their much faster
dialup connection!
| Wire Type |
Description |
Used For |
Relative Capacity |
| Standard Telephone Cable |
A pair of twisted wires per telephone line. |
Was for telephone, no longer suitable for use. |
1/10" Drinking Straw |
| Category 5 Twisted Pair |
4 twisted pairs of high-capacity wire enclosed in an
insulated sheath |
Normal telephone, fax, modem and infrared signals plus
higher speed connections such as ISDN and networks. |
3/4" Garden Hose |
| RG6 Coaxial Cable |
Heavily shielded and insulated copper core |
Video signals, digital signals |
3.5" Fire Hose |
| Fiber Optic Cable |
Glass-lined cable passing laser light pulses which
transmit voice, data and image signals at the speed of
light |
Capacity is high enough to handle all data currently
exchanged in the home or planned for the future |
10-foot Culvert |