Phil Addison wrote:
On Sat, 25 Jul 2009 00:41:35 +0100, in uk.d-i-y John Rumm
wrote:

As usual, for your delectation / derision etc:

http://wiki.diyfaq.org.uk/index.php?..._wiring_system


Article much appreciated John, especially sections 1-3 that answer the
question long in my mind "what thef' is structured cabling all about?".
But any idea why its called structured? It doesn't seem to have any
structure at all, just a clever method of re-configuring, the price
being that you put in loads of wiring much of which may never be used
(at least concurrently). I always assumed 'structured' implied some kind
of hierarchy. Well, now I know, thank you!

Well there is a hierarchy - however I have only concentrated on the bit
of it that is likely to be of interest in a domestic or small commercial
setting (the so called "horizontal cabling" where a central hub fans out
to individual work locations).

More structure comes in when you start to consider backbone cabling
(i.e. cables between central hubs, and hubs / server rooms), "Entrance"
cabling - i.e. getting external services like phone and data links into
the central hubs etc. You can even consider the patch lead cabling from
fixed wall ports to equipment separately if you want (which, thinking
about it I ought to mention in the article).

(have a look at he wikipedia article link at the end - that gives a
slightly bigger picture)

A couple of minor points reading through the rest of it...

How many wires/pairs are there inside a catx cable? Perhaps mention that
catx cable is what you are familiar with connecting your computer to
router/cable modem (so long as its not a USB cable modem).

In Cat5e there are 4 pairs. Of which an analogue voice channel will use
1, a 10 or 100 Mb ethernet connection will use 2, and a gigabit or
higher ethernet connection will use all 4.

In "Material (10).." definition of LAU has not yet been given. It's
found much later near the end of the article.

Ta, I will go fix...

ok, try that; a modified "how does it work" section...

--
Cheers,

John.

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