RE: RE: CAT5 - IDC Terminating

["Mike Griffiths" <mike@xxxxxxxxxxxx>]

I think sometimes you worry too much Keith

I have all my Cat5 runs going through Krone blocks

And for testing they go through  patch panel as well

It all works fine

Most runs are >25m

Mike





From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf
Of Keith Doxey
Sent: Tue 12 September 2006 18:20
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] RE: CAT5 - IDC Terminating



Hi Chris,

Whilst a BoxConn 251 and StripsConn 237A will connect the wires together
and
give electrical continuity I feel it is only fair to point out that
terminating a cable pair on a 23A involves untwisting about 1.5 inches
of
wiring, double this because you also have the connection to the lower
half
of the strip and you have almost 3 inches of untwisted pair.

All CAT5 installation guides state that no more than 0.5 inches of cable
should be untwisted so as to preserve the interference rejection
properties.

Even if you dont need the flexibility, I personally would use patch
panels
and short jumper cords to join the cables as it would retain the
integrity
of the CAT5 wiring scheme.

One other thing to mention, the StripsConn 237A handle 10 pairs of
wires.
For joining CAT5 cables you have two methods of wiring them.

1. only use 8 pairs on each strip to join 2 CAT5 cables.

Cable 1 - pairs 1,2,3,4
Cable 2 - pairs 7,8,9,10
etc

2. split every third cable over two strips which gets very messy

Cable 1 - Strip 1 - pairs 1,2,3,4
Cable 2 - Strip 1 - pairs 5,6,7,8
Cable 3 - Strip 1 - pairs 9,10
Cable 3 - Strip 2 - pairs 1,2
Cable 4 - Strip 2 - pairs 3,4,5,6
Cable 5 - Strip 2 - pairs 7,8,9,10
etc

By using patch panels you can keep it much neater using either two
panels
for incoming and outgoing, or a two row panel with in and out on
different
rows.

Regards

Keith

> -----Original Message-----
> From: Chris Miles [mailto:chrismiles@xxxxxxx
<mailto:chrismiles%40blueyonder.co.uk>
]
> Sent: 12 September 2006 16:19
> To: ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
> Subject: [ukha_d] RE: CAT5 - IDC Terminating
>
>
> regarding mhy previous post about extending my CAT5 cables.
>
> I got a 251A connection box
>
> http://shop.austin-taylor.co.uk/index.cfm?event=catalogue.product&;
productID=16112&categoryID=1243

and 237A termination strips.

http://shop.austin-taylor.co.uk/index.cfm?event=catalogue.product&produc
tID=
16160&categoryID=0

Is this all I should need?

I assume I just punch down each wire that im joining together?

Chris


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