Ethernet linked access point appears sensitive to cable length wellbelow specified limits.

Robert Redelmeier <redelm@ev1.net.invalid> wrote:
> In comp.dcom.cabling DLR <news23@raleighthings.com> wrote in part:
> > I made a patch cord once. Then decided I had the cash to
> > buy them. With hooded and/or snag proof ends no less. At
> > a price that valued my labor at $1 or $2 an hour.

> Agreed. Even when you have the knowledge and the tools, crimping
> plugs is hard. Crimping on solid is fairly easy [dressing
> conductors] but prone to failure from flexing [work hardening].

Crimp plugs generally arn't intended for solid core. Even when it works
the contact area is likely to be rather less than it should be.

> Crimping on stranded (proper) is very difficult because the
> conductors won't stay dressed and shift when inserted into the plug.

It helps to untwist and straighten the wires before putting them in the
right order and trimming to length.

> I believe production machinery uses a duck-bill clamp to hold the
> conductors aligned. I've never seen pliers for this.

How would you use pliers? In order for the outer jacket to be held the
optimal wire length tends to be around 15mm.


> -- Robert


--
Mark Evans
St. Peter's CofE Aided School
Phone: +44 1392 204764 X241
Fax: +44 1392 204763

In comp.dcom.cabling Mark Evans <mpe@st-peters-high.devon.sch.uk> wrote:
>
> Crimp plugs generally arn't intended for solid core.

Some are, some aren't. Some plugs are specifically intended for solid
cable, some are specifically intended for stranded cable, and some are
universal models that can be used for either. See, for example:

<http://hyperlinesystems.com/catalog/jacks/>

But you are correct that plugs should normally be used only on stranded
cable.

-- Larry Jones

The real fun of living wisely is that you get to be smug about it. -- Hobbes

lawrence.jones@siemens.com fired this volley in
news:482b3bf8$0$6067$88260bb3@news.teranews.com:

> In comp.dcom.cabling Mark Evans <mpe@st-peters-high.devon.sch.uk>
> wrote:
>>
>> Crimp plugs generally arn't intended for solid core.
>
> Some are, some aren't. Some plugs are specifically intended for solid
> cable, some are specifically intended for stranded cable, and some are
> universal models that can be used for either. See, for example:
>
> <http://hyperlinesystems.com/catalog/jacks/>
>
> But you are correct that plugs should normally be used only on
> stranded cable.
>

And then, there are those really special(ly priced) plugs for Litz
wire... <G>

LLoyd

Lloyd E. Sponenburgh wrote:
> And then, there are those really special(ly priced) plugs for Litz
> wire... <G>

"Litz wire..is that still around?" <- Homer Simpson

In comp.dcom.cabling Mark Evans <mpe@st-peters-high.devon.sch.uk> wrote in part:
> Robert Redelmeier <redelm@ev1.net.invalid> wrote:
>> Agreed. Even when you have the knowledge and the tools, crimping
>> plugs is hard. Crimping on solid is fairly easy [dressing
>> conductors] but prone to failure from flexing [work hardening].
>
> Crimp plugs generally arn't intended for solid core. Even when it
> works the contact area is likely to be rather less than it should be.

There are plugs specifically designed for solid core. They usually
have a cut in the tooth so it straddles the core as it does IDC. I
do not doubt this IDC is reliable. However, flexing will deteriorate
any connection. This is where the AMP mid-crimp is clever.

>> Crimping on stranded (proper) is very difficult because the
>> conductors won't stay dressed and shift when inserted into the plug.
>
> It helps to untwist and straighten the wires before
> putting them in the right order and trimming to length.

This [dressing] is sufficient with solid core but
stranded still flops around more than you might like.


>> I believe production machinery uses a duck-bill clamp to hold
>> hold the conductors aligned. I've never seen pliers for this.
>
> How would you use pliers? In order for the outer jacket to
> be held the optimal wire length tends to be around 15mm.

Obviously not common pliers. Specially made angled, grooved,
duck-bills would clamp all 8 wires and hold them aligned ~8mm
inside the plug, only requiring ~7mm free [cantilevered].

-- Robert