Re: Network Wiring

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I think it would be safer to keep the high AC voltages associated with
ringing on landline phones away from ethernet:

from http://www.derose.net/steve/guides/wiring/
*Warning:* When the phone rings, the voltage generates an electromagnetic
field, which in turn generates voltage in the adjacent Ethernet wires. Since
Ethernet runs at about 2-5 volts rather than this 50-90 volts, conceivably
an Ethernet card or hub could be burned out ($$). My guess, though, is that
recent Ethernet cards include surge protection that is good enough to handle
ringer-induced interference as well. If you're worried, avoid this kind of
wiring or add surge protection (such as the Leviton
5952<http://www.twacomm.com/Catalog/Model_5952.htm>or the cheaper APC
ProtectNet<http://www.amazon.com/exec/obidos/tg/detail/-/B00006BBGX/102-8642873-3337757?v=glance>
).

Also when power lines fall down on telephone lines you could have much more
than 100 VAC which could result in a lot of damage.  I once worked
controlling a circuit in an telephone exchange that would test the line for
more than 100Volts AC or DC before connecting the exchange to an external
line.

John Bundy


On Mon, Jun 20, 2011 at 12:21 PM, Jay Strauss <[email protected]> wrote:

> Hi,
>
> I remember once someone mentioned a 3in1 type of low voltage wire
> (cat6, phone, co-axial).  It came all nice in a single housing cable.
> I can not find it in the luni archives.
>
> What is the name of this type of wire?
>
> Thanks
> Jay
> --
> Linux Users Of Northern Illinois (Chicago) - Technical Discussion
> http://luni.org/mailman/listinfo/luni
>

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I think it would be safer to keep the high AC voltages associated with ring=
ing on landline phones away from ethernet:<br><br>from <a href=3D"http://ww=
w.derose.net/steve/guides/wiring/">http://www.derose.net/steve/guides/wirin=
g/</a><br>
<b><font color=3D"red">Warning:</font></b> <a name=3D"warning"></a>When the=
=20
phone rings, the voltage generates an electromagnetic field, which in=20
turn generates voltage in the adjacent Ethernet wires. Since Ethernet=20
runs at about 2-5 volts rather than this 50-90 volts, conceivably an=20
Ethernet card or hub could be burned out ($$). My guess, though, is that
 recent Ethernet cards include surge protection that is good enough to=20
handle ringer-induced interference as well. If you&#39;re worried, avoid=20
this kind of wiring or add surge protection (such as the <a href=3D"http://=
www.twacomm.com/Catalog/Model_5952.htm">Leviton 5952</a> or the cheaper <a =
href=3D"http://www.amazon.com/exec/obidos/tg/detail/-/B00006BBGX/102-864287=
3-3337757?v=3Dglance">APC ProtectNet</a>).<br>
<br>Also when power lines fall down on telephone lines you could have much =
more than 100 VAC which could result in a lot of damage.=A0 I once worked c=
ontrolling a circuit in an telephone exchange that would test the line for =
more than 100Volts AC or DC before connecting the exchange to an external l=
ine.<br>
<br>John Bundy<br><br><br><div class=3D"gmail_quote">On Mon, Jun 20, 2011 a=
t 12:21 PM, Jay Strauss <span dir=3D"ltr">&lt;<a href=3D"mailto:[email protected]=
om">[email protected]</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote=
" style=3D"margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, =
204); padding-left: 1ex;">
Hi,<br>
<br>
I remember once someone mentioned a 3in1 type of low voltage wire<br>
(cat6, phone, co-axial). =A0It came all nice in a single housing cable.<br>
I can not find it in the luni archives.<br>
<br>
What is the name of this type of wire?<br>
<br>
Thanks<br>
Jay<br>
<font color=3D"#888888">--<br>
Linux Users Of Northern Illinois (Chicago) - Technical Discussion<br>
<a href=3D"http://luni.org/mailman/listinfo/luni" target=3D"_blank">http://=
luni.org/mailman/listinfo/luni</a><br>
</font></blockquote></div><br>

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