Steven M. Bellovin wrote:
>In message <[EMAIL PROTECTED]>, Aditya writes:
>
>
>
>
>
>>The short-term solution seems to be using the APC PNET1s/Tripplite
>>DNET1/etc. in each unit and tying them to the water main as an
>>inexpensive, immediate step while funds are allocated for conduit,
>>labo
In message <[EMAIL PROTECTED]>, Aditya writes:
>
>
>The short-term solution seems to be using the APC PNET1s/Tripplite
>DNET1/etc. in each unit and tying them to the water main as an
>inexpensive, immediate step while funds are allocated for conduit,
>labor etc..
>
If I recall correctly, the Nat
> On Tue, 13 Sep 2005 20:24:51 +, "R.P. Aditya" <[EMAIL PROTECTED]> said:
> I have a bunch of cat5 buried about 1 ft below the surface
> connecting multiple buildings on a campus (short runs) and lightning
> strikes nearby have caused surges along one or more of the cables
> and burnt out swit
On Tuesday 13 September 2005 03:24 pm, R.P. Aditya wrote:
> Anyone have recommendations (tested/practical is best :-)?
First bond the cable shield to earth at the entry point in both buildings.
Second use a Tripplite DNET-1 at both buildings. make sure you have a single
point ground terminal t
Speaking on Deep Background, the Press Secretary whispered:
>
>
> re: ""what did your electricians say ..."
>
> Back to lurking in a moment, but I should note that fire and safety code
> issues
> are so shrouded in matters of locality and jurisdiction, at times, and bound
> up
> in industry a
MAIL PROTECTED] Behalf Of
> Frank Coluccio
> Sent: Wednesday, September 14, 2005 10:52 AM
> To: nanog@merit.edu
> Subject: Re: CAT5 surge/lightning strike protection recommendations?
>
>
>
> There's not much left to interpretation a
There's not much left to interpretation and preferences here, aside
from the choice of medium to be used. I should also add that some of the
advice that has been posted in this thread, as well-meaning and thoughtful as it
has been, has been downright dangerous to follow.
If one is going to run co
In message <[EMAIL PROTECTED]>, "Marshall Eubanks" writes:
>>
>> My direct experience with running long-distance underground cable is
>> dated -- let's put it like this; we were dealing with RS-232 -- but the
>> countermeasures to a direct strike on copper cables don't seem to have
>> improve
On Wed, 14 Sep 2005 08:44:16 -0400
"Steven M. Bellovin" <[EMAIL PROTECTED]> wrote:
>
> In message <[EMAIL PROTECTED]>, "Robert E.Seastrom" writes:
> >
> >
> >Todd Vierling <[EMAIL PROTECTED]> writes:
> >
> >> Seriously, though, that's exactly what you're describing, and about what
> >> I'd
> >>
In message <[EMAIL PROTECTED]>, "Robert E.Seastrom" writes:
>
>
>Todd Vierling <[EMAIL PROTECTED]> writes:
>
>> Seriously, though, that's exactly what you're describing, and about what I'd
>> suggest in a no-other-option scenario -- but if it's possible to pull fiber
>> through the conduits, it wo
Todd Vierling <[EMAIL PROTECTED]> writes:
> Seriously, though, that's exactly what you're describing, and about what I'd
> suggest in a no-other-option scenario -- but if it's possible to pull fiber
> through the conduits, it would probably be far less expensive long term, or
> even medium term
As everyone else has said, fiber is best, but if that is not an option...
We have had good luck using these:
http://www.hyperlinktech.com/web/hgln_cat6.php
Trancievers will work as well, but that is a more expensive option.
Nothing is going to protect you from a direct strike.
Jerry
On Tue, 13 Sep 2005, David Lesher wrote:
> Put a fiber transceiver in building A. At least 10 foot away,
> put in a 2nd transceiver and connect THAT to the CAT5 going to
> building B. Connect A & B wallwarts to different breakers, with
> surge protectorsand stock spares.o
That's an amazingl
David Lesher wrote:
>
>Surge protectors can not protect you from ground differential issues.
>
>
True enough - but 10/100 Ethernet is normally isolated by the
transformer on the Ethernet transceiver. AFAIK there is not a
connection between the signal lines and ground. Isolation is 1500V for
t
Speaking on Deep Background, the Press Secretary whispered:
>
>
> I have a bunch of cat5 buried about 1 ft below the surface connecting multiple
> buildings on a campus (short runs) and lightning strikes nearby have caused
> surges along one or more of the cables and burnt out switch ports. I w
R.P. Aditya wrote:
>I have a bunch of cat5 buried about 1 ft below the surface connecting multiple
>buildings on a campus (short runs) and lightning strikes nearby have caused
>surges along one or more of the cables and burnt out switch ports. I would
>like to protect the switch ports -- there se
On Wed, 14 Sep 2005 12:24:39 +1200 (NZST)
"Mark Foster" <[EMAIL PROTECTED]> wrote:
>
> >
> > I have a bunch of cat5 buried about 1 ft below the surface connecting
> > multiple
> > buildings on a campus (short runs) and lightning strikes nearby have
> > caused
> > surges along one or more of the
>
> I have a bunch of cat5 buried about 1 ft below the surface connecting
> multiple
> buildings on a campus (short runs) and lightning strikes nearby have
> caused
> surges along one or more of the cables and burnt out switch ports. I would
> like to protect the switch ports -- there seem to be l
>
> Anyone have recommendations (tested/practical is best :-)?
>
> The APC Protectnet PNET1 and PRM24 seem quite nice and not
> too expensive --
> if they workpros? cons?
It sounds like you're either out of NEC, or, you are grounding them
to waterpipe. I believe NEC calls for grounding v
Fiber would be my choice. Not only will it solve the lightening strike
problem; you will not have to worry about
ground potentials being different on each side of the cable run.
James
Routing and Security Administrator
At the Santa Fe Office: Cyber Mesa Telecom
[EMAIL PROTECTED] [EMAIL PROTECTED
On Tue, 13 Sep 2005, R.P. Aditya wrote:
> I have a bunch of cat5 buried about 1 ft below the surface connecting multiple
> buildings on a campus (short runs) and lightning strikes nearby have caused
> surges along one or more of the cables and burnt out switch ports.
Don't do that, then.
> I wo
ehalf Of
R.P. Aditya
Sent: Tuesday, September 13, 2005 4:25 PM
To: nanog@merit.edu
Subject: CAT5 surge/lightning strike protection recommendations?
I have a bunch of cat5 buried about 1 ft below the surface connecting
multiple buildings on a campus (short runs) and lightning strikes nearby
have cau
I have a bunch of cat5 buried about 1 ft below the surface connecting multiple
buildings on a campus (short runs) and lightning strikes nearby have caused
surges along one or more of the cables and burnt out switch ports. I would
like to protect the switch ports -- there seem to be lots of product
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