School networks and electrical equipment damage

Walter Bender walter.bender at
Thu Jun 6 17:58:29 EDT 2013

On Thu, Jun 6, 2013 at 5:54 PM, Hal Murray <hmurray at> wrote:
> dsd at said:
>> I have seen that some UPSs (unfortunately not these ones) allow a phone line
>> to be passed through them, supposedly offering some protection. Would such a
>> system protect against a lightening bolt, assuming thats what happened here?
> Surge suppressor is the buzzword you are looking for.  They will help, but
> nothing will stop a lightning strike that is near enough.  The only question
> is how-near.
> The wiki page looks good:
> Note the discussion about MOVs getting used up.
> Some outlet strips include a pair of phone jacks and/or cable TV connectors.
> That's the quick, simple, and low cost approach.  You can also get industrial
> type units at higher prices.  Google has lots of hits.

One thing to look out for with the outlet strips is band limiting on
the signal as it passes through; probably not an issue here, but worth

> I'm far from a wizard in this area.
> How many schools are you talking about?  If it's more than 2 or 3, it might
> be worth a phone call to one of the non-cheap places to see if they have
> suggestions.   (Or see if they have some documentation on the web.)
> --
> These are my opinions.  I hate spam.
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Walter Bender
Sugar Labs

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