Vic,

A well put response.

Duane

On 14 Feb 1997, Victor L. Boersma wrote:

> All these worthy analysts assume that the risk has to be an internal risk.  
> That
> is not the case with distributed equipment.  Faulty bonding and grounding in 
> the
> building can cause enormous potential differences in building steel and ground
> paths, in case of lightning strikes.  Whether you are talking about a PABX or 
> a
> LAN, as soon as you start stringing things together throughout a building, you
> can no longer look only at the risks of something
> happening in the equipment, you have to look at the risks of something 
> happening
> in the
> system.  The designer of the equipment may well have been absolutely ignorant 
> of
> what uses the purchaser puts the equipment too.  The installer of the 
> equipment
> may be without any clue as too how well the building steel is bonded, etc., 
> etc.
> Therefore, although there is
> no way that anyone can or should guarantee absolute safety, the designer of 
> the
> terminal must assume worst case and very rare scenarios.
> 
> 
> Ciao,
> 
> 
> Vic 
> 
> 

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