On May 20, 1:37 pm, "Dave Plowman (News)"
wrote:
So they don't use balanced lines?
...
Right. So they're not actually earthed, then? You should have made that
clear. What happens in a fault condition is something else.

How earthing is accomplished was plainly stated and easily read in
that first post:
Protection is about earthing every wire to the same earth
ground. Either a wire connects directly to earth OR a
surge protector makes that earthing connection.
How could you not understand that? Amazing how one knows, but never
bothers to learn or read the science.

Also bluntly stated was that telephone lines are balanced lines
while each wire makes a connection to earth ground. Why is that so
difficult? If you still don't know what a protector does - if you are
still listening to popular myths that promote ineffective protectors -
then how earthed phone lines (via protectors) remain balanced would
confuse you. Those myths can only survive if you ignore details –
such as ignoring what was in the first post.

Posted were concepts that have been standard protection without
damage for over 100 years. A superior solution that also costs less
money. A protector is only as effective as its earth ground, so that
(thousands of volts) protection inside routers and NICs is not
overwhelmed. That single point earth ground provides protection.
Provided were examples of effective protectors to make that connection
from each ethernet wire to earth – to do what BT also does in every
telco switching station.