In article ,
Bob wrote:

The "ring" conductor should have -48-52VDC-to-ground on it. You'll
notice I said NEGATIVE 48VDC. Everything in the C.O. battery room
is labeled as NEGATIVE. You tell me. sigh

Corrosion and oxidation are less likely to occur on lines that are
negative to ground than positive. Hence, outside telephone plant is
positive ground.

Thank-you. It's probably basic electricity but I don't recall ever knowing
that.

What in incredibly OLD technology. What other, equally old technology do we
use so massively, on a continuous basis? Electricity? The internal
combustion engine?
--

JR

Where are ya, Ma, when
we really need ya?