On 8/25/2018 7:10 AM, Mike S wrote:

Fortunately I can tether my machine to my smartphone to post this.

Do you have phone service on that phone line? If not it may be a 'dry
loop', in which case I'd expect you'd see a lot less DC, if any.

"A dry loop is an unconditioned leased pair of telephone line from a
telephone company. The pair does not provide dial tone or battery
(continuous electric potential), as opposed to a wet pair, a line
usually without dial tone but with battery."

https://en.wikipedia.org/wiki/Dry_loop

I do not have a land line so suspect this is not a dry loop, thank you