RogerT wrote:

You may have already done this, but the NID has two sections --
one for the owner access, and one for the phone company access.
When you open the owner side of the NID, you should be able to
unplug all of the plugs and plug a telephone directly in there
to see if you get a dial tone.

I'm sure there is still a large variety of telco wiring and demarcation
/ connection methods / connectors / jacks / terminal blocks still in
place all across US / Canada.

You can't say or assume that any given house has had their demarc
updated to reflect the current practice used today for new home hookup.