I finally had to call Verizon due to so much noise on our copper line that it was impossible to have a phone conversation. I was promptly told that my line would be replaced with a fiber optic line.
Fearing the worst, I searched for FIOS on CRPF and found that the fiber optic wasn't the end of the world! So today, Verizon removed my old NIB and installed a ONT, power supply, and gave me a backup battery holder and a dozen D cells.
I'm happy to report the only problem was finding the the buried vault in the woods that serves my house. It was buried under about a foot of leaves and dirt. They had to call someone with a locater to find it. After that, it all went well. All my rotary phones ring and dial out!
The techs who came out got a kick out of all my old phones, and they even tried to find a key to open the upper housing on my payphone. No luck, though.