So we waited some more, until somebody ran a splicer out to Jeff. Whereupon he went off and spliced something, and discovered that splicing the something did not fix the problem. So he called in and spent several minutes in Verizon AVR menu hell until he could get through to a real person, who did something or another in the back office, which eventually led to my service being restored. Which is a Happy Thing for me.
OTOH, I was down for nearly twenty hours, due to some failure in Verizon equipment somewhere. And Verizon's customer "service" organization managed to make promises to me that it couldn't keep, regarding repair time.
Ah, the wonders of modern telephony. Wasn't competition supposed to improve things?