"Ken Blake" wrote

| If you have an answering machine (where you can listen to new calls to
| screen them by waiting for someone to start leaving a message and then
| pick up the handset if you want to talk to them), you could add the
| "service disconnected" tone to the beginning of your outgoing voicemail
| message.
|
|
| I recommend that instead you use the free NoMoRoBo
| (https://www.nomorobo.com/). It works very well.

He seems to be talking about a landline, which is
what many of us are using. Nomorobo characterizes
VOIP as a landline, but they're of no use for an
actual landline.