We have an Asterisk exchange at home, it supports a US number and a NZ number - we get maybe one spam call a year from either number ..... Why? .... because th

We have an Asterisk exchange at home, it supports a US number and a NZ number - we get maybe one spam call a year from either number ..... Why? .... because the home exchange answers every call and asks for a 1 digit extension number - that's enough to put off all those robo calls, the machines that call ahead for them treat this as an answering machine and move on. Back when the kids were still at home everyone had a 1 digit extension (and VM box), calls would ring in kids' bedrooms and then in the common space, everyone had their own ring cadence - my daughter got 90% of the phone calls so I gave her the short ring, we never had to answer the phone for her