These days for some reason the only people that call me for sales are minions of my mortgage company trying to get me to refinance.
A few years ago when the harassment level was higher I went on a futile quest to find a device or service that would:
a) answer the phone immediately.
b) say “if this is a personal call please press 1”
c) ring the phone if the person pressed 1, else hang up in 5 seconds.
However, this rather primitive tech was impossible to find in a consumer or office product, much less in an AIN service, and the IN group at Verizon wasn’t interested in implementing it either. I imagine I’d need an asterisk or a nuance server with a telephony line card or something like that to implement it today, but it should be fairly simple with that rather excessive level of investment.