For techies, Asterisk is your friend. During voting season, I enable a 3 digit voice captcha script so that all callers have to listen and then enter a 3 digit

For techies, Asterisk is your friend. During voting season, I enable a 3 digit voice captcha script so that all callers have to listen and then enter a 3 digit code to get my phone to ring. It's very effective at cutting out robocalls.