I answer, begin talking, talk some more, ask if they hire business etiquette graduates since theres only silence, not even background noise .... they hang up, immediate busy signal = similar sounds to telemarketers past.
They are selling a service to Realtors. I indicated I was on the Do Not Call list. They said they would add me to their internal list. I said they need to check the federal list before dialing numbers. GRRR