Calls then hangs up when answering machine kicks in. I am on the Nat'l Do Not Call list so all marketing calls coming to this house are illegal and if they are ignoring federal laws you can bet they are scam artists. Recommendation to all: 1) Google The National do not call list 2) take 2 minutes and sign up 3) After 30 days you can report them. It eventually works. Actually had the feds call asking me if I was willing testify in court about phone harassment.