Answering machine answered, they played a couple seconds of music then line disconnected.

Caller ID shows Sanderson Research, they called at least one a day for over a week.

Caller id, listed Sanderson Research, when I answered and told them I was not interested the man got biligerant with me and when I asked to be placed on the DNC list he hung up on me. I tried calling back, the circut didn't complete, just a fast busy signal.