Long pause when answering call before someone came on the line. Called this manufacturing plant looking for a production employee. Usually that means they're a debt collector. They called again 2 minutes later with a different caller id asking to verify employment. Usually means its a student loan collector.
They call almost every day but don't leave message. I don't know what is wrong with these people. If they were selling anything I sure wouldn't buy from them. Bother some one else please.