It's really too hard to say. I've really not seen too many people have success with hiring telemarketers or employee's for cold-calling, it could be that they are calling from a "residence" and not the actual company they are representing.. that would sort of turn me off too if I received a call from a residential phone OR even unknown caller, I just wouldn't find it very credible. JMO It's always been my success that I know my company, my services and my business so I sell it and me.