Sales people often make lots of calls to secure sales visits. Cold calling(when no one knows you) can be demoralising for both the sales person and the potential customer. Start ups have to be particularly careful as potential customers don’t know anything about them.
To build trust start with engaging potential customers. Know who their potential customers are, where they are and why they will buy from you?. Creatively use of a range of resources like going to exhibitions, Linkedin, social media, blogging, engaging in conversations with potential customers. and tweeting.
Then the cold calls can be converted to hot calls which leads to sales.