"Cold callers" refers to individuals or companies who make unsolicited phone calls to try and sell products or services to people who were not expecting or requesting such calls. Full definition
For example, you might set up a program for a top cold caller by rewarding them in cash for each new sale they add every month to their running total. (ondeck.com)
According to research by Huthwaite, 91 percent of B2B buyers never respond to an unsolicited inquiry, and 88 percent will have nothing to do with cold callers. (ironpaper.com)
The main problem of unsuccessful cold callers is that they give up far too easily and quickly. (entrepreneur.com)