When it became clear to our company that manual dialing of numbers takes too much time, I decided to look for information on automating this process. As a result, I came across a useful article https://www.mightycall.com/blog/how-to-set-up-predictive-dialer/ , which explains in detail how to properly set up a predictive dialer. There were many useful tips that helped us optimize the work of operators and increase the number of successful calls. This really changed the approach to calling and saved a lot of time.