Mastering the Phone Interview
http://career-advice.monster.com/job-interview-practice/Mastering-the-Phone-Interview/home.aspx

Vogt, Peter
Monster.com
2007

Abstract:

Many companies use phone interviews as an initial employment screening technique for a variety of reasons. Because they're generally brief, phone interviews save companies time. They also serve as a more realistic screening alternative for cases in which companies are considering out-of-town (or out-of-state and foreign) candidates. So the chances are pretty good that, at some point in your job hunt, you'll be asked to participate in a 20- to 30-minute phone interview with either one person or several people on the other end of the line.