"Phone demeanor" refers to the way someone behaves or carries themselves while speaking on the phone. It describes a person's attitude, tone of voice, and overall behavior during phone conversations. Full definition
Candidate must have strong communication skills, a professional phone demeanor, and strong attention to detail for this stay - at - home, contract position. (inc.com)
Must have strong customer service skills and a professional and pleasant phone demeanor. (simplyhired.com)