Final answer:
A pleasing telephone voice is developed by using clarity, professional jargon, and customer service.
Step-by-step explanation:
A pleasing telephone voice is developed by using clarity, professional jargon, and engaging in customer service. When speaking on the phone, it is important to enunciate clearly and use respectful language to ensure that the other person understands you.
Professional jargon can also help convey expertise and professionalism. Additionally, providing excellent customer service by being friendly and helpful can contribute to a pleasing telephone voice.