During telephone communication, tone of voice is more important than the words used. This is because tone of voice conveys emotions, attitudes, and intentions, which can greatly impact the overall meaning and interpretation of the conversation. The tone of voice can help establish rapport, convey empathy, and ensure effective communication. Even if the words used are appropriate, if the tone of voice is harsh or disinterested, it can lead to misunderstandings and a breakdown in communication. Therefore, having a pleasant and appropriate tone of voice is crucial for successful telephone communication.