The most important element in effective communication is active listening. To listen to someone is a requirement for responding, but it is usually taken for granted or looked upon as too much trouble. Sometimes a person does not listen at all but focuses on that person's responding answer. This lack of attention destroys the communication process.
The way a person responds informs the partner in the communication process that he/she is listening or not. He / She will know the quality of your listening, whether you are active about it or just hearing the sounds without registering the meaning.
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There are two ways of gathering information on the telephone: