Today, we can use our cellphones to communicate with just about anyone, anytime, anywhere. But that doesn’t mean we should use our phones wherever, whenever, and however. There is still a time and place for when and how to use a phone in a professional setting.

Career coach Barbara Pachter outlines modern phone etiquette rules in her book The Essentials of Business Etiquette. Here are the most important points you need to know:

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Vivian Giang contributed to this story. This article originally appeared on Business Insider

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