The Asterisk sign * is usually placed in the upper left or right corner of the relevant words and sentences as a symbol to divide different parts of the article. When used in groups, it occupies a single line. In the computer, because the multiplication sign “×” is easily confused with the letter X, we use * instead of the multiplication sign.
The Asterisk key in the telephone key is generally the pause key, and the basic pulse key telephone is mostly attached with this “*” key. If the subscriber can’t get through the outside line, use the “*” key. When he hears the dialing tone (secondary dialing tone) of the public network, he can release it. Only in this way can the public network automatic exchange operate correctly. If you just use the “#” key instead of pressing the “*” key to pause, in case the dial tone of the public network switch is slow, incorrect action will occur.