Wiktionary
dial tones
n. (plural of dial tone English)
Usage examples of "dial tones".
Now they were all picking up phones, lifting every receiver in sight, but they heard only dial tones.
He could just hear the dial tones, four of one digit, one of another, two of a third.
She started to slam it down, then caught herself and cautiously pressed the button again-feeling as if she had only a few dial tones left and didn't want to waste them.