( NAmE ˈtone dialing ) noun
[ U ] a method of calling telephone numbers in which each number is sent as a combination of tones
( NAmE ˈtone dialing ) noun
[ U ] a method of calling telephone numbers in which each number is sent as a combination of tones
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005