tone dialling Meaning in Cambridge Business English Dictionary
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Meaning of "tone dialling" - Business English Dictionary

tone dialling

noun [U] UK ( US tone dialing)
 
 
COMMUNICATIONS
a system that uses a different electronic sound for each number to make a connection with the telephone line: Other features of this phone include electronic push buttons with tone dialling. →  Compare pulse dialling
(Definition of tone dialling from the Cambridge Business English Dictionary © Cambridge University Press)
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