English ⇄ Arabic Basque Bulgarian Catalan Chinese Chinese Taiwan Chinese simplified Croatian Czech Dutch English Esperanto Estonian Finnish French German Greek Hebrew Hindi Hungarian Italian Japanese Korean Latvian Lithuanian Norwegian Bokmål Polish Portuguese Romanian Russian Serbian Latin Slovak Slovene Spanish Swedish Turkish Ukrainian

dual-tone multiple-frequency
comp., MS	Dual Tone Multiple-Frequency (The signaling system used in telephones with touchtone keypads, in which each digit is associated with two specific frequencies)
Dual-Tone Multiple-Frequency
abbr., scottish	DTMF

dual: 1 phrase in 1 subject

Abbreviation

1