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Meaning of dual tone multi-frequency | Babel Free

Noun CEFR C1

Definitions

Synonym of touch-tone dialing.

uncountable

CEFR level

C1

Advanced
This word is part of the CEFR C1 vocabulary — advanced level.

See also

dual-capable aircraft dual-clutch gearbox dual-coding theory dual-edged sword dual-energy X-ray absorptiometry dual-sector model