We found one dictionary that defines the word dual-tone multi-frequency signaling:

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1. Dual-tone multi-frequency signaling: Wikipedia, the Free Encyclopedia

▸ Words similar to dual-tone multi-frequency signaling ▸ Usage examples for dual-tone multi-frequency signaling ▸ Idioms related to dual-tone multi-frequency signaling ▸ Wikipedia articles (New!) ▸ Words that often appear near dual-tone multi-frequency signaling ▸ Rhymes of dual-tone multi-frequency signaling ▸ Invented words related to dual-tone multi-frequency signaling