How to abbreviate Dial Tone First?

The ways to abbreviate Dial Tone First.

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DTF:
Dial Tone First(Telecommunications, Telecom, Technology)
For more, try DIAL TONE FIRST on ALL ACRONYMS DICTIONARY
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APASmart Define. (2018). dial tone first. Retrieved September 28, 2026, from http://smartdefine.org/dial_tone_first/abbreviations/a/telecommunications
ChicagoSmart Define. 2018. "dial tone first" http://smartdefine.org/dial_tone_first/abbreviations/a/telecommunications (accessed September 28, 2026).
HarvardSmart Define 2018, dial tone first, Smart Define, viewed 28 September, 2026, <http://smartdefine.org/dial_tone_first/abbreviations/a/telecommunications>.
MLASmart Define. "dial tone first" 30 January 2018. Web. 28 September 2026. <http://smartdefine.org/dial_tone_first/abbreviations/a/telecommunications>