How to abbreviate Call Progress Tone?

The ways to abbreviate Call Progress Tone.

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CPT:
Call Progress Tone(Telecommunications, Telecom, Technology)
For more, try CALL PROGRESS TONE on ALL ACRONYMS DICTIONARY
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APASmart Define. (2018). call progress tone. Retrieved September 22, 2026, from http://smartdefine.org/call_progress_tone/abbreviations/a
ChicagoSmart Define. 2018. "call progress tone" http://smartdefine.org/call_progress_tone/abbreviations/a (accessed September 22, 2026).
HarvardSmart Define 2018, call progress tone, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/call_progress_tone/abbreviations/a>.
MLASmart Define. "call progress tone" 30 January 2018. Web. 22 September 2026. <http://smartdefine.org/call_progress_tone/abbreviations/a>