Dual-Tone
Multi-Frequency (DTMF) Codes

DTMF, or dual-tone multi-frequency is the sound you hear when you dial different numbers on your phone. This generates a code that is used to signal the user’s intended action when the different numbers are dialled in combinations.

Other than calling people, when you are on a call you can dial different DTMF short codes to trigger different actions. Below is a list of DTMF codes that you can use on your phone.


NOTE: DTMF codes work with physical hardware and with virtual devices (Softphone App, UC Desktop App, MS Team Dialpad).

DTMF Codes

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