DTMF (Dual Tone Multi-Frequency Signal) Transmission

This function is used when transmitting DTMF via the user's voice. The receiver of a DTMF transmission is generally a home telephone answering machine or a company's automated guidance call centre (When you send tone signals back according to the voice guidance recording).

  1. Press the talk button with a short press.

  2. Say: [Beep] “XXXX... send” (Say DTMF code)

  3. Prompt:“Sending XXXX... (DTMF code)”

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