## on
tdmf()

Register a handler that fires whenever the **caller** presses a DTMF digit (0–9, *, #, A–D) on their keypad.

**Caller keypresses only.** `on_dtmf` fires for digits pressed by the caller. To enable the agent itself to send DTMF tones (e.g. to navigate an IVR system it has called into), use `call.set_agent_dtmf(enabled=True)` instead.

The `DTMFPressedEvent` is a pydantic model imported from `guava.events`:

```
from guava.events import DTMFPressedEvent

class DTMFPressedEvent(BaseEvent):
    event_type: Literal["dtmf"] = "dtmf"
    digit: Literal["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "*", "#", "A", "B", "C", "D"]
```

### Signature

PythonTypeScript

```
@agent.on_dtmf
def on_dtmf(call: guava.Call, event: DTMFPressedEvent) -> None:
    ...
```

| Parameter | Type | Default | Description |
| --- | --- | --- | --- |
| call | Call | — | The active call object. |
| event | DTMFPressedEvent | — | Contains `digit` (string): the key the caller pressed — one of "0"–"9", "*", "#", "A", "B", "C", or "D". |

**Return value:** `None`