# dtr-off command

The dtr-off macro turns off data terminal
ready.

**For Windows:**Not Supported

If the port is
not specified, the current port is used.

## Syntax

```
dtr-off {port.number}
```

## See also

- [Port number](https://d3codex.com/definitions/port-number/)

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Source: https://d3codex.com/tcl/dtr-off-command/ - part of the D3Codex reference.