# modem-on macro

The modem-on macro invokes the xonoff command and passes it an n option.
This enables x-on/x-off on the current line or a given line.

## See also

- [modem-off macro](https://d3codex.com/tcl/modem-off-macro/)
- [Port number](https://d3codex.com/definitions/port-number/)
- [xonoff command](https://d3codex.com/tcl/xonoff-command/)

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Source: https://d3codex.com/tcl/modem-on-macro/ - part of the D3Codex reference.