---
name: "umct"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["linux", "freebsd", "openbsd"]
url: "https://new.carta.tech/umct"
---

# umct(4)

MCT USB-RS232 USB serial adapter

## NAME

**umct** – MCT USB-RS232 USB serial adapter

## SYNOPSIS

**umct\*  at uhub?** **ucom\*  at umct?**

## DESCRIPTION

The **umct** driver provides support for MCT USB-to-RS232 Converter and their family products.

The device is accessed through the [ucom(4)](/ucom/4.md) driver which makes it behave like a [tty(4)](/tty/4.md).

## HARDWARE

The **umct** driver supports the following adapters:

- Belkin F5U109

  - Belkin F5U409

  - D-Link DU-H3SP USB BAY

  - MCT USB-RS232 Converter 9 pin Model U232-P9

  - MCT USB-RS232 Converter 25 pin Model U232-P25

  - Sitecom USB-RS232 Converter

  ## SEE ALSO

[tty(4)](/tty/4.md), [ucom(4)](/ucom/4.md), uhub(4), [usb(4)](/usb/4.md)

## HISTORY

The **umct** driver appeared in OpenBSD 3.2.