> For the complete documentation index, see [llms.txt](https://book.bsdcn.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://book.bsdcn.org/man/man4/umct.4.md).

# umct.4

`umct` — Magic Control Technology USB-RS232 转换器驱动

## 名称

`umct`

## 概要

要将此驱动编译进内核，请将以下行加入你的内核配置文件：

> device usb device ucom device umct

或者，要在引导时以模块方式加载该驱动，请将以下行加入 loader.conf(5)：

```sh
umct_load="YES"
```

## 描述

`umct` 驱动为基于 Magic Control Technology USB-232 设计的 USB 转 RS-232 转换器提供支持。这些设备支持大多数标准 RS-232 特性，包括 300 到 115200 比特每秒的波特率。但似乎既不支持硬件流控制，也不支持软件流控制。

此驱动下对设备的访问通过 [ucom(4)](/man/man4/ucom.4.md) 框架和设备节点进行。

## 硬件

`umct` 驱动支持以下适配器：

* Belkin F5U109
* Belkin F5U409
* D-Link DU-H3SP USB BAY 集线器
* Magic Control Technology USB-232
* Sitecom USB-232

## 文件

**`/dev/ttyU*`** 用于呼入端口 **`/dev/ttyU*.init`** **`/dev/ttyU*.lock`** 对应的呼入初始状态和锁定状态设备 **`/dev/cuaU*`** 用于呼出端口 **`/dev/cuaU*.init`** **`/dev/cuaU*.lock`** 对应的呼出初始状态和锁定状态设备

## 参见

[tty(4)](/man/man4/tty.4.md), [ucom(4)](/man/man4/ucom.4.md), [usb(4)](/man/man4/usb.4.md)

## 历史

`umct` 驱动出现于 FreeBSD 5.2。它大致基于 Alexander Kabaev <kan@FreeBSD.org> 编写的 [ubsa(4)](/man/man4/ubsa.4.md) 驱动，文档由 Wolfgang Grandeggar <wolfgang@cec.ch> 提供。

## 作者

`umct` 驱动由 Scott Long <scottl@FreeBSD.org> 编写。


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