> 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/umodem.4.md).

# umodem.4

`umodem` — USB 通信设备类串口（CDC ACM）驱动

## 名称

`umodem`

## 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 umodem

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
umodem_load="YES"
```

## 描述

`umodem` 驱动为实现通信设备类抽象控制模型（CDC ACM）的 USB 调制解调器和串口设备提供支持。它还提供设备端的 CDC ACM 支持。所支持的调制解调器基本上是标准串口线调制解调器，只是通过 USB 访问。它们支持常规 AT 命令集。命令可与数据流复用，也可通过独立管道处理。在后一种情况下，AT 命令必须在独立于数据设备的设备上发出。

该设备通过 [ucom(4)](/man/man4/ucom.4.md) 驱动访问，使其行为类似 [tty(4)](/man/man4/tty.4.md)。

## 硬件

`umodem` 驱动支持的设备包括：

* 3Com 5605
* Curitel PC5740 无线调制解调器
* Kyocera AH-K3001V 移动电话（WILLCOM）
* Kyocera WX320K 移动电话（WILLCOM）
* Metricom Ricochet GS USB 无线调制解调器
* Sierra MC5720 无线调制解调器
* Yamaha 宽带无线路由器 RTW65b
* ELSA MicroLink 56k USB 调制解调器
* Sony Ericsson W810i 手机
* Sonim XP5300 Force

## 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

`umodem` 驱动出现于 NetBSD 1.5。本手册页由 Tom Rhodes <trhodes@FreeBSD.org> 于 2002 年 4 月从 NetBSD 引入。

## 缺陷

目前仅支持命令与数据复用的调制解调器。


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