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Manual Pages  — UMODEM

NAME

umodem – USB Communication Device Class serial (CDC ACM) driver

CONTENTS

SYNOPSIS

To compile this driver into the kernel, place the following lines in your kernel configuration file: device usb device ucom device umodem

Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5): 

umodem_load="YES"

DESCRIPTION

The umodem driver provides support for USB modems and serial devices that implement the Communication Device Class Abstract Control Model (CDC ACM). It also provides device-side CDC ACM support. Supported modems are basically standard serial line modems, but they are accessed via USB instead. They support a regular AT command set. The commands can either be multiplexed with the data stream or handled through separate pipes. In the latter case the AT commands have to be given on a device separate from the data device.

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

HARDWARE

Devices supported by the umodem driver include:

FILES

/dev/ttyU* for callin ports
/dev/ttyU*.init
/dev/ttyU*.lock
  corresponding callin initial-state and lock-state devices

/dev/cuaU* for callout ports
/dev/cuaU*.init
/dev/cuaU*.lock
  corresponding callout initial-state and lock-state devices

SEE ALSO

tty(4), ucom(4), usb(4)

HISTORY

The umodem driver appeared in NetBSD This manual page was adopted from NetBSD by Tom Rhodes <Mt trhodes@FreeBSD.org> in April 2002.

BUGS

Only modems with multiplexed commands and data are supported at the moment.
UMODEM (4) April 26, 2017
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