.\" $OpenBSD: ucom.4,v 1.26 2009/11/07 05:17:50 deraadt Exp $
.\" $NetBSD: ucom.4,v 1.3 2000/04/14 14:55:18 augustss Exp $
.\"
.\" Copyright (c) 1999 The NetBSD Foundation, Inc.
.\" All rights reserved.
.\"
.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Lennart Augustsson.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
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.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
.\" PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\"
.Dd $Mdocdate: November 7 2009 $
.Dt UCOM 4
.Os
.Sh NAME
.Nm ucom
.Nd USB tty support
.Sh SYNOPSIS
.Cd "ucom* at moscom?"	# MosChip Semiconductor MCS7703
.Cd "ucom* at uark?"	# Arkmicro Technologie
.Cd "ucom* at ubsa?"	# Belkin
.Cd "ucom* at uchcom?"	# WinChipHead CH341/340
.Cd "ucom* at ucycom?"	# Cypress
.Cd "ucom* at uftdi?"	# FTDI
.Cd "ucom* at uipaq?"	# iPAQ
.Cd "ucom* at umct?"	# MCT
.Cd "ucom* at umodem?"	# Standardized umodem
.Cd "ucom* at umsm?"	# Qualcomm MSM
.Cd "ucom* at uplcom?"	# Prolific PL-2303
.Cd "ucom* at uslcom?"	# Silicon Laboratories CP2101/CP2102
.Cd "ucom* at uticom?"	# Texas Instruments TUSB3410
.Cd "ucom* at uvisor?"	# Handspring Visor
.Cd "ucom* at uvscom?"	# SUNTAC Slipper U VS-10U
.Sh DESCRIPTION
The
.Nm
driver attaches to USB modems, serial ports, and other devices that need
to look like a tty.
The
.Nm
driver behaves like a
.Xr tty 4 :
this means that normal programs such as
.Xr tip 1
or
.Xr pppd 8
can be used to access the device.
.Pp
The
.Va portno
locator can be used to decide which port to use for devices that have
multiple external ports.
.Sh FILES
.Bl -tag -width "/dev/ttyU?XX" -compact
.It Pa /dev/ttyU?
tty devices
.It Pa /dev/cuaU?
call out devices (see
.Xr tty 4 )
.El
.Sh SEE ALSO
.Xr intro 4 ,
.Xr tty 4 ,
.Xr usb 4
.Sh HISTORY
The
.Nm
driver appeared in
.Nx 1.5 .
.Ox
support was added in
.Ox 2.7 .