.\" $OpenBSD: ucom.4,v 1.31 2015/09/23 08:53:16 sobrado 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.
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.\" modification, are permitted provided that the following conditions
.\" are met:
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.Dd $Mdocdate: September 23 2015 $
.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 Technologies
.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 umcs?"	# MosChip Semiconductor multiport
.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 uscom?"	# simple USB serial adapters
.Cd "ucom* at uslcom?"	# Silicon Laboratories CP2101/CP2102
.Cd "ucom* at uslhcom?"	# Silicon Laboratories CP2110
.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 cu 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 .