1.\" $OpenBSD: umodem.4,v 1.8 2008/06/26 05:42:07 ray Exp $ 2.\" $NetBSD: umodem.4,v 1.4 2000/01/25 08:32:05 augustss Exp $ 3.\" 4.\" Copyright (c) 1999 The NetBSD Foundation, Inc. 5.\" All rights reserved. 6.\" 7.\" This code is derived from software contributed to The NetBSD Foundation 8.\" by Lennart Augustsson. 9.\" 10.\" Redistribution and use in source and binary forms, with or without 11.\" modification, are permitted provided that the following conditions 12.\" are met: 13.\" 1. Redistributions of source code must retain the above copyright 14.\" notice, this list of conditions and the following disclaimer. 15.\" 2. Redistributions in binary form must reproduce the above copyright 16.\" notice, this list of conditions and the following disclaimer in the 17.\" documentation and/or other materials provided with the distribution. 18.\" 19.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29.\" POSSIBILITY OF SUCH DAMAGE. 30.\" 31.Dd $Mdocdate: June 26 2008 $ 32.Dt UMODEM 4 33.Os 34.Sh NAME 35.Nm umodem 36.Nd USB modem support 37.Sh SYNOPSIS 38.Cd "umodem* at uhub?" 39.Cd "ucom* at umodem?" 40.Sh DESCRIPTION 41The 42.Nm 43driver provides support for USB modems in the Communication 44Device Class using the Abstract Control Model. 45These modems are basically standard serial line modems, but they are 46accessed via USB instead. 47They support a regular AT command set. 48The commands can either be multiplexed with the data stream 49or handled through separate pipes. 50In the latter case the AT commands have to be given on a device separate 51from the data device. 52.Pp 53The device is accessed through the 54.Xr ucom 4 55driver which makes it behave like a 56.Xr tty 4 . 57.Sh SEE ALSO 58.Xr tty 4 , 59.Xr ucom 4 , 60.Xr uhub 4 , 61.Xr usb 4 62.Sh HISTORY 63The 64.Nm 65driver appeared in 66.Nx 1.5 . 67.Ox 68support was added in 69.Ox 2.7 . 70.Sh BUGS 71Only modems with multiplexed commands and data are supported 72at the moment. 73