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


     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



     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).


     Devices supported by the umodem driver include:

        3Com 5605
        Curitel PC5740 Wireless Modem
        Kyocera AH-K3001V Mobile Phone(WILLCOM)
        Kyocera WX320K Mobile Phone(WILLCOM)
        Metricom Ricochet GS USB wireless modem
        Sierra MC5720 Wireless Modem
        Yamaha Broadband Wireless Router RTW65b
        ELSA MicroLink 56k USB modem
        Sony Ericsson W810i phone
        Sonim XP5300 Force


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

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


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


     The umodem driver appeared in NetBSD 1.5.  This manual page was adopted from NetBSD by Tom
     Rhodes <> in April 2002.


     Only modems with multiplexed commands and data are supported at the moment.