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OTUS(4)		       FreeBSD Kernel Interfaces Manual		       OTUS(4)

     otus -- Atheros USB IEEE 802.11a/b/g/n wireless network device

     otus* at uhub? port ?

     The otus driver supports USB 2.0 wireless network devices based on
     Atheros Communications AR9001U chipset.

     The AR9001U chipset is made of an AR9170 MAC/Baseband and an AR9101
     (1T2R), AR9102 (2T2R) or AR9104 (dual-band	2T2R) Radio.

     These are the modes the otus driver can operate in:

     BSS mode	    Also known as infrastructure mode, this is used when asso-
		    ciating with an access point, through which	all traffic
		    passes.  This mode is the default.

     monitor mode   In this mode the driver is able to receive packets without
		    associating	with an	access point.  This disables the in-
		    ternal receive filter and enables the card to capture
		    packets from networks which	it wouldn't normally have ac-
		    cess to, or	to scan	for access points.

     The otus driver can be configured to use Wired Equivalent Privacy (WEP)
     or	Wi-Fi Protected	Access (WPA1 and WPA2).	 WPA2 is the current encryp-
     tion standard for wireless	networks.  It is strongly recommended that
     neither WEP nor WPA1 are used as the sole mechanism to secure wireless
     communication, due	to serious weaknesses.	WPA1 is	disabled by default
     and may be	enabled	using the option "wpaprotos wpa1,wpa2".	 For standard
     WPA networks which	use pre-shared keys (PSK), keys	are configured using
     the "wpakey" option.  WPA-Enterprise networks require use of the wpa_sup-
     plicant package.  "wpaprotos wpa1,wpa2".  For standard WPA	networks which
     use pre-shared keys (PSK),	keys are configured using the "wpakey" option.
     WPA-Enterprise networks require use of the	wpa_supplicant package.

     The otus driver can be configured at runtime with ifconfig(8) or on boot
     with hostname.if(5).

     The driver	needs at least version 1.0 of the following firmware files,
     which are loaded when an interface	is attached:


     Although these firmware files are freely redistributable, their usage is
     restricted.  A prepackaged	version	of the firmware	can be installed using

     The following adapters should work:

	   3Com	3CRUSBN275
	   Arcadyan WN7512
	   CACE	AirPcap	Nx
	   D-Link DWA-130 rev D1
	   D-Link DWA-160 rev A1
	   D-Link DWA-160 rev A2
	   IO-Data WN-GDN/US2
	   NEC Aterm WL300NU-G
	   Netgear WNDA3100
	   Netgear WN111 v2
	   Planex GW-US300
	   SMC Networks	SMCWUSB-N2
	   TP-Link TL-WN821N v1, v2
	   Ubiquiti SR71 USB
	   Unex	DNUA-81
	   Z-Com UB81
	   Z-Com UB82
	   ZyXEL NWD-271N

     The following example scans for available networks:

	   # ifconfig otus0 scan

     The following hostname.if(5) example configures otus0 to join network
     "mynwid", using WPA key "mywpakey", obtaining an IP address using DHCP:

	   nwid	mynwid wpakey mywpakey

     otus0: error N, could not read firmware ...  For some reason, the driver
     was unable	to read	the microcode file from	the filesystem.	 The file
     might be missing or corrupted.

     otus0: device timeout  A frame dispatched to the hardware for transmis-
     sion did not complete in time.  The driver	will reset the hardware.  This
     should not	happen.

     arp(4), ifmedia(4), intro(4), netintro(4),	usb(4),	hostname.if(5),

     The otus driver first appeared in OpenBSD 4.6.

     The otus driver was written by Damien Bergamini
     <>	based on source	code licensed under the	ISC
     released in 2008 by Atheros Communications	for Linux.

     The AVM FRITZ!WLAN	USB Stick N adapter is currently not supported.

     The otus driver does not support any of the 802.11n capabilities offered
     by	the AR9001U chipset.  Additional work is required in ieee80211(9) be-
     fore those	features can be	supported.

     This driver does not support powersave mode.

FreeBSD	13.0		       November	10, 2019		  FreeBSD 13.0


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