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AN(4)			    BSD Programmer's Manual			 AN(4)

NAME
     an - Aironet Communications 4500/4800 wireless network adapter driver

SYNOPSIS
     an0 at pcmcia?
     an0 at pnp?
     an0 at isa? port P irq N

DESCRIPTION
     The an driver provides support for Aironet Communications 4500 and 4800
     PC Card wireless network adapters.	 This includes the ISA, PCI and PCMCIA
     varieties.	 The 4500 series adapters operate at 1 and 2Mbps while the
     4800 series can operate at 1, 2, 5.5 and 11Mbps.  The ISA, PCI and PCMCIA
     devices are all based on the same core PCMCIA modules and all have the
     same programming interface, the ISA and PCI cards appear to the host as
     normal ISA and PCI devices and no not require any PCCARD support.

     When the ISA device is used it is recommended that it be set for Plug-n-
     Play mode.	 If pnp mode is not used the the kernel must be informed of
     the i/o port base and irq as set by the dip switches.  The possible port
     values P are 0x140, 0x180, 0x300 and 0x340.  The possible IRQ values N
     are 5, 7, 9, 10, 11, 12, 14 and 15.

     All host/device interaction with the Aironet cards is via programmed I/O.
     The Aironet devices support 802.11 and 802.3 frames, power management,
     BSS (infrastructure) and IBSS (ad-hoc) operation modes. The an driver en-
     capsulates all IP and ARP traffic as 802.11 frames, however it can re-
     ceive either 802.11 or 802.3 frames. Transmit speed is selectable between
     1Mbps, 2Mbps, 5.5Mbps, 11Mbps or "auto" (the NIC automatically chooses
     the best speed).

     By default, the an driver configures the Aironet card for infrastructure
     operation with no SSID.  The driver may be put into ad-hoc mode via the
     ifconfig(8) utility.

     For more information on configuring this device, see ifconfig(8) and
     ancontrol(8).

DIAGNOSTICS
     an%d: init failed	The Aironet card failed to come ready after an ini-
     tialization command was issued.

     an%d: failed to allocate %d bytes on NIC  The driver was unable to allo-
     cate memory for transmit frames in the NIC's on-board RAM.

     an%d: device timeout  The Aironet card failed to generate an interrupt to
     acknowledge a transmit command.

SEE ALSO
     arp(4),  netintro(4),  ifconfig(8),  ancontrol(8)

HISTORY
     The an device driver first appeared in FreeBSD 3.0.  It was extensively
     modified for use in BSD/OS, first appearing in 4.2 release.

AUTHOR
     The an driver was written by Bill Paul <wpaul@ee.columbia.edu>.
     It was modified for use in BSD/OS by Paul Borman <prb@bsdi.com>.

				 June 22, 2000				     1
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