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CNW(4)			 BSD Kernel Interfaces Manual			CNW(4)

     cnw -- Netwave AirSurfer wireless network driver

     device cnw

     The cnw interface provides	access to a theoretical	1Mb/s wireless Ether-
     net network based on the Netwave AirSurfer	Wireless LAN (formerly known
     as	the Xircom Netwave Wireless LAN).

     Note that the driver does not support newer devices such as the Netwave
     AirSurfer "Plus", or the BayStack 650/660.	 These devices are supported
     by	the awi(4) driver.

     Netwave devices are not compatible	with IEEE 802.11 wireless networks.
     Also note that there are Netwave devices with different wireless fre-
     quency, depending on the radio band plan in each country.

     The card uses 36K of I/O memory mapped to the card.  You may need to in-
     crease memory space available to the PC Card controller.  See pccard(4)
     for details.

     In	use, the cards appear to achieve up to a 420Kb/s transfer rate,	though
     a transfer	rate between 250Kb/s and 350Kb/s is typical.

     The card operates in the 2.4GHz frequency range and is subject to inter-
     ference from microwaves, IEEE 802.11 wireless network devices, as well as
     earth.  For example, it seems that	IEEE 802.11 channel 14 conflicts with
     Netwave (US frequency).  They interfere with each other if	they are both
     operated in the same geographic region, causing weird packet loss.	 You
     may be able to avoid the interference with	IEEE 802.11 devices, by	chang-
     ing the IEEE 802.11 channel.

     Cards supported by	the cnw	driver include:

     o	 Xircom	CreditCard Netwave
     o	 NetWave AirSurfer

     cnw0: can't map memory  Indicates that the	driver was not able to allo-
     cate enough PC Card bus address space into	which to map the device.  See
     pccard(4) and increase memory available to	the PC Card controller.

     arp(4), awi(4), inet(4), intro(4),	pccard(4)

     The cnw driver was	ported from NetBSD by Hiroyuki Aizu
     <>.  It first appeared in NetBSD 1.4.  The	first FreeBSD
     release to	include	it was FreeBSD 5.0.  This manual page was adopted from
     NetBSD by Christian Brueffer <>.

BSD			       September 5, 2004			   BSD


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