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1. Hardware
hi
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6. Linux
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10. UNIX for Advanced & Expert Users
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CNW(4) BSD Kernel Interfaces Manual CNW(4)
NAME
cnw -- Netwave AirSurfer wireless network driver
SYNOPSIS
cnw* at pcmcia? function ?
DESCRIPTION
The cnw interface provides access to a theoretical 1 Mb/s wireless Ethernet 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 sup-
ported 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 increase memory space available to the PCMCIA controller. See pcmcia(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 interference 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 changing the IEEE 802.11 channel.
HARDWARE
Cards supported by the cnw driver include:
Xircom CreditCard Netwave
NetWave AirSurfer
DIAGNOSTICS
cnw0: can't map memory Indicates that the driver was not able to allocate enough PCMCIA bus address space into which to map the device. See
pcmcia(4) and increase memory available to the PCMCIA controller.
SEE ALSO
arp(4), awi(4), inet(4), intro(4), pcmcia(4), cnwctl(8)
BSD
January 5, 1997 BSD
