unixdev.net


Switch to SpeakEasy.net DSL

The Modular Manual Browser

Home Page
Manual: (NetBSD-6.1.5)
Page:
Section:
Apropos / Subsearch:
optional field

CNW(4)                     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 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
     frequency, 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)

NetBSD 6.1.5                    January 5, 1997                   NetBSD 6.1.5