Intel PRO/Wireless LAN 2100 3B Mini PCI Adapter

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This is a Mini-PCI WiFi Adapter that is installed in a Mini-PCI slot.


  • Chipset: Intel 2100
  • IEEE Standards: 802.11b
  • PCI ID: 8086:1043

Mini-PCI WiFi Adapter

IBM Partnumbers

IBM Option PN: 31P8601
IBM FRU PN: 91P7143, 91P7267
IBM FRU PN (WW): 91P7293
IBM FRU PN (G40/G41): 91P7261, 26P8421

Only the IBM Parts will work, any other parts will give an 1802 error on Post because the sub-vendor PCI ID is different, see Problem with unauthorized MiniPCI network card for more details and solutions.

Also known (in IBM literature) as....

  • 802.11b Wireless Card
  • 802.11b Wireless Card (Calexico-b)
  • High Rate Wireless LAN Mini-PCI Adapter III
  • 802.11b Actiontec Wireless Card
  • 802.11b Actiontec Wireless Card (Braxton)

Linux WiFi driver

This adapter works with the ipw2100 driver.

ThinkPads this card may be found in

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