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Lenovo Staff
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My T61 (6457-6NG) is equipped with the WLAN card Intel(R) Wireless WiFi Link 4965AG. 


I am running Win XP Professional Service pack 3.


When detecting T61 via the Lenovo site it says:


ThinkPad T61 (6457-6NG)

T7300(2GHz), 1GB RAM, 80GB 5400rpm HD, 15.4in 1680x1050 LCD, 128MB nVIDIA Quadro NVS 140M, CDRW/DVD, Intel 802.11agn(n-disabled), Bluetooth, Modem, 1Gb Ethernet, UltraNav, Secure chip, Fingerprint reader, 6c Li-Ion, WinXP Pro.


Does anyone know whether it is it possible to enable it due to software / firmware upgrade or other kind of upgrade and how to do it?




It's not possible  to "unlock" the N-function. To achieve N-functionality, you need to swap the wifi-card with another, and (if you don't already have the third antenna) install a new set of antenna-cables.  Most T61 and later systems shipped with 3 antenae wires - black, grey and white.  The black and grey are used on 2 antenae connection cards with the white wire capped and tucked underneath the card.   By removing the keyboard, you can quickly determine whether your system as 2 or 3 wires present.   The blue and red wires (if also present) are for the WWAN function.


Note that if you don't get an approved card from IBM/Lenovo, your BIOS will throw an error (unless you run a modified BIOS without a whitelist present).

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