T420 - wifi issues

[JPH]

Hi all

Been searching for an answer to my woes but couldn't. I have a T420 (4177-CTO) that came with the Intel Wifi Link 1000 wifi adapter and although wifi N is enabled it is connecting to my routers at only 54Mbps. All my routers are 300Mbps N. And even older laptops T400/T61 are connecting at full speed. Have updated the driver but I am still stuck on 54Mbps with the T420. My x220 with its 6205 is always connecting at full 300Mbps without fail - both at home and in the office.

Any idea anyone?

[killer]

This is quite a straightforward problem to fix. Make sure your wireless settings are for WPA2-PSK and AES.
Once you have set this up, and you are connected via an 'N' router, your wireless connection will exceed 54 Mbps.

[JPH]

Hi, thanks for the tip, but all my access points /routers are WPA2-PSK.

But I managed to sort out half the problem differently: I deleted the wireless network settings that were saved and reconnected and then retyped the passkeys. Amazingly the T420 is now connected to either of my home routers at 300Mbps. So I will now try that again in the office tomorrow and see if that works there too.

But for the life of me I cannot see a logical explanation to what I did...

[killer]

It is the AES setting that is the important one. This is a choice in your Access Connections wireless settings. If it is set as anything other than AES you will be unable to exceed 54Mbps.

Anyway, I am really pleased it worked for you. It took me a while to sort it out when I first used 'N' wireless.

[herbk]

my t420 came with the standard b/g/n card is there anyway to install the centrino 6205 card? I now understand that the FRU # of that card is 60Y3253. However the question remains, will it work if I get one?