5Ghz Wireless

I have a Lenovo T530 and have the following wireless card:

1x1 11b/g/n Wireless LAN PCI Express Half Mini Card Adapter

It used to work with 5GHz but not, I am not able to connect to it.  I am not sure what happened.

Does anyone know how I can get to 5GHz again?

Thanks  -LN
LateNaiteCEO and FounderAsked:
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epichero22Commented:
Can any other device connect to your 5GHz network?  Is it still visible?  

I personally avoid 5GHz since it's not as resilient as 2.4.  If you can, try connecting to that instead.
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Craig BeckCommented:
A b/g/n card doesn't say to me that it works at 5GHz - only 2.4GHz.

Are you sure you're not confusing 802.11n to mean 5GHz?
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Craig BeckCommented:
I just had a quick look at the tech specs for that laptop.  It doesn't list a 1x1 WLAN NIC...

WiFi      
Intel Centrino Wireless - N2200 (2x2 BGN)
Intel Centrino Advanced - N6205 (2x2 AGN)
Intel Centrino Ultimate - N6300 (3x3 AGN)

Do you know exactly which card you have in the laptop?
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LateNaiteCEO and FounderAuthor Commented:
So the wireless card that I have is a 1x1 11b/g/n Wireless LAN PCI Express Half Mini Card Adapter.  B/G/N card says that it should support both 2.4 and 5Ghz?  (the N )..

I purchased the laptop custom built.  

Well, I sometime support networks that run on 2.4 GHz and 5GHz so it would be nice to be able to run/test on the 5GHz range sometimes.
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Craig BeckCommented:
N is not 5GHz.  It is MIMO at 2.4GHz on that card.

N is an extension of the band and can work at 2.4GHz or 5GHz, but if the card isn't A capable it doesn't work on the 5GHz band.
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LateNaiteCEO and FounderAuthor Commented:
Ok, it used to work.  So I am curious how to get it back.  Not sure how it got disabled before.
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Craig BeckCommented:
It's probably disabled by the driver.  In Windows, go to device manager and check the Advanced tab in the device.  There will be an option there to set the wireless mode, or similar.  It may be set to 802.11b/ or 802.11b/g.

I'm still curious too though.  You didn't answer my question so I wonder if you were just connecting using 802.11n and assumed that to mean 5GHz?
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LateNaiteCEO and FounderAuthor Commented:
Ok, my wireless card is set at 802.11b/g/n and 802.11n is able to connect at 2.4 or 5 GHz.  

Hmm.  I remember seeing the 5GHz band SSID at my previous connection and was able to connect to it.  I don't have a 5GHz SSID to test right now.

We might have to table it but I know that the 5GHZ SSID was not visible on my laptop and others were able to connect.  I never dealt with it at the point.

thanks all - I'll see if I can test with some Access Points configured at 5GHz this weekend.
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Craig BeckCommented:
Like I said, if a card only says b/g/n I'd assume it doesn't support 5GHz.  For a card to support 5GHz I'd be looking for the description to include the letter a.  So IMO a card that says 802.11b/g/n only does 2.4GHz while a card that says 802.11a/b/g/n does both 2.4GHz and 5GHz.  These are standards, so any description should adhere to those.  If the driver for the NIC doesn't offer an 802.11a only mode I'd say it's not 5GHz capable.
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LateNaiteCEO and FounderAuthor Commented:
But according the this:

N is an extension of the band and can work at 2.4GHz or 5GHz,..it should be supported?
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Craig BeckCommented:
No.  N is an extension of the band, but the card first has to support the frequency band.

A card can be single-band or dual-band.  Just because it supports 802.11n doesn't mean that it is dual-band.  802.11n simply means that MIMO is supported on whichever band(s) the card supports.
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LateNaiteCEO and FounderAuthor Commented:
Ok, I am still puzzled as to how I was able to connect (or even see the 5GHz SSID before).
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LateNaiteCEO and FounderAuthor Commented:
I can't really test this for now unless I have a 5GHz. but thanks for the suggestion.
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