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802.11n minipci advice

T60/T61 series specific matters only
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chamelion
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Location: london, UK

802.11n minipci advice

#1 Post by chamelion » Mon Jun 15, 2009 6:03 pm

hey guys,

i already have the patched bios (from http://forum.thinkpads.com/viewtopic.php?f=29&t=55837) which has allowed me to replace my 802.11b/g card with a intel 4965AGN card.

Problem is that it's single band. I was wondering whether this:
http://cgi.ebay.co.uk/APPLE%1A%1ABroadc ... 5001r30222

would work with my T60? I'm guessing yes cause I already have the patched bios, but am I overlooking anything? it'd be nice to have the dual band functionality (by dual band it means 2.4-5ghz, right?)

What about being able to use "wide" channels, what do i need for that? i'm being told that to optimize speed from a linksys wrt320N i need to be running at 40mhz b/w and 5ghz frequency. is the card on ebay capable of this?

thanks for any help in advance!

bill bolton
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Re: 802.11n minipci advice

#2 Post by bill bolton » Mon Jun 15, 2009 9:02 pm

chamelion wrote:replace my 802.11b/g card with a intel 4965AGN card.

Problem is that it's single band.
The Intel 4965AGN is a dual band card, that is fully 802.11n Draft 2 compliant.
chamelion wrote:optimize speed from a linksys wrt320N i need to be running at 40mhz b/w and 5ghz frequency
  • The Linksys Dual-Band Wireless-N Gigabit Router WRT320N is a good deal for those looking to create a network that only supports the 5GHz band. While the router supports 2.4GHz as well, unfortunately it does not support them both simultaneously.
    http://www.zdnet.com.au/reviews/hardwar ... 858,00.htm
I don't have any personal experience with a WRT320N, however, I am running several Intel 4965AGN cards on 5Ghz bands with a Linksys WRT600N router, and achieving 270 Mbps raw link speed connections.

To achieve best reliability and coverage with 802.11n connections you really need three Wifi antennas. A T60 only comes with two WiFi antennas. I fitted a third antenna in my T60, under the palm rest, and can achieve 270Mbps connections using a 4965AGN.

Cheers,

Bill B.

chamelion
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Joined: Wed Dec 17, 2008 9:33 am
Location: london, UK

Re: 802.11n minipci advice

#3 Post by chamelion » Tue Jun 16, 2009 1:47 am

hi bill,

Thanks for the response! I was actually doing more digging around last night cause i could've sworn that the 4965 WAS dual band. but i couldn't figure out why i wasn't getting the speed.

i think i figured it out. basically my 4965 IS dual band, it CAN connect to 2.4ghz and 5ghz. but, it doesn't support the 40mhz bandwidth, only 20. in the meantime, my router is the linksys 160N, which is single band - it can support 2.4ghz only but can offer 20 and 40mhz bandwidth.

so where the router fluorishes (40mhz bandwidth) the card can't connect, and where the card fluorishes (5ghz frequency) the router can't offer.

ideally i want BOTH - 5ghz AND 40mhz. which would require me to upgrade both my card and router.

am i on the right mark now? :) and if so, will the apple adapter linked on ebay do the trick to at least get my PC 5ghz+40mhz capable?

re: the antennas, when i got my 4965 i put in the 3rd antenna under the keyboard, so no issues with that :)

rssb
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Re: 802.11n minipci advice

#4 Post by rssb » Tue Jun 16, 2009 10:13 am

So can these antenna's for wireless card the third one and the WWAN sit any place without interfering with anything else.

Any place to get these 3rd antennas cheaply

Thanks

Nihan
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Re: 802.11n minipci advice

#5 Post by Nihan » Tue Jun 16, 2009 3:08 pm

rssb wrote:So can these antenna's for wireless card the third one and the WWAN sit any place without interfering with anything else.

Any place to get these 3rd antennas cheaply
There are Ebay sellers who provide them quite cheaply.

I don't think there'd be any interference when installed under the keyboard/palmrest. I haven't noticed anything at least.
T61 8895-CTO 14,1" UXGA, T60p 2008-CTO 15" QXGA, X60 1706-CTO, T40p 2374-EG0, X32 2672-N7U

bill bolton
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Re: 802.11n minipci advice

#6 Post by bill bolton » Tue Jun 16, 2009 9:13 pm

chamelion wrote:it CAN connect to 2.4ghz and 5ghz. but, it doesn't support the 40mhz bandwidth, only 20.
The 4965AGN definitely does support 40MHz bandwidth in the 5GHz band, as this is provisioned in the 802.11n Draft 2 (and later) specs. The 802.11n Draft 2 (and later) spec requires that use of a 40MHz channel in the 2.4GHz band be supressed.

Experience with the initial 802.11n draft spec showed that using a 40MHz channel on the 2.4GHz band (that is, "bonding" two 20MHz channels together) turned out to be very problematic in terms of both reliability, and sociability with 802.11b/g traffic in locations where there are numerous 802.11b/g WLANs in operation.

BTW, you need to be using WPA2 + AES encryption on your WiFi link to achieve maximum performance from an 802.11n connection.

Cheers,

Bill B.

chamelion
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Location: london, UK

Re: 802.11n minipci advice

#7 Post by chamelion » Thu Jun 18, 2009 3:34 am

ah ok so you're saying the 4965agn connects to:

2.4ghz @ 20mhz
5ghz @ 20mhz
5ghz @ 40mhz
?

BUT, it won't connect to 2.4ghz @ 40mhz?

but the linksys 160N router i currently have does not offer any of the 5ghz, so i'm stuck at using 2.4ghz @ 20mhz which allows the least throughput.

so basically, all i need to do is upgrade my router (say to the 320N) which allows transmission of 5ghz @ 40mhz, and my laptop adapter will automatically select this mode and bring about the highest possible throughput?

bill bolton
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Re: 802.11n minipci advice

#8 Post by bill bolton » Thu Jun 18, 2009 5:45 am

chamelion wrote:so basically, all i need to do is upgrade my router (say to the 320N) which allows transmission of 5ghz @ 40mhz, and my laptop adapter will automatically select this mode and bring about the highest possible throughput?
Basically... yes!

Cheers,

Bill B.

chamelion
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Joined: Wed Dec 17, 2008 9:33 am
Location: london, UK

Re: 802.11n minipci advice

#9 Post by chamelion » Thu Jun 18, 2009 5:49 am

many thanks :) saving me about £20 and some hassle as i was going to upgrade my notebook minipci card too. now it's just the router i need to upgrade, which is a simple upgrade!

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Re: 802.11n minipci advice

#10 Post by Kamika007z » Sat Jun 20, 2009 2:37 am

When I retrofitted my T61p to a symmetrical LCD casing from the T60, I ran the white antenna through the LCD just like the Grey and Black antennas, and was able to fit it on the right side of the bezel. It took a while to get it router properly, but it did work out well.
T61p [8891-CTO]: Intel X9000 (2.8GHz) CPU, 8GB RAM, 128GB OCZ Vertex 2 SSD, 14.1in 1400x1050 (4:3) Modified Symmetrical LCD cover & bezel, nVidia FX 570M, DVDRW, Intel 6300 WiFi, BT, FR, Windows 7, SLIC2.1, Unlocked SATA II middleton BIOS, WLAN Whitelist Modified. Mint Condition.

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