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2 Posts

04-07-2008

Canada

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Hekp with Intel 4965agn

2008-04-07, 16:43 PM
I just bought a T61 with Vista Business which I upgraded it to XP Pro SP2 and dowloaded all the updates. My wireless adapter is Intel 4965AGN version 11.5.0.36.
 
I have problems connecting to my access point in N mode. The only connection I can get is in G which gives me only 54Mbps. I'm using Linksys WRT300 wireless-N broadband router. I read most of the messages re: 4965agn  but i couldn't find a solution.
 
I also stopped ThinkAdvantage Access connections service to let Window to manage the connection but to no avail.
 
Can somebody please help.
Thanks
Sia
 
T61 7658-CTO
Core Duo T7500 2.2GHz
Intel 4965AGN v 11.5.0.36
 
 
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9 Posts

02-24-2008

United States

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Re: Hekp with Intel 4965agn

2008-04-07, 18:28 PM
May I suggest you call Lenovo support. I had problems with the same card and they sent me a new one.
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1960 Posts

12-02-2007

AU

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Re: Hekp with Intel 4965agn

2008-04-07, 23:21 PM


Sia wrote:
 
I have problems connecting to my access point in N mode. The only connection I can get is in G which gives me only 54Mbps. I'm using Linksys WRT300 wireless-N broadband router.
 

The 49645AGN card is 802.11n Draft 2 compliant and will only connect in ~270mbps link speed mode with an access point/routers which supports 2.4GHz and 5Ghz dual channel operation.  Your WRT300N router only operates in the 2.4GHz bands, so you will need something like a WRT600N routers to achieve ~270Mbps operation.
 
Also, to achieve anything more than 54Mbps link speed you must be using WPA2 encryption on the link, as this a requirement of the 802.11n Draft 2 specification.
 
With a 49645AGN, and setting WPA2 encrytion, I achieve 130Mbps link speed with a Linksys WRT350N router in a locality where there are no a lot of 802.11g networks active.   You may also be able to do that with a WRT300N (see below re interference from other networks).  You might also want to see if LinkSys has any firmware updates for your router.
 
If you are in an area which has a lot of 802.11g networks active, you may not be able to get better than 54Mbps line speed under any circumstances.  The issues with channel congestion in the 2.4Ghz band (where channles overlap and there are really only 3 non-overlapping channels) is what has driven the industry into going to the the 5Ghz band to achive reliable ~270Mbps links.  There are 12 channels available in the 5Ghz band and they do not overlap.
 
The 802.11n standard is still in development  and there is expected to be at least one more major draft released before a final specification is published!
 
Cheers,
 
Bill
 
 
------------------------------
I don't work for Lenovo
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2 Posts

04-07-2008

Canada

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Re: Hekp with Intel 4965agn

2008-04-08, 1:38 AM
Thank you for your help. I'm on the road until Friday.
I'll try connecting with WPA2 encryption and monitor the number of 802.11g networks.
I will report later.
 
Cheers
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4 Posts

05-07-2008

Planet Earth

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Re: Help with Intel 4965agn

2008-05-07, 22:40 PM
Well I purchased and returned a Linksys WRT600N router today as I couldn't get to draft N speed of 270 Mbps. In fact I couldn't get beyond 54 Mbps even on the 5 Ghz channel with my new T61 with an Intel 4965 AGN nic.

Spend zillions of hours with Linksys trying to tweak the 600N router's advanced wireless settings to no avail. Yes I was running WPA2, the 2.4 Ghz was connecting at g speed and the 5Ghz was always connecting at 802.11a speed no matter what!

There are a lot of 802.11g routers in the neighbor hood so I can understand the 2.4Ghz band getting stuck at 54 Mbps but  even the 5Ghz didn't fare well that was disappointing. Had the latest drivers for the intel nic and the router.

At this point it seems like the draft N speed boost is either a myth or a lot of vodoo. Till the draft N gets stabilized I think
we are better off sticking with 802.11g.


While on the topic of draft N, are there any 802.11n routers that people have managed to connect with a T61's 4965agn nic at 270 Mbps? If so what tweaks were needed to get that speed? Linksys wrt600n certainly didn't work for me in an area with a lots of 802.11g networks present.

T61  T9300
Vista Ultimate
Intel 4965 AGN v11.5.1.15


Message Edited by b_rahul on 05-07-2008 03:42 PM

Message Edited by b_rahul on 05-07-2008 03:46 PM
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37 Posts

03-07-2008

Zug Island, MI

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Re: Help with Intel 4965agn

2008-05-07, 23:47 PM
Not what you are looking for, but my WRT160N connects to my 4965a/g/n at 130Mbps, which is faster than 54Mbps!
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1960 Posts

12-02-2007

AU

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Re: Hekp with Intel 4965agn

2008-05-08, 3:30 AM


Sia wrote:
 
I have problems connecting to my access point in N mode. The only connection I can get is in G which gives me only 54Mbps. I'm using Linksys WRT300 wireless-N broadband router.
 

The WRT300N router only operates in the 2.4GHz Wi Fi band.  The best connection rate you will get from a 4965AGN card working solely in the 2.4GHz WiFi band is ~108Mbps... this behaviour is fully compliant with the 802.11 Draft 2.0 specification.
 
To get that 108Mbps speed you will need to have both the WRT300N and the 4965AGN set to use WPA2 authentication/encryption.
 
If you want to achieve ~270 Mbps connection speed you will need dual band (2.4Ghz/5Ghz) 802.11n router which is Draft 2.0 compliant, such as a LinkSys 600N
 
Cheers,
 
Bill
------------------------------
I don't work for Lenovo
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4 Posts

05-07-2008

Planet Earth

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Re: Help with Intel 4965agn

2008-05-08, 14:18 PM
aiiee

When you connect at 130Mbps, on your PC what is the  wireless status when you for instance mouse over the connection icon ?
Does it say 802.11g or 802.11n ?

In my case it always says 802.11a (5Ghz) or 802.11g (2.4 Ghz)




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37 Posts

03-07-2008

Zug Island, MI

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Re: Help with Intel 4965agn

2008-05-08, 15:39 PM
b_rahul:

not using home wireless right now, but I can tell you Access Connections reports it as 802.11n, and the graphic shows 3 antennae on the thinkpad, and double 'waves' representing the the radio signal, none of which happens on a 'g' connection.
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3 Posts

05-08-2008

new jersey

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  • Message 10 of 13

Re: Hekp with Intel 4965agn

2008-05-08, 21:43 PM
Have you setup WPA/WPA2 with AES encryption?
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