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konvwolf
27.11.2013, 12:30
Hi there!

I've got a brand new laptop L50-A-K3K with Atheros AR956x WLAN. My laptop connects to Thomson TCW770 router (which is woking in g/n mixed mode) only on 72,2Mbps instead of 150Mbps as my other notebook Z570 does.

I haven't found any clues to solving this problem on the internet. Is there any way to make my Toshiba laptop connect to the router on 150Mbps?

RandyRoberts
27.11.2013, 18:07
The WLan card supports 802.11 *b/g/n* standards.

Read this thread about the WLan standards and the single frequencies
http://forums.computers.toshiba-europe.com/forums/thread.jspa?threadID=72831

802.11 a supports 5Ghz
802.11 b supports 2.4Ghz
802.11 g supports 2.4Ghz
802.11 n supports 2.4Ghz and optional 5Ghz but only if the same chip would support 802.11 a standard.

So 2.4Ghz frequency is supported and this means that max 54Mbit/s data transfer rate can be reached.
But 54Mbit/s is just an theoretical value. Usual speed would be ~20Mbit/s = ~ 2.5Mbyte/s

konvwolf
27.11.2013, 19:32
See specs on 802.11n standard. It holds 150Mbps on single antenna (300Mbps on two antennas and 450Mbps on three).

Atheros AR956x doesn't support 5Ghz connection.
By your logic it means my notebook cannot connect to any access point on speeds higher than 54Mbps.

It's not true, cause even Toshiba specs say the WLAN adapter supports connections to routers on speeds up to 150Mbps. My Wi-Fi router - Thomson TCW770 - supports 802.11n and works in 802.11g/n mixed mode (for 802.11g devices could connect to wireless network).

My Z570 can connect to it on 150Mbps (and so it must be) while my wife's Inspiron with 802.11g WLAN is connected on 54Mbps (it's not a surprise because of 802.11g specs).

So my question is: why Toshiba L50-A-K3K cannot connect to the same TCW770 at the speed higher than 72.2Mbps?

One remark: when I switch my router to N only mode Toshiba connects to it at its maximum 150Mbps.

P.S. Some people asked same question here and never got any answer: [here|http://answers.microsoft.com/en-us/windows/forum/windows_8-networking/my-laptop-has-qualcomm-atheros-ar956x-windows-8-i/b203636b-b180-42d0-9f27-e203f02892c1?msgId=927e4896-f5c3-4160-8696-21d993276fc8]

konvwolf
27.11.2013, 19:33
See specs on 802.11n standard. It holds 150Mbps on single antenna (300Mbps on two antennas and 450Mbps on three). Atheros AR956x doesn't support 5Ghz connection. By your logic it means my notebook cannot connect to any access point on speeds higher than 54Mbps. It's not true, cause even Toshiba specs say the WLAN adapter supports connections to routers on speeds up to 150Mbps. My Wi-Fi router - Thomson TCW770 - supports 802.11n and works in 802.11g/n mixed mode (for 802.11g devices could connect to wireless network). My Lenovo Z570 can connect to it on 150Mbps (and so it must be) while my wife's Dell Inspiron with 802.11g WLAN is connected on 54Mbps (it's not a surprise because of 802.11g specs). So my question is: why Toshiba L50-A-K3K cannot connect to the same TCW770 at the speed higher than 72.2Mbps?

One remark: when I switch my router to N only mode Toshiba connects to it at iits maximum 150Mbps.

P.S. Some people asked same question here and never got any answer: http://answers.microsoft.com/en-us/windows/forum/windows_8-networking/my-laptop-has-qualcomm-atheros-ar956x-windows-8-i/b203636b-b180-42d0-9f27-e203f02892c1?msgId=927e4896-f5c3-4160-8696-21d993276fc8

konvwolf
27.11.2013, 19:37
See specs on 802.11n standard. It holds 150Mbps on single antenna (300Mbps on two antennas and 450Mbps on three). Atheros AR956x doesn't support 5Ghz connection. By your logic it means my notebook cannot connect to any access point on speeds higher than 54Mbps. It's not true, cause even Toshiba specs say the WLAN adapter supports connections to routers on speeds up to 150Mbps. My Wi-Fi router - Thomson TCW770 - supports 802.11n and works in 802.11g/n mixed mode (for 802.11g devices could connect to wireless network). My Lenovo Z570 can connect to it on 150Mbps (and so it must be) while my wife's Dell Inspiron with 802.11g WLAN is connected on 54Mbps (it's not a surprise because of 802.11g specs). So my question is: why Toshiba L50-A-K3K cannot connect to the same TCW770 at the speed higher than 72.2Mbps?

One remark: when I switch my router to N only mode Toshiba connects to it at iits maximum 150Mbps.

P.S. Some people asked same question here and never got any answer: http://answers.microsoft.com/en-us/windows/forum/windows_8-networking/my-laptop-has-qualcomm-atheros-ar956x-windows-8-i/b203636b-b180-42d0-9f27-e203f02892c1?msgId=927e4896-f5c3-4160-8696-21d993276fc8

RandyRoberts
28.11.2013, 09:43
>Atheros AR956x doesn't support 5Ghz connection.
This is correct.

Take a look here
[Not able to use the 5GHz band on the WLAN card in the "n" WiFi standard|http://aps2.toshiba-tro.de/kb0/TSB0502VM0000R01.htm]
and Wikipedia: http://en.wikipedia.org/wiki/IEEE_802.11n

As you can see the 802.11 n operates at 2.4Ghz (if module does not support additional 802.11 a) with 20Mhz (or double 40Mhz) bandwidth.

In case the of 20Mhz bandwith and the datarate is limited to 72.2 (Mbit/s).
In case the of 40 Mhz bandwidth the data rate up to 150Mbit/s would be possible.

i recommend you to read also this Wikipedia article
[List of WLAN channels|http://en.wikipedia.org/wiki/List_of_WLAN_channels]

konvwolf
03.12.2013, 18:05
After trying to tweak buggy Atheros AR956x WLAN-card I've finally replaced it with Intel 6235. This card supports both 2.4GHz and 5GHz bands. Now my laptop is connected to the router at 300Mbps speed.

RandyRoberts
04.12.2013, 10:10
Thanks for feedback!