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[timconstan]

Yes, I read http://forums.dlink.com/index.php?topic=616.0 and have all the connections set as directed.

I spent several hours online with 3 support people and not able to connect at 802.11n -- only 802.11g.

I have a D-Link DWA-140 USB connector H/W version B2 with the latest driver.

Last person I talked with said that I need to wait for a firmware upgrade to the router.

I have a DIR-655, Hardware Version: B1, Firmware Version: 2.00NA

Based on my experience with the 2 other techs I don't have a lot of faith in this answer from the 3rd tech.  Can someone confirm that this is a known problem and give me an ETA on the firmware update?

[!!!!clarkkent]

Just to confirm, you have already set the following on the router?

1) 802.11N Mode = 802.11N Only?
2) Transmission Rate = Auto
3) Channel Width = Auto 20/40 Mhz
4) Security Mode = WPA-Personal
5) WPA-Mode = WPA2
6) Cipher Type = AES

And you are using the D-Link wireless manager for your adapter?
And you are still not getting 300Mbps?

Can you try setting the Transmission rate of the router to MCS 15 - 130 [270] and see if there's an improvement?

[davevt31]

It may not be the router, but the USB adapter that is causing the headaches.  Many of the USB Wireless adapters do not really work all that well, the antenna are very small in them and may have to pointed in a certain way to get good reception.

Also don't use the DLink connection manager, delete it if installed and let Windows handle the wireless connections.

[timconstan]

1) 802.11N Mode = 802.11N Only? - No.  I tried setting this to 802.11N  mode and got disconnected.  Could only reconnect by hard-wiring to the router and changing the setting back to Mixed.

2) Transmission Rate = Auto - Yes.

3) Channel Width = Auto 20/40 Mhz - Yes.

4) Security Mode = WPA-Personal - Yes.

5) WPA-Mode = WPA2 - Yes.

6) Cipher Type = AES - Yes.

And you are using the D-Link wireless manager for your adapter? - Yes

And you are still not getting 300Mbps? - Correct.  Says it's connected at 54Mpbps in 802.11g mode.

Can you try setting the Transmission rate of the router to MCS 15 - 130 [270] and see if there's an improvement? - Says it's connected at a higher speed.  Still says it's connected at 802.11g mode.  Seems slower.

[timconstan]

It may not be the router, but the USB adapter that is causing the headaches.  Many of the USB Wireless adapters do not really work all that well, the antenna are very small in them and may have to pointed in a certain way to get good reception.

Also don't use the DLink connection manager, delete it if installed and let Windows handle the wireless connections.

It seems like it would at least try to connect in 802.11n mode.  It says it's connected in 802.11g mode.

I unistalled the DLink connection manager and it deleted the drivers for the adapter.  Reinstalling the driver, reinstalled the DLink connection manager.  Followed the directions at http://support.microsoft.com/kb/871122 to use Windows's manager.  Had no impact.


UPDATE:  By the way I'm about 20' away from my router with no walls in-between.

[SomeFatGuy]

I have the same DWA-140 and I always get 300mbps, just use a different  set of drivers. Use Ralink driver, part #RT2870, that's what I'm using and works great here.

Also. DIR-655 A4 1.21

[timconstan]

I have the same DWA-140 and I always get 300mbps, just use a different  set of drivers. Use Ralink driver, part #RT2870, that's what I'm using and works great here.

Also. DIR-655 A4 1.21

Thanks for taking the time to reply.  I found the Ralink driver and installed it.  I was not able to connect to the network, so I configured the Windows manager and was able to connect.  Still connecting at 54M in 802.11g mode.

[timconstan]

Geting closer -- I opened my network connections, went into the properties of the wireless network, and then Configure for my USB Adapter.  In the Advanced settings I saw an option for Adhoc support 802.11n mode.  I enabled that and am able to connect at 130M in 802.11n mode.  My signal strength is very good and I'm only about 20' away from my router with no walls in-between.  Any more suggestions for getting this closer to 300M?

[JimMonz]

See if you can change/check your Windows Device Manager settings for the adapter.

Make sure "n" settings are set to "Auto".
On my adapter default settings were set to 20MHz and I couldn't connect over 65 Mbps until I changed it to Auto.

I hope this helps.

[marmoduke]

Absolutely do not use d-link connection manager, use the Windows "zero."  People have given you good advice here.

All I have to add is that you make absolutely sure of the following:

USB drivers are the latest and greatest available.

You are using a USB 2.x port.  If you are on an old machine with USB 1.x you will never achieve great speeds.

Also, what other USB devices do you have attached?  USB's performance degrade as devices are added.

Do not use "auto" for wireless channel selection.  Set your channel manually so one that is unoccupied by surrounding devices and neighbor's routers.  Use free software like InSSider to select your channel.

[davevt31]

Tim- don't use the setup routine to install the drivers, this will install the connection manager at the same time.  Install the drivers through the Device Manager by updating the driver there and pointing the installation routine to the folder that contains the drivers.