I’m setting up a wireless N network. I have an old computer with a wireless g adapter and, rather than run mixed mode, I’m going to hard wire that one to the router. It’s right by the router anyway. I have a relatively fast XP machine wired to the router and a Vista machine with the USB wireless N adapter. I tried running full N with the g adapter computer off. I could get 150MB/s as opposed to 65MB/s running mixed mode. However, I could not get the wireless computer to recognise anything but the LAN. It couldn’t see the outside network. I’m running in the 2.4 GHz band and, to run full N, I need to run a 40 MHz channel. I can’t see overlapping with anybody else because there’s only one wireless connection and the router is in my home. It is the only LAN in the building. What’s up? Can I pull off running a 40 MHz channel in the 2.4 GHz band?
I don’t think that is possible…unless there is someway to tweak the hardware, somehow…
I could be wrong (I am not a scientist), but I think 2.4GHz is pretty much set for the hardware…
The ISM bands defined by the ITU-R are (bands in italics are subject to local acceptance):
* 6.765–6.795 MHz (centre frequency 6.780 MHz)
* 13.553–13.567 MHz (centre frequency 13.560 MHz)
* 26.957–27.283 MHz (centre frequency 27.120 MHz)
[B]* 40.66–40.70 MHz (centre frequency 40.68 MHz)[/B]
* 433.05–434.79 MHz (centre frequency 433.92 MHz) in Region 1
* 902–928 MHz (centre frequency 915 MHz) in Region 2
[B]* 2.400–2.500 GHz (centre frequency 2.450 GHz)[/B]
* 5.725–5.875 GHz (centre frequency 5.800 GHz)
* 24–24.25 GHz (centre frequency 24.125 GHz)
* 61–61.5 GHz (centre frequency 61.25 GHz)
* 122–123 GHz (centre frequency 122.5 GHz)
* 244–246 GHz (centre frequency 245 GHz)
This is from Wiki…
i was under the impression (i used to sell these things to ppl all the time) that wireless N routers had the ability to put out B,G,and N networks all at the same time.(is B’s frequency different than G?)
From Wiki:
So, yes they are all the same frequency, just different ways of “channel” assignment, from what I can gather…b, g and n, that is…they extended the range with the n standard…up to 70meters, I think…
that is old info…
or it seems that way, amateur radio operators are by no means the only ones to use the 802.11b/g devices anymore.
No, they are not…but that is the way the spectrum is carved out…microwaves are even in the 2.4 GHz range…(they are old technology too)
The N standard has greater power and greater range…still recommend using channels 1, 6 and 11 to avoid interference, since each channel is 22MHz “wide,” as I understand it…
Each channel is 22MHz…recommended for the US and Canada is 1, 6 and 11 to avoid interference from other devices that use the same frequency…
I don’t know if you can tweak your unit to run across 2 channels or not…I am sure there is admin capabilities on your device…is the point to get a greater signal strength?
If so you can make a “cantenna” or buy one for very cheap…for longer distances needed, but most homes I know of will be covvered by the 78 meter coverage of N devices (what kind of antenna does it have?
I’m still thinking that it can work. I believe there is a recommendation against using 40 MHz channels in the 2.4 GHz band but not an industry prohibition. And, as videotoast said, that has to do with interference between channels. There are no other networks in my house. I can cut a 40 MHz swath out of the 2.4 GHz band and not step on anybody’s toes or see interference from anybody. As I said, I told my router to open a 40 MHz channel and the wireless N USB adapter started talking to the local network at 150 MB/s so it went up to its single channel specs.
To toast: There is a lot of firmware created to use instead of the stock firmware. Im sure it goes against companies policy, voids warranty
(They wont know if I reset it back to their firmware haha), and a really small chance of bricking your router, but switching http://www.dd-
wrt.com/dd-wrtv3/index.php was
the best router move ive ever done.
Anyways, so everything wired to the router works, but the comp with a the N adapter on it doesnt read anything? Sounds like your router settings
need to be changed. And if the usb adapter has any software, like a setup wizard, go though that.
The N adapter worked fine but in mixed mode it ran at 65MB/s. Granted, this is better than the 54 MB/s that G runs at but not at spec for N class. When I turned off the computer with the PCI G adapter (an old, slow computer that is now down in the basement as a small disk farm) and set up the router to run N only with 20/40 MHz select channel width, the N adapter jacked up to 150 MB/s (I believe this is spec) but it only ran on the LAN. That is, it wouldn’t go outside the modem and find RSU or anything on the net. By the way, I have historically run on wireless 2.4 GHz channel 10 just because I wanted to.
This time, I hard wired the basement disk farm to the router because it’s right next to it. I set up the router again to run N only but this time on the middle channel, channel 6, so I could slop over into the rest of the band if I needed. Again, I set up 20/40 MHz select channel width. This time it took off and ran the LAN and internet at 150 MB/s so it looks OK. If I try to set up the router wireless to run at fixed rates above 162 MB/s, it won’t connect. Even at the 162 MB/s setting the N adapter drops to 150 MB/s.
Any idea whether I can double the channels to jack the N adapter up to around 300 MB/s? The N adapter is an Airlink AWLL6070 and the (new) router is a D-Link DIR-615 into which I have flashed the most recent firmware.
Thanks for the responses.
Oh. It’s a 150N device. It’s supposed to run at 150 MB/s maximum. Now I’m happy.
If it’s not connecting to the web, but you can see everything else on the network, that’s likely a router configuration problem. When it was in mixed mode could it connect?
In mixed mode it always seemed to connect automatically. In N only mode sometimes it started both local and internet automatically, sometimes I had to open a web browser to get it to connect to the web, and sometimes I had to pop the USB adapter out and back in to get it to fully connect. Now that I have the settings where I want them it seems to auto-connect consistently with no difficulty. That is, when I finished experimenting and decided on optimum settings and left everything alone it started to connect reliably. Something about changing the router settings 20 times in an evening and rebooting the router seems to upset things a bit.
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