[NTLUG:Discuss] Wireless Home Network -- 2.4GHz band

[terry]

Burton M. Strauss III wrote:
> Actually, it's BOTH.
> 
> Using channels other than 1, 6 and 11 is perfectly proper and legal.  It's
> just that is may cause more interference.  For example using 9 might degrade
> another user on both 6 and 11.

Well, "proper and legal" are not terms that really fit, but...you CAN do 
it,  but it's not recommended [to use channels other than 1, 6 and 11] 
And the reason is that if your neighbor ever gets a  wireless system, 
you'll both experience overlapping interference and it won't be apparent 
what's wrong.  In other words, yours will just all-of-a-sudden become 
slow and intermittently problematic, and so will his and neither of you 
will know what the problem is, that is, unless  you know these concepts. 
  Even if you break out a spectrum analyzer,  you'd see that there's 
interference, but won't know why.

I would consider operating on 1, 6 or 11 proper,
and deviating from that convention, improper.

As far as "legal", that term just doesn't apply, because these are 
un-regulated frequencies.  As you say below, it's a "free-for-all".  In 
order to make it work out, in order to make and keep our wireless 
networks reliable, we must police ourselves, IMHO.

> 
> Remember, the ISM (Industrial/Scientific/Medical) band has two simple rules:
> 
> 1. Eat anything blasted at you.
> 2. Don't blast anyone else.
> 
> Beyond that, it's a free-for-all.
> 
> In the case of WiFi, they defined a standard, but that still has to live
> within the ISM 2.4GHz band rules.  The WiFi standard defines 11 channels of
> which three do not overlap.

And so it follows that those are the three channels we should use.

> 
> But 2.4GHz cordless phones can use any part of the ISM spectrum they dang
> please.
> 
> So you have THREE common sources of interference to get around
> 
> 1. Microware oven
> 2. Other WiFi users
> 3. Other ISM 2.4 users such as your cordless phone.
>

If you use bridges instead of adapters, you'll have more power and 
flexibility and may even be able to overcome those sources of 
interference's,
two of which we have complete control of:
The Microwave ovens and cordless phones, if they are in close proximity 
  and are causing interference, (close enough to interfere), one can 
move, or change, or get rid of, or somehow shield or attenuate, these 
devices, because if they are that close, they are (more than likely) 
going to be in the same household or office, and will belong to the 
owner of the WiFi equipment and he or she will have complete control to 
do what ever it takes to resolve the conflict.

my2cents  :)

> 
> -----Burton
> 
> 
> 
> 
> 
> 
>>-----Original Message-----
>>From: discuss-bounces at ntlug.org [mailto:discuss-bounces at ntlug.org]On
>>Behalf Of terry
>>Sent: Tuesday, June 22, 2004 2:52 PM
>>To: NTLUG Discussion List
>>Subject: Re: [NTLUG:Discuss] Wireless Home Network -- 802.11 v. 11a v.
>>11b v. 11g v. "54g"
>>
>>
>>Bryan J. Smith wrote:
>>
>>>Jack Snodgrass wrote:
> 
> 
> <snip />
> 
>>>About the only complaint I have about the Linksys solutions it that they
>>>make is damn hard to switch away from the default channel of 6 in their
>>>router and Windows drivers (just set my father up the weekend for Day's
>>>day).  I like running on channel 9 for various reasons -- including
>>>trying avoid issues with 2.4GHz cordless phones (WLAN typically wins).
>>
>>NO, it's not issues with cordless phones, it's because you need to stick
>>to the standard channels so that you don't cause overlapping
>>interference for yourself and others.  Channels 1, 6 and 11 are standard
>>channels, use them, use it as it's designed to be used and it works
>>better.  (We must remember that it's spread spectrum.)
> 
> 
> 
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> 


-- 
but test everything; hold fast what is good,
1 Thessalonians 5:21