Re: Best WiFi transmitters?
- From: Josh Russo <josh.r.russo@xxxxxxxxx>
- Date: Wed, 18 Aug 2010 04:06:34 -0700 (PDT)
On Aug 18, 2:48 am, Jeff Liebermann <je...@xxxxxxxxxx> wrote:
On Tue, 17 Aug 2010 12:08:49 -0700 (PDT), Josh Russo
I like this kind of problem. A real mystery.
model: Linksys WRT54G2
firmware: 1.5.01 build 008, Aug 27 2009
That would be hardware version 1.5.
Current version is 1.5.01 build 013, 02/03/2010
The release notes mumble that built 13 fixes:
-Change wireless broadcast/multicast data rate from 11Mbps to 1Mbps.
which might have an effect if your using a hidden SSID.
Well I went to the Linksys site and downloaded the latest firmware but
the version the site gave me was:
1.5.01 build 013, Oct 21 2009
This matches the date in the file name that the site gave me
(FW_WRT54G2V1.5_1.5.01.013_US_20091021.bin) but it is not the same as
what the site reported being the latest version (the same version as
you indicated). It may be that I'm trying to download it from outside
the US. I'm currently living in Cape Verde west Africa with the Peace
Corps. I don't like to bring this up, because so often people write
off any problems like this to the fact that I'm not in the US. Could
you try downloading it to see if you get a different version, and if
so email it to me?
I can see it's currently using channel 6 in the admin console, but
I've been over the settings there a few times and I can't find a place
to change that. I can post screen shots if you would like.
On the Wireless -> Basic Settings page, the 3rd box down is "Wireless
Channel". Non-overlapping channels are 1, 6, and 11. Your SSID had
better be something unique other than the default "Linksys".
If all else fails I will try changing the channel, but I guarantee you
that where I am there is no overlap with other routers.
If the inside walls have aluminum foil backed insulation, you'll get
some blockage. 30ft should be no problem. How many bars or -dBm
signal strength to you get on the Acer laptop when things are working
and when things are NOT working?
As for what we are experiencing. My wife generally works from home all
day and never complains about the wireless connectivity when I'm not
there (yes I have asked that explicitly). The laptop is in the living
room and if I stand in the doorway to the living room she cannot use
What happens on the laptop? Any visible changes in signal strength?
If you're using a wireless connection manager (I don't know what comes
with the Acer), are there any diagnostics available? If you leave the
room, does connectivity return?
The construction around here is pure cement and cement block (or is
that concrete not sure) with re-bar only at the corners and in the
floor/ceiling. Same thing holds true with my friend's apartment where
signal strength is fantastic.
Basically what happens on the laptop is that the network speed just
slows way down, as illustrated by the Skype example. On a quick review
of the system I did not see any special apps for the wireless
management, but she is up and using the computer at the moment. I will
look more later to see if I can determine the signal strength. If
there are no apps already there, is there a download you would
Yes, if I leave the signal returns.
The other day she had bee on Skype for a few hours when
I got home. I was very careful not hover in between her and the
router. I sat on the other side of her and still the call became
scrambled and inaudible to the point where they could no longer speak,
just with my presence in the room. I could give you 100 other stories
just the same. It's too consistent not to have something to do with
Well, you sound honest and believable. If you don't mind, I'll ignore
the obvious conclusion and work on some more mundane possibilities. My
guess(tm) is that there is something else happening and that it's not
I would prefer the mundane, because those we can fix.
Sorry, yes, I am completely convinced that some how my body is
creating interference. I know there are lots of things out there that
say nothing about the potential of human interference but I have a
history of mixing strangely with electronics.
About a year ago, a problem appeared in another newsgroup involving a
DSL failure that only occurred at night. Plenty of bizarre theories
were offered until it was discovered that the house had some very
noisy room light dimmers, that were only turned on at night. Replacing
the light dimmers solved the problem.
I had another that would fail when someone turned off the lights. The
problem was traced to a floating neutral on the power line. When the
lights went off, the voltage to the wall wart would drop slightly,
causing the router to go weird. I measured 95VAC to the router wall
So, what are you doing when you enter the house? Turn anything on?
Garage door opener, automated cat feeder, wireless bungler alarm,
negative ion generator, microwave pop corn, etc???? Are you plugging
your cell phone into a charger? Something electronic or electrical
has to be changing, but what?
No, generally I just walk in and go over to talk about my day and end
up getting yelled at (jokingly of course, this has become a very
Long ago, in the age of
modems I had a modem that refused to connect if I was sitting at the
computer. With out fail, if I clicked connect and walked away from the
computer it would connect. I don't know if these situations are
connected or not, but my own experience has shown I have a strange
effect on electronics. (Oh ya, and I work with computers, go figure)
I had a customer like that. I would take a perfectly good working
computer, let her use it for a few days, and it would promptly exhibit
bizarre and irreproducible symptoms. We even exchanged machines at
one point, only to find that the problems stayed with her, and not
with the machines. Gremlins, poltergeists, and hauntings I guess.
Thank you for being realistic and not snarky, this is a real problem
that is causing real frustrations.
Is there any more info that would be useful?
1. Is the Windoze 7 on the laptop up to date with all the necessary
Yes, I make sure it is fully up to date.
2. Do a site survey for interference. The easiest way is to download
and install inSSIDer from on your wife's laptop:
Click on "details" to see what it will display. Let it run for a few
minutes. Click the mouse anywhere in the inSSIDer window to designate
the window "focus". Then hit <alt><Prnt-Scrn>. Nothing should
Programs -> Accessories -> Paint
and hit <ctrl>V to paste the image. Save as a JPG file. Post it
somewhere on the internet or just email it to me at the address below.
That will show how much interference you are getting from neighboring
WLAN's. The problem is that it will NOT show any hidden SSID LAN's,
so there's no guarantee that there are more. It will also show which
channels are hopefully unoccupied.
I just sent you the scan. Let me know if you got it.
3. Drag the Acer laptop to a coffee shop with wi-fi or your friends
house and see how it works with and without your presence. If you see
the same symptoms, it's something in the laptop. If not, it's
possible that the router is defective (but not certain).
That may be difficult but I will ask around. My friend's place is not
convenient, it's a 45 min boat ride away.
4. Try a different wireless router. Beg, buy, borrow, or steal one.
Be sure to unplug your existing router when testing.
That may be difficult too, but I will see what I can find.
Thanks for taking the time.
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- From: Jeff Liebermann
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