IMac + Airport + AppleTV

Hello all...
I run into a strange situation once it a while. Sometimes when I sync media to my AppleTV, my Airport drops to 2 bars and doesn't work anymore. Normally it is at full strength because it is 30 feet from my Airport Express (802.11g model) but when I sync, it drops one bar with limited connectivity, then drops all the way down to 2, at which point it isn't connected to the internet anymore. Now it doesn't do this all the time, so it's hard to reproduce. Sometimes it will go for two weeks without trouble, but this morning for example, it happens every time it tries to sync. I have to turn Airport off and back on again to get back up to full strength, at which point my AppleTV disappears from the sources in my iTunes, and is a hassle to bring back up. It's a frustrating cycle. Just wondering if anyone has any ideas why this happens and what I can do. This may be an Airport problem, in which case this question may be moved, but it only happens on my iMac, so I put it here.
Thanks!

Lighten up Winston, look up the documentation and cases referenced and see that I am in fact stating facts. Plus it is my opinion. There is no need to duel over this opinion... please do not make me out to be untruthful, as you will note - everything is documented at Apple.
#1 - Yes they did tell me this WEP security info, see case # 90098512 12/29/07.
#2 - In addition Apple Support on 12/30/07 case # 89978223 recommended the 802.11N because the throughput for 802.11G is much slower. My network does not have a problem using "G" as I stream content as well. It is just slow to transfer data inherently, technically speaking.
#3 - Good for you, glad everything is working flawlessly for you - maybe you don't have the interference in the UK that we have here locally in the USA? Mine works fine too, but this area does get interference from other IR devices.
#4 - According to Cheryl ref case # 90098512 - "Not ALL iTunes downloads are recognized by AppleTV"
It IS a possibility that you don't have all the facts pertaining to the discussions, directives, and problems but they were all documented. Please, with due respect - may we please end this thread? I only stated facts that are documented and that were told to me. Believe them as you wish.

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Hi,
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http://discussions.apple.com/thread.jspa?messageID=607293
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http://discussions.apple.com/thread.jspa?messageID=607596
Here is yet another link that has some really good information and can be usefull for you and others
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I unclicked "create a closed network" and now
everything seems to work on wake from sleep and on
restart. Is that the same as broadcasting the SSID?
Yes
If anyone else is following in my footsteps, I also
changed the security from 40 to 128 bit WEP at the
same time because if WEP is a useless scheme as I've
read, I want it to be the best darn useless scheme
it can!
Though 128bit WEP can be hacked, it takes a lot more traffic to find the key then using 40bit WEP.
Thanks iFelix. Any idea how much chance there is for
someone hacking my WEP in a residential neighborhood?
Depends on who your neighbours are...
To be honest if you lived in an apartment block I would argue you were more at risk than if you live in a detached property with only a couple of neighbours.
Should I update my wireless system? I'm happy with
the performance of the AirPort otherwise,
If you're happy and it's working, keep it as it is.
but I'm
disappointed that they don't allow an upgrade to a
more secure system and also VERY disappointed that I
can't at least create a working closed network with
my new Apple iMac.
The thing is putting your Airport base station in a brown paper bag adds as much security as creating a closed network does.
A wireless network is still broadcasting and therefore detectable regardless of whether you broadcast the SSID (closed network) or not.
A determined hacker (one who can hack 128bit WEP) will not be put off by a closed network.
As for casual users, well the 128bit WEP will stop them.
Unfortunately "Closed" networks, MAC access control lists, and reduction in transmission power are all more "feel good" security rather than real security. All these various approaches are dated and mistakenly lead to overconfidence.
WPA is your friend if you value wireless security, but that will only be possible if you upgrade your wireless router.
It could be for a variety of reasons why your Mac and original Airport don't like working with a closed network, however it does seem to happen more often when using hardware from different manufacturers.
The reason why your previous Mac didn't have this issue is that it used a different wireless chipset to your new Mac, which is the main reason for the issue you are having now.
iFelix

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Hi,
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