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I am having the exact same issues as most with Airport on both my iMac and Macbook since 10.5.2. I am in Japan and use NTT (AT&T for Japan basically).

I think the problem resides with Leopard vice anything else. I have a Dell laptop with XP and another Dell with Ubuntu that both run flawlessly as did the Macs before Leopard. If I have a wired connection everything is good, it is only with systems with Leopard that are giving me problems when wireless.

I have a D-Link DIR-625 router and have never had issues before now.

The only time I had any consistent luck was with 10.5, unfortunately I am going back to it full time now at least on my MacBook.

I have a DLink as well, though its the DGL-4300. I was having problems in 10.5.1 with my Powerbook. EVERY time I'd wake it from sleep it couldn't find my wireless network.

The short-term fix was to switch my SSID to 'Broadcast'. Not particularly the solution I care for, as I like a multi-layered defense (MAC address filtering, WPA-2, and disable SSID broadcast). Anyhow, maybe that will help someone.

BTW, I NEVER had that problem in Tiger. Bottom line - Leopard's airport drivers SUCK.
 
i have a speedwire modem same problem

i didnt have this problem before upgrading to Leopard.

wireless on os10.4 ran flawless.

none of my equipment changed before i upgraded.

now my connection to the internet is always dropped.

I dont have a wire2 modem i was a original SBC client (now ATT) so i have a westall speedwire modem with a linksys router. imac duo intel i dont think its a modem problem but something is affecting the modem.

i notice that since the upgrade my computer wireless is now only showing 3 bars and my airport is like 8 feet away in an open room.

when my connection drops i do see a red light blink once, on my router

the OS 10.5.2 update had improved the modem from resetting for a few (maybe 1 or 2) days but its still doing it also i notice that, also every once and awhile my computer wireless shows all the bars but its not consistent... right now its showing 3 bars again, last night for a hour it showed full bars.
so that update did do something just didnt fix it.

im not having my ilife steve jobs SEAMLESS isnt seamless anymore it just seems Less. please fix it!
 
There is another modem/router

The Netopia 3347 is a wireless modem router/combo that should work just fine. They are $99 versus $79. I am going to try one out for awhile and see if it solves the problem. I will make sure and post what the end result is.

California, could you point me in the right direction at Apple to get this resolved?????
 
Possible Fix

I was browsing the support forums on the :apple: site and noticed a lot of people have resolved their Airport issue by going into their router and changing the "RTS (frame) and fragmentation threshold to 2306". The default is 2346, I believe.

I will try this when I get home, but would be interested to hear if this works for anyone here.:apple:

So far after a couple hours this solution has worked like a charm.
 
I was browsing the support forums on the :apple: site and noticed a lot of people have resolved their Airport issue by going into their router and changing the "RTS (frame) and fragmentation threshold to 2306". The default is 2346, I believe.

I will try this when I get home, but would be interested to hear if this works for anyone here.:apple:

So far after a couple hours this solution has worked like a charm.

Only problem with that solution is that the 2wire 2701 won't let you change the RTS settings. I think ATT is of the mindset that as long as Mac users remain less than 25% of the installed user base, support is an unnecessary luxury. I still get daily emails(and have for the past 18months) that my email settings are non-secure and must be updated to save the planet. I updated 3 times, had to go back to original settings 3 x. The last tech I talked to said "just ignore the emails. You don't need to update." I'm out in the middle of nowhere and ATT is the only "highspeed" game in town.
 
I too had that problem and got tired of it after awhile as my patience ran out and I switched to cable instead. The problem for me from my experience was this. The phone line wiring was messed up and whoever did it when they built the house did a crappy job and it wasn't stable with the connection. So whenever the home phone rang it would interrup the signal being sent from the 2wire modem so whatever I was looking at online through the dsl was getting stuck and wouldn't properly load. What I had to do was disconnect the phone line if I wanted to use the dsl. It was one or the other. Also, if I left the phone line connected and the person hung up after 2-3 rings then I just hit refresh and it would say the problem was resolved okay just like it did to you in that picture you provided. What I then had to do is close all browsers and restart again from the beginning. It got annoying after awhile and like I said my patience level was met. I don't think there would be anything wrong on your side other than it being something within your phone line. You should call and complain. They were trying to charge me $99 to get the line fixed but I said no thanks and just switched over. Now I get anywhere from 5-8 mb instead of my 1-2mb from dsl. I love the stable cable connection.
 
I too had that problem and got tired of it after awhile as my patience ran out and I switched to cable instead. The problem for me from my experience was this. The phone line wiring was messed up and whoever did it when they built the house did a crappy job and it wasn't stable with the connection. So whenever the home phone rang it would interrup the signal being sent from the 2wire modem so whatever I was looking at online through the dsl was getting stuck and wouldn't properly load. What I had to do was disconnect the phone line if I wanted to use the dsl. It was one or the other. Also, if I left the phone line connected and the person hung up after 2-3 rings then I just hit refresh and it would say the problem was resolved okay just like it did to you in that picture you provided. What I then had to do is close all browsers and restart again from the beginning. It got annoying after awhile and like I said my patience level was met. I don't think there would be anything wrong on your side other than it being something within your phone line. You should call and complain. They were trying to charge me $99 to get the line fixed but I said no thanks and just switched over. Now I get anywhere from 5-8 mb instead of my 1-2mb from dsl. I love the stable cable connection.

I hear you on the cable connection, but for those who don't have the option, dsl is a beggar. One thing. If you have the phone line issues, spring for the wiring coverage ($2 a month or so) for a month or two, then call up the phone company and have them fix it. Alternatively, running the wire is pretty simple. Pull new wire and be done with it.
 
I'm trying a different approach

I've given up on trying to get the 2Wire to be stable.

I went to the ATT store and bought a new Motorola DSL modem. I've wired that to a Time Capsule and after reconfiguring the Time Capsule I've had rock solid DSL connectivity. I've got the Time Capsule acting as a b/g/n WiFi router and its Airport Extreme seems to play much better with the Macs in the house
 
same...

its killing me.
also with the emails. after being on the phone with apple support and att support and NOBODY can help, i'm just continuously hitting the retry sending with selected mail button until the mail finally gets sent.
i just switched to att from TW cable which also kind of sucked.
i read that earthlink might be better? anyone know?
 
I've given up on trying to get the 2Wire to be stable.

I went to the ATT store and bought a new Motorola DSL modem. I've wired that to a Time Capsule and after reconfiguring the Time Capsule I've had rock solid DSL connectivity. I've got the Time Capsule acting as a b/g/n WiFi router and its Airport Extreme seems to play much better with the Macs in the house

The AT&T tech basically gave up and told me to buy a Apple router so I bought a Time Capsule and a Speedstream modem at Best Buy as the tech said it was the easiest to set up. The Time Capsule/Speedstream combo works great!

Anyone want to buy a slightly used 2Wire modem?
 
After upgrading to Leopard I couldn't get on my wireless anymore. Other friends with newer routers (e.g. Netgear) were not having a problem, something about 802.11g being a good signal...

anyway, I finally called Verizon and got walked through upgrading the firmware for my Westell Versalink 327W modem, and I appear to be connecting with no problem anymore.

I'm not sure of the exact steps, but it involved going to http://gonow.page.tl/, upgrading the 327W software, then going to the Verizon internet connection page (http://192.168.1.1/), and then at some point uploading the file I had downloaded at the previous page, and then going through and changing settings accordingly.

So the current news is: you don't necessarily need a newer router, you might just need to upgrade your current router/modem.
 
leopard, 2wire and DSL not working

I had a similar issue. My ATT DSL system was running slower then usual (both on my Imac and PC). ATT could not find any issue. They gave me a new 2701HG 2wire router to replace my 2700HG. This made things worse. Kept dropping internet link and froze up the present Web page I was on. The system would reconnect but needed to reboot to get back to original site. I changed the router to an older 1800HG 2wire and this fixed the drop out issue but web surfing was still slow. ATT again came out to check and found nothing. After 3+ weeks I got frustrated and switched to Cable (Comcast) and went to an Apple Airport express with my Motorola modem and now all is OK. I hate paying more for Comcast but I rather have a system that works.
 
Update to this issue

I had a similar issue. My ATT DSL system was running slower then usual (both on my Imac and PC). ATT could not find any issue. They gave me a new 2701HG 2wire router to replace my 2700HG. This made things worse. Kept dropping internet link and froze up the present Web page I was on. The system would reconnect but needed to reboot to get back to original site. I changed the router to an older 1800HG 2wire and this fixed the drop out issue but web surfing was still slow. ATT again came out to check and found nothing. After 3+ weeks I got frustrated and switched to Cable (Comcast) and went to an Apple Airport express with my Motorola modem and now all is OK. I hate paying more for Comcast but I rather have a system that works.

Update: now DSL is OK with 2700HG router and iMAC Leopard. I guess ATT did something to fix the issue on speed. I cancelled Comcast
 
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