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Mac Forum / General / Networking / August 2004Airport Downloading Problem
Hi, I haven't stopped by com.sys.mac.comm for a while. I just spent a couple hours in Google Groups searching for an answer to my problem. I humbly come to you folks for help. I have a Snow ABS that I'm using as a WiFi and ethernet router. For my Intenet access, I'm using the dialup modem in the ABS. The problem is that in OS 10.2.4, I cannot complete some downloads. Seeing this is a slow dialup connection, it's difficult to do all of the testing that I would like. But it seems that the problem is particularly evident when trying to DL .dmg files. Especially fairly large ones 4-8MB. I haven't seen the same problem with .sit files or small files. The download gets to the last 10 seconds and never finishes. It doesn't matter which browser I use, I've tried 3 or so. I know it's an airport problem because I can switch over to internal modem and download the same file fine. Talk about aggravating. Waiting 45 minutes for file to download (I told you it was s-l-o-w) only to have to stall out in the last 10 seconds. Any ideas on what the problem is?? Thanks, SW << The download gets to the last 10 seconds and never finishes. >> SW- I haven't tried the built-in Airport modem, so haven't had to face your problem yet. I wonder if it could have something to do with handshake between the CPU and the modem vs the Airport and the modem? The server could have sent an "end of file" message, but the Airport (or CPU?) didn't recognize it. When you use a discrete modem, you often have the option of specifying which modem you use, which determines the setup string that will be sent to it when the call is first placed. Does the Airport handle its own setup string, or do you supply that in your Internet program? If that could be reconfigured in the Airport setup program, it might solve your problem. The only thing I see relevant in the manual's troubleshooting guide, is the warning about interference from cordless phones and microwave ovens. If interference were the problem, it might improve if you change the Airport's channel from one extreme to the other. Fred Sorry about being slow in rersponding, I had to take an unexpected out of town trip. I just got back. : << The download gets to the last 10 seconds and never finishes. >> : [quoted text clipped - 6 lines] : "end : of file" message, but the Airport (or CPU?) didn't recognize it. I would think that if that were the case. it would apply to all downloads, not just some of them. : When you use a discrete modem, you often have the option of specifying which : modem you use, which determines the setup string that will be sent to it when : the call is first placed. Since day 1, and 300 baud modems, I've always used my own modified modem scripts. : Does the Airport handle its own setup string, or do : you supply that in your Internet program? It uses its own.The only two that are available are a V.34 script and a V.90 script. I have been using the V.34 due to really slow phone lines. : If that could be reconfigured in : the Airport setup program, it might solve your problem. I haven't found any way to use anything but the inherent modem scripts. That was one of the first things I looked for. : The only thing I see relevant in the manual's troubleshooting guide, is the : warning about interference from cordless phones and microwave ovens. If : interference were the problem, it might improve if you change the Airport's : channel from one extreme to the other. Okay, I'll give that a try and see if it makes any difference. Thanks for the suggestions. SW : << The download gets to the last 10 seconds and never finishes. >> : [quoted text clipped - 10 lines] : you supply that in your Internet program? If that could be reconfigured in : the Airport setup program, it might solve your problem. I changed the setup script from V.34 to V.90 (the only other choice), but it made no difference. : The only thing I see relevant in the manual's troubleshooting guide, is the : warning about interference from cordless phones and microwave ovens. If : interference were the problem, it might improve if you change the Airport's : channel from one extreme to the other. I changed from channel 1 to channel 11 and that didn't help either. I still can't download .dmg files. Anybody else have any suggestions?? SW [...] | The download gets to the last 10 seconds and never finishes. | It doesn't matter which browser I use, I've tried 3 or so. I know it's | an airport problem because I can switch over to internal modem and | download the same file fine. | Talk about aggravating. Waiting 45 minutes for file to download (I told | you it was s-l-o-w) only to have to stall out in the last 10 seconds. | Any ideas on what the problem is?? [...] Do you have incoming call signaling on your phone line? Could you keep leave "Internet Connect" open during a long transfer and check you don't have any dropout? A better tool to check this is "AP Grapher".  Signaturedaniel Azuelos Pôle informatique - Institut Pasteur [sorry, posted this to comp.sys.mac.system by mistake] I have recently successfully set up 2 eMacs with freshly installed AirPort cards, but with no UFO basestation. One eMac shares its modem/Internet connection with the other by running NATd to relabel and redirect IP headers involving the AirPort and the modem. All working well, static routes, via Statup scripts, great... (just don't use Apple's GUI for sharing as it blows away your NAT rules. Apple wants you to buy a basestation!). I would now like to startup each machine's AirPort from these same Startup scripts, instead of from the menu-bar. I know that ifconfig en1 up will do this for me just fine, but I'd like to create or join (as necessary) the same ad-hoc (WEP enabled) network each time I reboot, too. Anyone know how to do this from the command-line? I have no fear of the shell or man entries. ______________________________________________________________________________ Dr Chris McDonald E: chris@csse.uwa.edu.au Computer Science & Software Engineering W: http://www.csse.uwa.edu.au/~chris The University of Western Australia, M002 T: +618 6488 2533 Crawley, Western Australia, 6009 F: +618 6488 1089 : [...] : | The download gets to the last 10 seconds and never finishes. [quoted text clipped - 10 lines] : : Do you have incoming call signaling on your phone line? No, I have a separate line for the computer. : Could you keep leave "Internet Connect" open during a long transfer : and check you don't have any dropout? A better tool to check this is : "AP Grapher". Why would it only drop out on .dmg files? :-) No, I don't have a drop out, the connection remains. Since AP Grapher requires a built-in Airport card as I recall, I cannot use it (I'm using a PC card). But I have used IPNetMonitor for a number of years, so I get the througput information. Thanks for your input. SW |
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