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Old 07-18-2004, 05:42 PM   #1
LQ Newbie
Registered: Jul 2004
Distribution: Red Hat 9
Posts: 2

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Unhappy modem stops receiving data

Hi guys

I have installed RedHat 9 on my old computer and now I'm trying to get my internet connection to work using a Creative Modemblaster V92 Serial. The modem doesn't appear in the hardware browser, and when I use the internet configuration wizard to probe for modems it doesn't find anything.

However, I have manually configured a modem device (with the network configuration tool) and told it to look for the modem on the serial port (/dev/ttyS0). Then it works fine to connect and surf the internet for maybe a minute or two. But then the problem starts.

Suddenly the modem just stops to receive data. It stays online (no disconect) and the diod for sending data flashes occasionally, but it doesn't download anything. If I disconnect and the reconnect it works again for maybe another minute and then stops to receive data again.

Do any of you guys have a suggestion about what could be wrong with my connection and how to fix it? I am quite new to Linux, so anything that helps would be appreciated.

Please tell me if you need any other information about my system. Thanks a lot.
Old 07-19-2004, 08:09 AM   #2
LQ Newbie
Registered: Jul 2004
Location: Tehran
Posts: 24

Rep: Reputation: 15
Sorry for my bad english.
1- plug your modem into your computer again.
2- At first your linux may not attached modem with ttyS0
type this in terminal:
link /dev/ttyS0 /dev/modem
Then without looking to hardware browser or something like that go to kppp or another dial-up applications to create a connection with /dev/modem for your modem address.
3- Enter an appropriate DNS ip like :
4- If it doesn't work check your rpms.
5-At last throw your modem outside of house.
6- Don't do the fifth part and wait for someone who knows more than me and can help you.

If These were useful for you AFFERO me please!
Old 07-20-2004, 09:54 AM   #3
LQ Newbie
Registered: Jul 2004
Distribution: Red Hat 9
Posts: 2

Original Poster
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Thanks for the tips. I have tried your steps 1 to 3, but unfortunately there was no improvement. I don't know what to check for in my rpms.

However, I'm starting to suspect something is wrong with the modem. I borrowed a friend's modem and it ran perfectly with the same settings. I will have him test my modem as well.
Old 07-21-2004, 04:32 AM   #4
Registered: Jul 2004
Location: Canada
Distribution: Kubuntu 10.10
Posts: 134

Rep: Reputation: 15
Try changing your MTU to something like 296 or 576. I'd recommend 576.


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