[HowTo] GPRS/3G/HSDPA/UMTS USB modem Huawei E220 on Asus router

[newbiefan]

@Malks

Well, when your /etc/resolv.conf is emty it means, there is no connection.
Hence we are able to detect a lost connection. First of all, we should find a way to reconnect without rebooting.
Can you try the following when connection is lost:

'killall pppd'

It can take some seconds to reconnect....

If it doesn't work, try:
'reboot'

further, when you have a working connection do a:
'cat /etc/resolv.conf'
and write down ip of nameservers. Then enter webif, ipsetting, wan&lan and enter under item wan dns servers your nameservers - apply & finish.

keep me posted....

[Malks]

Hi Newbiefan,

And that's the core of the problem. The pppd actually determines there is no connection and detects that correctly. The problem is it tries to send it's AT commands to the modem as part of its connect script and instead of getting a response like 'OK' it gets the actual stream of data and so the connection fails. Doing a 'killall pppd' doesn't help as the modem stays connected. Even doing a reboot doesn't help as the USB port doesn't seem to get powered down as the modem stays connected after a reboot. A cold shutdown/restart does work though.

Thanks for your input.

Regards,
Anthony.

[newbiefan]

Funny, when I kill 'dial' , I get the pretty same behavior.

So I would suggest to try:
killall dial
killall pppd
reboot