USB Modem issue

[Sundar Dhanasekaran]

On Tue, 2009-01-20 at 09:12 +0100, Nils Kassube wrote:
> Karl F. Larsen wrote:
> > > On Sun, Jan 18, 2009 at 1:30 PM, Sundar Dhanasekaran
> > > <sundar261 at gmail.com> wrote:
> > >> $lsusb
> > >> Bus 005 Device 001: ID 0000:0000 Bus 004 Device 001: ID 0000:0000
> > >> *Bus 003 Device 003: ID 12d1:1001 Huawei Technologies Co., Ltd. E620
> > >> USB Modem* Bus 003 Device 001: ID 0000:0000 Bus 002 Device 001: ID
> > >> 0000:0000 Bus 001 Device 001: ID 0000:0000
> >
> >     You didn't say your using a Serial to USB converter. But your error
> > message assures me you are. These converters are poor at best. This is
> > your problem I think and better just live with the problem.
> 
> I don't think so. The lsusb output doesn't show a USB->serial converter 
> and Huawei modems _are_ USB devices which you can see from the lsusb 
> output as well.
> 
> 
> Nils
> 

I am using an USB based modem.  I do expect the connectivity to fail due
to signal strength at my location can vary occasionally.  The signal
fluctuations are momentory and the service gets disconnected.  

My bigger problem is having to reboot everytime the connection fails.
Is this because of USB / Datacard modem driver crash and gets loaded
properly when I reboot?  If so, is there a command / program (for
loading the driver) that is run at start up which I can execute without
having to reboot.

One solution suggested to me was to disconnect the modem and connect it
back after 15-30 secs.  But it didnt help in my case.