[arch-general] wvdial and ppp configuration

Fons Adriaensen fons at linuxaudio.org
Sat Sep 10 17:53:01 EDT 2011

On Sun, Sep 11, 2011 at 05:31:44AM +0800, Ray Rashif wrote:
> wvdial needs to start pppd to connect. Without pppd, wvdial is
> useless.

??? wvdial only starts pppd *after* having made the connection.
It certainly doesn't need pppd to make the connection.

> The ppp0 is the proper device (registered by pppd), and not
> usb0. I don't know which brings that one up, but I suppose it's the
> usb_modeswitch thing.

Usb_modeswitch just switches the USB device into a different mode.
Then some magic in the system recognises a network interface and
creates usb0. Usb_modeswitch can't do that, it just looks for a
particular USB device and if it finds it sends a string of bytes
to it. That's all it ever does.

> A dhcp client is used at the end, after dialling, after connecting.


> The man page has a good explanation of this process in the first few
> paragraphs, which might also explain the don't-know message. You can't
> optimise your connection any further. If it works, it works.

Yes it works. But it also seems that this modem is able to
provide a network interface directly, without needing ppp,
and only needs the connection to be set up. The question is
how to use it, maybe it requires some as yet unknow modem



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