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Re: Configuring SLIP interface to use mobile phone as modem

Are you sure? From my point of view, SLIP and PPP use the same devices and 
besides being more "funky" in the configuration options, I see no advantage of 
PPP over SLIP. For all I know, it might even be more insecure.

Back on topic: Mayuresh, are you sure it is just ttyU0? I have witnessed in the 
past the weird and funny situation of a cell phone showing up as BOTH U0 and 
U1, and ONLY ONE of these actually WORKING.

Try connecting (as root) to the phone over "cu", e.g. cu -l ttyU0

If you can then say AT and get OK, then your modem is principally operational. 
If you get an error, then you have a principal problem away from PPP and SLIP.

-------- Original-Nachricht --------
> Datum: Sat, 06 Oct 2012 14:30:20 -0500
> Von: Dave Huang <>
> An: netbsd-users <>
> Betreff: Re: Configuring SLIP interface to use mobile phone as modem

> On 10/6/2012 2:15 PM, Mayuresh wrote:
> > My setup: NetBSD 6.0 rc1 on i386, Nokia N900 connected with USB cable.
> >
> > Kernel is configured to support ucom0, umodem0 and sl psuedo device.
> >
> > On connecting the modem is identified as umodem0
> >
> > Firstly I assume, SLIP is the right method to use as I do not need to
> dial
> > like in ppp, just need to connect with the device over USB LAN.
> I don't know anything about the N900, but SLIP is almost certainly not 
> the right protocol. Are you sure it's not PPP? On all the phones I've 
> used, to get a GPRS/3G data connection, I use PPP and use "*99#" as the 
> phone number. 
> is about 
> connecting it to a Mac, but it seems to confirm that it uses PPP with 
> *99# as the number, like other phones.

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