[ILUG] O2 Siemens S45 GPRS with laptop

[Gavin McCullagh]

Hi,

discovered this last night:

http://www.physiol.usyd.edu.au/daved/linux/gsm-modem.html

ie how to use my Siemens S45 (or many other phones) as a bog standard
external modem for my laptop/pc.  You quite literally tell pppd to use
/dev/ttyS0 (which is where I connected my phone to) and use it as normal.
Very, very slick I thought.  This was just an ordinary indigo dialup
though and not uncostly to say the least at.

GPRS would be a smarter way to do it.  I mailed one of the guys who had
done it before and he said I needed a chat script like:

*************************************
TIMEOUT 45
ABORT BUSY
ABORT WAITING
ABORT "NO CARRIER"
ABORT "NO DIALTONE"
"" ATE1
OK 'AT+CGDCONT=1,"IP","internet"'
OK ATDT*99***1#
CONNECT
TIMEOUT 15
*************************************

I tried this.  It appears to be working up to a point but never does.  The
syslog displays all up to the second AT command with the reply.  Then I get
multiple lines of gibberish from it and a "Failed".  I tried changing the
baudrate to no apparent avail (and given the baudrate was fine for the
analog I'd assume it should be right for this too).

Has anyone done this?  Does anyone know how to do it?  It seems like what
I'm missing might be something Provider specific.  I'm using O2.  Siemens
have a manual with settings for every company under the sun except eircell
and O2 in ireland.

Anyone have any suggestions.

Gavin