>> Most do.
>
> exactly. GPRS phones work with an extended version of the AT command set.

I've tried both a 5140 and a 6100 and neither phone seems to respond to AT 
commands (confirmed in minicom). It seems as though the cable itself 
contains the USB-serial device and it gets detected as a USB - serial 
controller all on its own (without plugging the other end of the cable into 
the phone), maybe this is the problem.

Brad

----- Original Message ----- 
From: "Harry Waddell" <waddell@caravan.com>
To: "Perry E. Metzger" <perry@piermont.com>
Cc: <bradd@cat.co.za>; <netbsd-help@NetBSD.org>
Sent: Wednesday, October 26, 2005 11:31 PM
Subject: Re: Nokia as GPRS modem


> On Wed, 26 Oct 2005 09:28:40 -0400
> "Perry E. Metzger" <perry@piermont.com> wrote:
>
>>
>> "Brad du Plessis" <bradd@cat.co.za> writes:
>> > Obviously, a cell phone won't respond to AT commands like a modem, but
>>
>> Most do.
>
> exactly. GPRS phones work with an extended version of the AT command set.
>
>>
>> My EVDO card pretends to be a USB controller with a USB serial device
>> attached to it, just so it can pretend to be a modem and take AT
>> commands.
>>
>> Once we taught the telephants the idea of "Serial + AT commands", they
>> never were able to learn anything else. Not enough room for two
>> thoughts at once I guess.
>>
>> In many cases, though, you have to use "special" phone numbers
>> and PPP authenticators to get on line. I suggest using a USB tap
>> program to watch the interactions your device has with Windows to
>> learn exactly what it does to get onto GPRS.
>>
>> Perry
>
> One extra bug-a-boo is that newer nokia phones, e.g. the 6230, have some
> weird CR/LF thing going on that older phones, e.g. the nokia 6200 and 
> 6820,
> don't have. So, the chat script is actually different depending on the age 
> of
> your nokia phone.
>
> For at&t wireless GPRS, my chat script on my 6230 is
>
> TIMEOUT 10 ''
> AT\n OK--AT--OK
> ATDT*99#\n CONNECT
>
> for an older phone, remove the "\n".
>
> Your pppd options file should look something like this:
>
> local
> /dev/dtyU0
> 230400
> crtscts
> noipdefault
> defaultroute
> user dummy
> noauth
> connect "chat -t 20 -v -f /etc/ppp/chat/6230"
> ipcp-accept-local
> ipcp-accept-remote
> noipv6
> lcp-echo-interval 0
> lcp-echo-failure 0
> noaccomp
> nobsdcomp
> noccp
> nodeflate
> nopcomp
> nopredictor1
>
>
> Several of the above lines probably aren't needed. The ones at the top
> almost certainly are.
>
>
> -- 
> Harry Waddell
> Caravan Electronic Publishing
> -----------
>
>