cell phones

Does anyone know if it is possible to dial in to a linux box with a cell
phone?

I need to control some equipment with a cell phone, and I'm trying to
figure out an approach - DTMF, or something like ppp, or something else?

Can I set up a linux box with a cell modem as a GPRS 'server'? And if
so, how do I get the cell phone to connect to i?

Thanks,

--Yan


CptDondo

CptDondo <(E-Mail Removed)> writes:

> Does anyone know if it is possible to dial in to a linux box with a
> cell phone?
>
> I need to control some equipment with a cell phone, and I'm trying to
> figure out an approach - DTMF, or something like ppp, or something
> else?
>
> Can I set up a linux box with a cell modem as a GPRS 'server'? And if
> so, how do I get the cell phone to connect to i?

I'm not sure why you'd want to establish such a complex system yourself
when folks like AT&T, Cingular, SunCom, etc., have already done that for
you.
--
% Randy Yates % "Maybe one day I'll feel her cold embrace,
%% Fuquay-Varina, NC % and kiss her interface,
%%% 919-577-9882 % til then, I'll leave her alone."
%%%% <(E-Mail Removed)> % 'Yours Truly, 2095', *Time*, ELO
http://home.earthlink.net/~yatescr

Randy Yates wrote:
> CptDondo <(E-Mail Removed)> writes:
>
>> Does anyone know if it is possible to dial in to a linux box with a
>> cell phone?
>>
>> I need to control some equipment with a cell phone, and I'm trying to
>> figure out an approach - DTMF, or something like ppp, or something
>> else?
>>
>> Can I set up a linux box with a cell modem as a GPRS 'server'? And if
>> so, how do I get the cell phone to connect to i?
>
> I'm not sure why you'd want to establish such a complex system yourself
> when folks like AT&T, Cingular, SunCom, etc., have already done that for
> you.

Customer demands... Basically, the machines I'm trying to connect to
have no way to connect to connect to the web other than via a cell
phone. But the connection need only be a few minutes a day, so a
full-time subscription with unlimited internet is not cost effective.

So I'm looking for a way to enable a customer to dial in to his/her
machine, check it out, and then hang up.

DTMF would be ideal, but I can't figure out how to enable DTMF for a
cell modem - I suspect it's a lost cause.

On 08/06/2007 09:52 PM, CptDondo wrote:
> Does anyone know if it is possible to dial in to a linux box with a cell
> phone?

Yes.

> I need to control some equipment with a cell phone, and I'm trying to
> figure out an approach - DTMF, or something like ppp, or something else?

Yes, impossibly the following might be what your looking for:

mgetty - Smart Modem getty replacement
mgetty-pvftools - Programs for listening and manipulating pvf and rmd files
mgetty-voice - Voicemail handler for mgetty

> Can I set up a linux box with a cell modem as a GPRS 'server'? And if
> so, how do I get the cell phone to connect to i?

Hey, seems to me, you're only a 10bit person. Have you ever did any
homework yourself?

--
Dr Balwinder S "bsd" Dheeman Registered Linux User: #229709
Anu'z Linux@HOME Machines: #168573, 170593, 259192
Chandigarh, UT, 160062, India Gentoo, Fedora, Debian/FreeBSD/XP
Home: http://cto.homelinux.net/~bsd/ Visit: http://counter.li.org/

CptDondo <(E-Mail Removed)> writes:

> Randy Yates wrote:
>> CptDondo <(E-Mail Removed)> writes:
>>
>>> Does anyone know if it is possible to dial in to a linux box with a
>>> cell phone?
>>>
>>> I need to control some equipment with a cell phone, and I'm trying to
>>> figure out an approach - DTMF, or something like ppp, or something
>>> else?
>>>
>>> Can I set up a linux box with a cell modem as a GPRS 'server'? And if
>>> so, how do I get the cell phone to connect to i?
>> I'm not sure why you'd want to establish such a complex system
>> yourself
>> when folks like AT&T, Cingular, SunCom, etc., have already done that for
>> you.
>
> Customer demands... Basically, the machines I'm trying to connect to
> have no way to connect to connect to the web other than via a cell
> phone.

I'm confused - what is the physical interface? How do you connect a
computer to the web with a cell phone? The closest I can come to
making sense of your statement is that you have a modem on the
computer and can establish a connection to the ISP through the
standard POTS interface, but this has nothing to do directly with a
cell phone.
--
% Randy Yates % "And all that I can do
%% Fuquay-Varina, NC % is say I'm sorry,
%%% 919-577-9882 % that's the way it goes..."
%%%% <(E-Mail Removed)> % Getting To The Point', *Balance of Power*, ELO
http://home.earthlink.net/~yatescr

Randy Yates wrote:

> I'm confused - what is the physical interface? How do you connect a
> computer to the web with a cell phone?

GPRS

CptDondo <(E-Mail Removed)> writes:

> Randy Yates wrote:
>
>> I'm confused - what is the physical interface? How do you connect a
>> computer to the web with a cell phone?
>
> GPRS

Are you talking about a device like this:

http://www.easydevices.co.uk/pp/GSM_...DPA_Modem.html

and if so, are you asking if it is possible to initiate a connection to the network
from a remote location?
--
% Randy Yates % "I met someone who looks alot like you,
%% Fuquay-Varina, NC % she does the things you do,
%%% 919-577-9882 % but she is an IBM."
%%%% <(E-Mail Removed)> % 'Yours Truly, 2095', *Time*, ELO
http://home.earthlink.net/~yatescr

On 2007-08-06, CptDondo <(E-Mail Removed)> wrote:

> Does anyone know if it is possible to dial in to a linux box with a cell
> phone?

I used to set up remote systems like that with a Motorola AMPS
bag-phone and a modem interface module. The interface module
provided an RJ-11 jack into which you could plug an analog
modem. It simulated dial-tone for outbound calls and a
ring-signal for inbound calls. It rarely acheived baud rates
abouve 1200 baud, but it worked (if there was AMPS coverage).

> I need to control some equipment with a cell phone, and I'm
> trying to figure out an approach - DTMF, or something like
> ppp, or something else?
>
> Can I set up a linux box with a cell modem as a GPRS 'server'?
> And if so, how do I get the cell phone to connect to i?

With modern, digitial phones, dialing out is generally easy --
I'm not sure you can dial in at all.

The last time I checked, most all Verizon phones will work as
14K baud modems that can be used to connect to either Verizon
as an ISP or any other dial-in modem (e.g. a normal dialup
ISP). You don't have to pay for a data service, it just uses
minutes like a normal call (which for many plans is "free"
nights and weekends). In addition to a relatively low 14K baud
rate, the latency was pretty high (200ms or so), so interactive
stuff like ssh was painful.

NB: IIRC, the 14.4K baud "normal minutes" data access is
unofficial and could go a way at any time without notice.
It's been a couple months since I used it, but it was
working fine last time I tried.

--
Grant Edwards grante Yow! This is a NO-FRILLS
at flight -- hold th' CANADIAN
visi.com BACON!!

normally cell phone companies do not allow you to make cell phone calls
using your cell as a modem, except to their own dialup, for which they
charge an extra monthly fee.

I have a cell phone that I use as a modem with a linux laptop, using
GPRS, it works quite well usually, even when driving on interstate
highways amidst corn fields. It does not work 100% of time, however.
And it does not work very well (sometimes signal goes away in bad
spots), but it does work.

i

On Mon, 06 Aug 2007 09:22:41 -0700, CptDondo <(E-Mail Removed)> wrote:
> Does anyone know if it is possible to dial in to a linux box with a cell
> phone?
>
> I need to control some equipment with a cell phone, and I'm trying to
> figure out an approach - DTMF, or something like ppp, or something else?
>
> Can I set up a linux box with a cell modem as a GPRS 'server'? And if
> so, how do I get the cell phone to connect to i?
>
> Thanks,
>

On 2007-08-07, Ignoramus4185 <(E-Mail Removed)> wrote:

> normally cell phone companies do not allow you to make cell
> phone calls using your cell as a modem, except to their own
> dialup,

Verizon does you can dial up any modem you want.

> for which they charge an extra monthly fee.

Verizon doesn't for 14.4K baud. For high-speed data
connections you pay extra (and have to use Verizon as the ISP).

--
Grant Edwards grante Yow! .. hubub, hubub,
at HUBUB, hubub, hubub, hubub,
visi.com HUBUB, hubub, hubub, hubub.