Re: GSM modem comunicating.

Posted: 07-11-2003, 07:00 PM

marcus@myrealbox.com

Posts: n/a

On Fri, 11 Jul 2003 22:09:54 +1000, "Bill" <vasilis0@oputshome.com.au>
wrote:

>Hello everybody, I would like to ask if anyone knows how to communicate with
>a device connected to a GSM modem. I am able to phone in and connect to the
>GSM modem but for some reason I can not access the device that is connected
>to it. Which in this case is a GPS device. Anyone know what could be going
>wrong. Take note I am a beginner with GSM modems.

Can you provide more info about what you want to achieve and what
you're currently doing?

Responses to "Re: GSM modem comunicating."

John Henderson

Posts: n/a

Re: GSM modem comunicating.

Posted: 07-12-2003, 11:41 PM

"Bill" wrote:

> Well what I'm doing is using a gps to connect to a gsm modem. I
> am able to communicate with the gps when it is connected to my
> computer via a serial link, and the same goes for the gsm
> modem. When they are connected to each other I am able to call
> the gsm modem but for some reason I can't talk to the gps?

What are you using to dial the GSM modem attached to the GPS?

Does that GSM modem have a dedicated data number (different from
its default voice number)?

If you're in Australia (as your address suggests), what GSM
carrier(s) are you using?

Is the GSM modem configured to auto-answer after a certain number
of rings?

Is this modem a GSM terminal, or a GSM phone with an in-built
modem? If it's a phone, are you using a genuine data cable
supplied by the phone manufacturer?

> I use the software that came with the gps to call the gsm. It
> supports modem connection. They both use the same board rate
> but I can't seem to link the two.
>
> I am also sure that I do make a connection with the gsm modem
> when I call it but I can't connect to the gps through the
> modem.

What makes you certain you've got a data connection?

> They are linked by RS 232.

There can be a lot of fine detail to get right, and these are
introductory questions.

John

Bill

Posts: n/a

Re: GSM modem comunicating.

Posted: 07-14-2003, 11:47 AM

Well i worked it out. I wasn't useing null modem.
"John Henderson" <jhenRemoveThis@talk21.com> wrote in message
news:beq31l$83ikh$1@ID-83062.news.uni-berlin.de...
> "Bill" wrote:
>
> > Well what I'm doing is using a gps to connect to a gsm modem. I
> > am able to communicate with the gps when it is connected to my
> > computer via a serial link, and the same goes for the gsm
> > modem. When they are connected to each other I am able to call
> > the gsm modem but for some reason I can't talk to the gps?
>
> What are you using to dial the GSM modem attached to the GPS?
>
> Does that GSM modem have a dedicated data number (different from
> its default voice number)?
>
> If you're in Australia (as your address suggests), what GSM
> carrier(s) are you using?
>
> Is the GSM modem configured to auto-answer after a certain number
> of rings?
>
> Is this modem a GSM terminal, or a GSM phone with an in-built
> modem? If it's a phone, are you using a genuine data cable
> supplied by the phone manufacturer?
>
> > I use the software that came with the gps to call the gsm. It
> > supports modem connection. They both use the same board rate
> > but I can't seem to link the two.
> >
> > I am also sure that I do make a connection with the gsm modem
> > when I call it but I can't connect to the gps through the
> > modem.
>
> What makes you certain you've got a data connection?
>
> > They are linked by RS 232.
>
> There can be a lot of fine detail to get right, and these are
> introductory questions.
>
> John
>
>

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