Title: Moshe Maeir
It all boils down to the carriers business model. In the states the carriers charge for receiving SMS and in many other countries they charge for sending.
I am not aware of any countries where you can send and receive for free.  The mobile carriers control access to their network completely, that is why they have such insane profit margins!

Steve Totaro wrote:
CF

Technically, sending is free.  But I assume he is sending it to himself.  Sure sending SMS is free through an email gateway but receiving it is not.  So there is no such thing as free.  Alistair gets the score on the SMS issue.

Sending data in DTMF, altered CallerID, or possibly a dialup modem would work.  Heck, voice recognition may work.  It all depends on the definition and purpose of the "couple of packets" that the OP is trying to send over GSM.

Thanks,
Steve

C F wrote:
Alistair, I'm sorry to inform you that your imagination doesn't count
here, as it indeed doesnt' cost any money (meaning it's really free)
to send data across US GSM networks, using their email gateways.

On 3/12/07, Alistair Cunningham <[EMAIL PROTECTED]> wrote:
Michael Welter wrote:
> Here in the states, we get charged for each SMS message.  What I'm
> looking for is a no-cost method to send a little data over a GSM voice
> channel.

Michael,

I can't imagine the GSM operators will allow you to send data across
their networks at no cost, in any form.

Alistair Cunningham
+1 888 468 3111
+44 20 799 39 799
sip:[EMAIL PROTECTED]
http://integrics.com/
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Moshe Maeir


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