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Cellular Phone Forum / General / GSM / March 2005

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Character from GSM 03.38 not on the mobile

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Michael Kragh Pedersen - 25 Mar 2005 17:19 GMT
Is it at all possible to send characters from the above standard, that
are not in the symbol table on your mobile, by using the hexadecimal or
decimal code or something like that?

Michael K. P.
John Henderson - 25 Mar 2005 20:24 GMT
> Is it at all possible to send characters from the above
> standard, that are not in the symbol table on your mobile, by
> using the hexadecimal or decimal code or something like that?

From the phone's keypad, it's highly unlikely that there's an
alternative mechanism.

If the phone supports GSM 07.05 PDU-mode "AT" commands, then you
can bypass the phone's PDU <=> text interpreter using the
serial port, although the programming required is non-trival.
The GSM 7-bit characters are then packed into hexadecimal form
as per clause 6.1.2.1.1 of GSM 03.08.

John
John Henderson - 25 Mar 2005 20:27 GMT
Earlier, I wrote:

> The GSM 7-bit characters are then packed into hexadecimal form
> as per clause 6.1.2.1.1 of GSM 03.08.

That should read GSM 03.38 of course.

John
Michael Kragh Pedersen - 26 Mar 2005 11:13 GMT
>>Is it at all possible to send characters from the above
>>standard, that are not in the symbol table on your mobile, by
[quoted text clipped - 10 lines]
>
> John

I doubt, it supports that...it's a Nokia 3510i :) So basically that
means, I guess, that there are no ways of doing that :(

Michael K. P.
John Henderson - 26 Mar 2005 20:25 GMT
> I doubt, it supports that [SMS commands from GSM 07.05]...it's
> a Nokia 3510i :) So basically that means, I guess, that there
> are no ways of doing that :(

A quick google search indicates that the 3510i's got an internal
modem.  That implies an "AT" command interpreter, and almost
certain support for GSM 07.05 commands.

You'd need a serial data cable, and some PC SMS software (DIY or
other suitable).  If you're writing your own PDU-mode programs,
you'll need GSM spec 03.40 as well.

John
 
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