weird problem

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Andreas Ruetten - 19 Apr 2005 15:54 GMT

Hello,
we use a embedded board with a tellit GSM862 GSM Modem.
With this modem we sen SMS to some cellular phone.

One combination makes a weird problem .

SMS -> Nokia 6310 -> OK
SMS -> Nokia 6600 -> id doesn't receive any SMS from the tellit modem.

If i take the chipcard from the 6600 and put it in the 6310,
it receives the former send SMS.

From 6310 to 6600 there is no SMS Problem.

It seems, that the Nokia refuses SMS from a tellit engine.

Any Hints ?

Andreas

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John Henderson - 19 Apr 2005 18:01 GMT

> Hello,
> we use a embedded board with a tellit GSM862 GSM Modem.
[quoted text clipped - 12 lines]
>
> It seems, that the Nokia refuses SMS from a tellit engine.

What software are you using to send SMSs via the modem? Is it
software you've written? If it means anything to you, are you
using PDU-mode or text-mode to control the modem? If it's
PDU-mode and your own software, can you post a generated PDU
string with a dummy destination address? If not, do you have a
data cable for the 6310 so that you can see what's in the
received message headers?

Could there be something unusual in the message headers? Are
DCS and PID set to "00"? Is the UDHI bit or the SRR bit set?
Can you configure any of these things?

Does the modem receive self-sddressed SMSs OK? Because SMS is
store-and-forward, you should always be able to do this too.

John

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Andreas Ruetten - 19 Apr 2005 18:39 GMT

> What software are you using to send SMSs via the modem? Is it
> software you've written?

Yes, and it runs with several network provider and cellular ( only probs
with 6600 )
If it means anything to you, are you

> using PDU-mode or text-mode to control the modem?

Text mode !
If it's

> PDU-mode and your own software, can you post a generated PDU
> string with a dummy destination address? If not, do you have a
[quoted text clipped - 9 lines]
>
> John

Andreas

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John Henderson - 19 Apr 2005 21:38 GMT

> Text mode !

What are the modem's text-mode parameters (FO, VP, PID and DCS)?
That is to say, what does

AT+CSMP?

return?

John

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John Henderson - 19 Apr 2005 22:10 GMT

> Text mode !

A further thought:

Are you using "AT+CMGS" to send these messages? If so, how are
you terminating the

AT+CMGS=<da>

command line (prior to entering the text)? You should be using
a single <cr> character _without_ a <lf>. A common mistake is
to use a standard end-of-line function consisting of a <cr><lf>
pair, and the result of doing that is undefined.

John

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John Henderson - 19 Apr 2005 18:19 GMT

> If i take the chipcard from the 6600 and put it in the 6310,
> it receives the former send SMS.

Are the 6310 and the 6600 on the same network? If not, have you
tried switching the 6600 off and on again while it's waiting
for a sent SMS?

John

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Andreas Ruetten - 19 Apr 2005 18:34 GMT

>>If i take the chipcard from the 6600 and put it in the 6310,
>>it receives the former send SMS.
>
> Are the 6310 and the 6600 on the same network?

Yes, they are in the same room.
If not, have you

> tried switching the 6600 off and on again while it's waiting
> for a sent SMS?
>
> John

Thanks

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Meff No - 19 Apr 2005 21:16 GMT

Please feel free to check the message class parameters and the parameters
on AT+CNMI . More about SMS on http://www.gsm-modem.de/sms.html .

Reply to this Message

John Henderson - 19 Apr 2005 21:54 GMT

> Please feel free to check the message class parameters and the
> parameters on AT+CNMI . More about SMS on
> http://www.gsm-modem.de/sms.html .

"+CNMI" is relevant to the receiving device only. Andreas would
have to query that setting on the 6600 for the result to have
any bearing on this problem.

John

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