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Andy Neil
08/14/06 01:09
Read: 1542 times

#122184 - All about PDU format
Responding to: Hendryawan's previous message
As Jez says, the definition of the PDU format (and, in fact all the GSM specs) is available for free download:

The link is also given under 'Links'

The spec you require is 03.40, Technical realization of the Short Message Service (SMS):

Or 23.040:

Unfortunately, this spec is somewhat impenetrable! :-(
Nevertheles, you need to download it and have it for reference.

Of course, there is plenty of information available on the web - I found these two most useful:

Note that the 'Length of SMSC info', 'Type of SMSC address', and 'Service centre number' are not part of the PDU itself.

In particular, note that the 'Length of SMSC info' is the length of the entire SMSC information in bytes including the 'Type of SMSC address' - whereas the 'Address Length' for the phone number within the PDU itself is the number of digits in the phone number, not the number of bytes occupied by the field!

List of 27 messages in thread
GSM SMS control      Hendryawan      08/10/06 21:55      
   In the sms request...      Jez Smith      08/10/06 22:18      
      SMS in PDU format      Hendryawan      08/10/06 23:44      
         i found this about pduspy      Jez Smith      08/11/06 01:19      
         So why PDU?      Andy Neil      08/13/06 04:19      
      Not such a good idea      Andy Neil      08/15/06 01:04      
   The Originating Number *is* in the message      Andy Neil      08/13/06 05:50      
      try first        Hendryawan      08/13/06 21:07      
         That's the trouble with using a Phone      Andy Neil      08/14/06 00:11      
         help me with the same      Gaurav Gupta      08/15/06 01:47      
            Getting started      Andy Neil      08/15/06 02:18      
               gsm and 8051      Gaurav Gupta      08/20/06 23:35      
                  Nothing to add      Andy Neil      08/20/06 23:48      
            Butting-in      Andy Neil      08/15/06 02:26      
   All about PDU format      Andy Neil      08/14/06 01:09      
   example data      Hendryawan      08/14/06 18:44      
      Now you're just not trying!      Andy Neil      08/14/06 23:38      
   do experiment      Hendryawan      08/14/06 23:53      
      No experiment!      Andy Neil      08/15/06 00:10      
         wet horses      Jez Smith      08/15/06 01:01      
            silly horse!      Andy Neil      08/15/06 02:31      
      SMS with AT89C51      Jecksons Ben      10/19/06 02:54      
         Off-Topic, vague question      Andy Neil      10/19/06 04:51      
            AT89C51 with GSM      Jecksons Ben      10/20/06 02:16      
               Not here!      Andy Neil      10/20/06 02:45      
   thank you      Hendryawan      08/16/06 21:28      
   about the hardware      Gaurav Gupta      08/20/06 23:56      

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