This conversion tool has been very useful when resolving troubles and developing SMSTools3. Now I have included it here as an enhanced version which contains more features and is more usable.

PDU Converter is based on work of Swen-Peter Ekkebus, Milan Chudik and Andrew Alexander. The latest version of the original converter can be found at rednaxela.net.

Change history:

06.06.2017

• Fixed handling of TP-DCS when coding group bits are 1111xxxx.

15.01.2017

• < and > are now shown in a browser.

18.05.2011

• Recurring and starting spaces in message text are now shown in a browser.

06.04.2011

• Fixed handling of TP-DCS when coding group bits are 1111xxxx.

24.03.2011

• Added index column to the user data translation.

09.08.2010

• Added hexadecimal dump for 8bit messages.

23.07.2010

• Added "Type Of Address" selection.

23.05.2010

• Added handling for pdu= query variable. (works with topic.php?id=288&pdu=...)

13.05.2010

• Result code of a status report is explained.

22.04.2010

• Fix: The modified code did not show if a receipt was requested.

11.04.2010

• USSD Entry/Display now supports UCS2. Alphabet is not detected from the Cell Broadcast PDU, use radio buttons to select alphabet.

10.04.2010

• Type Of Address is explained.
• User Data Header is extracted from the PDU and shown as a hex string.
• Fixed incorrectly taken discharge timestamp in status report. Changed all timezone handling.

09.04.2010

• Initial version here in SMSTools3 Community.
• New layout, user friendly with long PDU's.
• Handling for extended characters (encode and decode).
• Update counting when alphabet size is changed.
• Plain User Data is created using USSD packing character.
• Can decode GSM 7bit packed (USSD) User Data.
• Can decode Cell Broadcast PDU (7bit).
• etc...

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NOTE: As this is a "tool" topic, I have locked it. If you have any questions, comments or feedback, feel free to create a new topic.