Version 1: Release Note 28 November 2014


Pre-conditions None. Detailed Steps



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Pre-conditions


None.
      1. Detailed Steps

        1. Detailed Steps / Sequence

          1. Verifying the UTRN check digit

The PPMID may validate the 20th digit (the UTRN Check Digit) as specified at Section 14.8 (Calculating and Verifying the UTRN Check Digit). Where this check fails, the PPMID shall cease processing the Command and shall inform the consumer of the failure of the check digit.
          1. Command Construction by the PPMID

Where the target Device is a GSME, the PPMID shall construct the Command according to the requirements of Use Case PCS01.

Where the target Device is an ESME, the PPMID shall construct a ZSE Consumer Top Up command.

In all cases:

          1. HAN Only Command Validation by the ESME / GSME

If the ESME / GSME has no PPMID in its Device Log, the ESME / GSME shall apply the requirements of Section 6.2.4.2 and undertake no additional processing.

If the ESME / GSME has a PPMID in its Device Log:



  • if the receiving Device is an ESME, the ESME shall use ZSE cryptographic processes to establish whether the Command was authentically issued by the PPMID that is in its Device Log; or

  • if the receiving Device is a GSME, the GSME shall undertake Command Authenticity and Integrity Verification, as required for a Command of Message Category SME.C.PPMID-GSME to establish whether the Command was authentically issued by the PPMID that is in its Device Log.

If the Command was authentically issued by the PPMID within the Device Log, the ESME / GSME shall apply the requirements of Section 6.2.4.2.

If the Command was authentically issued by the PPMID within the Device Log, the ESME / GSME shall comply with the requirements of Section 14.6.4 (but excluding requirements in Sections 14.6.4.1.1, save that the ESME / GSME shall disregard the 20th digit before undertaking any further steps), and so process the contents of the Command accordingly.


          1. HAN Only Response Construction and Issue

Where the ESME / GSME successfully creates a Remote Party Response to its Supplier, as per the requirements in Section 14.6.5, the ESME / GSME shall also:

  • where the Device is a GSME, construct the HAN Only Response according to the requirements of Use Case PCS01 and send it to the PPMID; or

  • where the Device is an ESME, construct a ZSE Consumer Top Up Response command, and send it to the PPMID.

In all cases the value of the Source of Top up, with its ZSE meaning, shall be 0x02 (IHD).

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