3. The IRD then askes to send 09 bytes with 48 4C 00 00 09
>D1 4C 00 00 09
<4c acknowledges="" card="" instruction="" p="">>IN IN IN IN IRD Serial Number
>02 00 00 D8 02 unknown
<90 20="" correctly="" married="" p="">
If the card belongs to this box it replies 90 20 (OK).
If the card does not belong to this box it replies 90 00 (Not OK).
If the card has the fuse byte set but is previously unmarried, this command writes the IRD number to the card, thereby completing the marriage (sw1/2 = 90 a1). If the card is deactivated and this command arrives the IRD Serial Number is written to the cards EEPROM too (sw1/2 = 90 20).