MagTek MagneSafe V5 - Manual (Page 83)

Section 2. Communications
75
DSN – Device Serial Number, this data field will always be fixed at 16 bytes. If the serial
number is less than 15 bytes, it will be left justified. The 16
th
byte will always be set to NULL.
Cryptogram – Encrypted data, the length of which is always a multiple of 8, this field can be
maximum of 120 characters.
Result codes:
0x00 – success
0x02 – Bad Parameters, the Data Len is not supported
0x07 – Security Level < 2, MSCI CMUT was incorrect.