TmnxMobLiTarget

  • Base type OctetString
  • Range 8 — 8

The data type TmnxMobLiTarget describes the target for the interception. The target can be of type International Mobile Subscriber Identity (IMSI), Mobile Subscriber Integrated Services Digital Network (MSISDN) or International Mobile Equipment Identity (IMEI). IMSI is defined as a number consisting of up to 15 BCD digits. The first 3 digits are the Mobile Country Code (MCC). The next 2 or 3 digits are the Mobile Network Code (MNC). The value of MCC determines whether the MNC is 2 digits or 3 digits. The remaining digits are the Mobile Subscriber Identification Number (MSIN). The internal representation of the IMSI is as follows: Bits 63-62 are reserved. Bits 61-60 indicate the length of the MNC field: 10 indicates a 2-digit MNC while 11 indicates a 3-digit MNC. Bits 59-0 hold the 15 IMSI BCD digits D1-15. When the total number of digits in the IMSI is less than 15, the nibble 0xf is used a filler. IMSI encoding for a 2-digit MNC: 63 55 47 39 0 +-----------+-----------+-----------+-------------------------+ | 0010| MCC1| MCC2| MCC3| MNC1| MNC2| MSIN (up to 10 digits) +-----------+-----------+-----------+-------------------------+ IMSI encoding for a 3-digit MNC: 63 55 47 39 35 0 +-----------+-----------+-----------+-------------------------+ | 0011| MCC1| MCC2| MCC3| MNC1| MNC2| MNC3| MSIN (up to 9 digits) +-----------+-----------+-----------+-------------------------+ Bits 63-56 of the IMSI are carried in octet number 1 of the octet string and bits 7-0 are carried in octet number 8 of the octet string.