Question: What is the correct format for constructing an OAM System Realm/Domain from a given IMSI, considering the MCC and MNC lengths?
Option 1: oam.mcc<MCC>-mnc<MNC>.org where <MNC> is always 2 digits, padding with zero if necessary.
Option 2: oam.mnc<MNC>.mcc<MCC>.3gppnetwork.org where <MNC> and <MCC> are derived from the IMSI, with <MNC> being either 2 or 3 digits, padded with a zero for 2-digit MNCs.
Option 3: oam.<IMSI>.3gppnetwork.org using the full IMSI as part of the domain name.
Option 4: mcc<MCC>.mnc<MNC>.oam.3gppnetwork.org with <MNC> always assumed to be 3 digits.
Explanation: The correct construction of an OAM System Realm/Domain, as per the specifications, involves deriving the MCC and MNC from the IMSI, ensuring the MNC is correctly represented as either 2 or 3 digits (padding with a zero for 2-digit MNCs), and formatting it as oam.mnc<MNC>.mcc<MCC>.3gppnetwork.org. This ensures consistency and accuracy in identifying the operator’s PLMN within the OAM system.