Question: In a SIM-ME interface, when a mobile station is in its 'home' network and the secondary initial paging channel (FIRSTCHP p-sec) is absent, what default value should the mobile station use if the primary channel (FIRSTCHP p-pri) is '014E'?
Option 1: '02C4'
Option 2: '02E1'
Option 3: '014D'
Option 4: '0000' (indicating a system-defined or dynamic assignment)
Explanation: According to the specifications for the Initial Paging Channel in the SIM-ME interface, if the primary channel (FIRSTCHP p-pri) is '014E', and the secondary channel (FIRSTCHP p-sec) is absent, the mobile station should default to '02E1'. This ensures compatibility with system B configurations when explicit secondary paging channel information is not provided.