Question: In a Cell Broadcast Service (CBS) scenario using GSM 7 bit default alphabet encoding, how does the CBS-Message-Information-Length parameter behave if the last character of user information doesn't terminate at an octet boundary?
Option 1: It indicates the number of octets up to but not including the next octet boundary.
Option 2: It rounds down to the nearest whole octet, potentially truncating user information.
Option 3: It always includes an extra padding octet to ensure alignment.
Option 4: It indicates the number of octets up to the octet boundary immediately following the last GSM 7 bit default alphabet character.
Explanation: When the last character doesn't terminate at an octet boundary in GSM 7 bit default alphabet encoding, the CBS-Message-Information-Length parameter includes all octets up to and including the next full octet boundary after the last character of user information, ensuring efficient data transmission.