Question: In A/Gb mode, a Mobile Station (MS) attached to both Packet Switched (PS) and Circuit Switched (CS) domains, but can only operate one set of services at a time, is classified as which of the following?
Option 1: Class-A MS - Simultaneous PS and CS domain service operation
Option 2: Class-B MS - Alternating PS and CS domain service operation
Option 3: Class-B MS - Single-service operation at a time for both PS and CS domains
Option 4: Class-C MS - Exclusive PS domain attachment with periodic CS domain polling
Explanation: This describes an MS attached to both PS and CS domains but can only operate either PS or CS services at any given time, highlighting the nuances of service management in telecom networks, crucial for understanding device interaction with network infrastructure, impacting service delivery and user experience.