Question: What is the primary purpose of utilizing existing AT modem commands for a Packet Domain Mobile Terminal (MT) as per 3GPP specifications?
Option 1: To enhance security features for new packet domain applications
Option 2: To provide backwards compatibility with existing communications software
Option 3: To optimize data transfer speeds exclusively for 5G networks
Option 4: To introduce a unified command set for both Circuit Switched and Packet Switched domains
Explanation: The correct answer, Option 2, highlights the main objective of reusing existing AT modem commands for a Packet Domain MT, which is to ensure compatibility with older software applications, facilitating a smoother transition or coexistence. This approach allows devices to work with both new and legacy systems without requiring immediate updates to utilize packet domain services.