Question: In a telecom network, when an IMS (IP Multimedia Subsystem) emergency session is active over EPS (Evolved Packet System) or GPRS (General Packet Radio Service) using emergency bearer services, what should be avoided regarding handover to another access network?
Option 1: Handover to E-UTRAN (Evolved Universal Terrestrial Radio Access Network) should not be performed.
Option 2: Handover to UTRAN (Universal Terrestrial Radio Access Network) should not be performed.
Option 3: PS (Packet Switched) handover to GERAN (GSM/EDGE Radio Access Network) should not be performed.
Option 4: Inter-RAT (Radio Access Technology) handover between UTRAN and E-UTRAN should not be performed.
Explanation: This is because support for Packet Core emergency bearer services over GERAN networks is limited, thus to maintain continuity of service for IMS emergency sessions over EPS or GPRS, handover to a network without such support (GERAN) should be avoided, ensuring uninterrupted emergency communication.