Question: In a USIM application, where Service n° 112 and Service n° 99 are available, FDN is disabled, and eCall with normal calls are supported, what should the last two entries of EFSDNURI contain for eCalls over IMS Emergency Services in E-UTRAN or NG-RAN?
Option 1: The last two entries should contain the emergency services phone numbers (e.g., 112, 911) as dialing strings.
Option 2: These entries are reserved and must be left blank for future use in eCall scenarios.
Option 3: The last two entries shall contain the eCall test URI and the eCall reconfiguration URI respectively, possibly including MSISDNs encoded as tel URIs.
Option 4: They should mirror the first two entries of EFSDNURI for redundancy in emergency situations.
Explanation: According to the specifications for USIM applications, when eCall and normal calls are supported, and IMS Emergency Services are available (indicated by Service n° 112 and Service n° 99 being "available"), the last two entries of EFSDNURI must contain specific URIs for handling eCalls efficiently over PS domain in E-UTRAN or NG-RAN. These include a test URI and a reconfiguration URI, which can encode MSISDNs as tel URIs to facilitate seamless communication in emergency scenarios. This setup ensures compatibility with IMS Emergency Services, providing a robust framework for handling eCalls.