Question: In a USIM with eCall Only support, when Services n° 112 and n° 99 are 'available' and Fixed Dialing Numbers (FDN) is enabled, what is the expected content of EFFDNURI for eCall over IMS Emergency Services in E-UTRAN or NG-RAN?
Option 1: EFFDNURI contains all FDN entries with their corresponding MSISDNs.
Option 2: EFFDNURI is empty as eCall numbers are stored in a different file.
Option 3: EFFDNURI contains exactly two entries: the eCall test URI and the eCall reconfiguration URI, which may include MSISDNs encoded as tel URIs.
Option 4: EFFDNURI includes all emergency services numbers (e.g., Service n° 112, Service n° 99) in addition to eCall specific URIs.
Explanation: According to specifications for a USIM with eCall Only support, when IMS Emergency Services are available and FDN is enabled, EFFDNURI contains just two entries for eCall functionality: the eCall test URI and the eCall reconfiguration URI, which can include MSISDNs encoded as tel URIs, ensuring efficient handling of emergency calls in eCall only mode.