L.1 General
23.1673GPPIP Multimedia Subsystem (IMS) emergency sessionsRelease 17TS
This annex includes additional clarifications when the IP-CAN corresponds to a non-3GPP access to 5GC.
Trusted and untrusted non-3GPP access to 5GC for emergency sessions are supported.
The UE may issue an Emergency session over non-3GPP access to 5GC only when 3GPP access for emergency call is not possible or available (e.g. no 3GPP coverage).
Further details on the procedures defined for non-3GPP access to 5GC support of support emergency sessions are defined in TS 23.502 [49].