Summary - Q Suppl. 72 (11/2025) - Signalling requirements for IP multimedia subsystem (IMS) emergency call in support of multiple access

Supplement 72 to the ITU-T Q-series Recommendations specifies the signalling requirements for Internet protocol (IP) multimedia subsystem (IMS) emergency call in support of multiple access types, including fixed broadband, wireless fidelity (Wi-Fi), fourth generation (4G) and fifth generation (5G) networks.