J.1 General

24.3023GPPAccess to the 3GPP Evolved Packet Core (EPC) via non-3GPP access networksRelease 18Stage 3TS

This clause describes the retrieval of the Emergency Call Numbers field using DNS procedures.

The UE performs this procedure with a DNS server only, if the DNS server address is acquired from the ePDG using procedures in 3GPP TS 24.302 [156] clause 7.2.2.1 and clause 7.4.1, contained in the CFG_REPLY Configuration payload, and after mutual authentication of the UE and the network.

NOTE: The message carrying the emergency information is sent through the established IPsec tunnel to the 3GPP network.

The related Country based Emergency Numbers FQDN is specified in 3GPP TS 23.003 [3].