I.1 General

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

The Emergency Call Number field is a variable-length UTF-8 (see RFC 3629 [34]) formatted field. The purpose of this field is to encode emergency call number(s) for use within the country where the field is received.

This clause describes the formatting of the Emergency Call Number Unit field used in the Emergency Call Number ANQP-element specified in IEEE Std 802.11 [57].

NOTE: According to IEEE Std 802.11 [57] an ANQP server is not necessarily collocated with an AP. Where the TWAN provides access to multiple PLMNs, where a PLMN has configured the TWAN to provide different emergency numbers compared to another PLMN, it is an implementation option to ensure the Emergency Call Number field includes the emergency numbers configured by the PLMN the UE successfully authenticated and authorized with.