C.25 Definition of media feature tag g.3gpp.cs2ps-drvcc-orig-pre-alerting

24.2373GPPIP Multimedia (IM) Core Network (CN) subsystem IP Multimedia Subsystem (IMS) service continuityRelease 17Stage 3TS

Media feature-tag name: g.3gpp.cs2ps-drvcc-orig-pre-alerting

ASN.1 Identifier: 1.3.6.1.8.2.24

The g.3gpp.cs2ps-drvcc-orig-pre-alerting media feature tag shall be registered in the IANA Media Feature Tags registry "features.global-tree" sub-registry.

Summary of the media feature indicated by this tag: This media feature-tag when used in a Contact header field of a SIP request or a SIP response indicates that the functional entity sending the SIP message supports the CS to PS dual radio access transfer for originating calls in pre-alerting phase.

Values appropriate for use with this feature-tag: Boolean

The feature-tag is intended primarily for use in the following applications, protocols, services, or negotiation mechanisms: This feature-tag is most useful in a communications application, for describing the capabilities of a device, such as a phone or PDA.

Examples of typical use: Indicating that the user equipment supports the CS to PS dual radio access transfer access transfer for originating calls in pre-alerting phase.

Related standards or documents: 3GPP TS 24.237: "IP Multimedia Subsystem (IMS) Service Continuity; Stage 3"

Security Considerations: Security considerations for this media feature-tag are discussed in subclause 12.1 of IETF RFC 3840 [34].