C.12A Definition of feature-capability indicator g.3gpp.ti

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

Feature-capability indicator name: g.3gpp.ti

Summary of the feature indicated by this feature-capability indicator:

This feature-capability indicator when used in a Feature-Caps header field as specified in IETF RFC 6809 [60] in SIP INVITE request or SIP response to the SIP INVITE request indicates the capability of associating a CS call with dialog created by the SIP INVITE request.

Feature-capability indicator specification reference:

3GPP TS 24.237, http://www.3gpp.org/ftp/Specs/archive/24_series/24.237/

Values appropriate for use with this feature-capability indicator:

String with an equality relationship. The value is the transaction identifier specified in figure 11.9 and table 11.3 of 3GPP TS 24.007 [75] encoded by hexadecimal digits following the syntax as described in table C.12A-1 for g.3gpp.ti-value. Each octet of the figure 11.9 of 3GPP TS 24.007 [75] is encoded by two hexadecimal digit, first of which represents the bits 8 – 5 of the octet. The transaction identifier flag is set as sent by the MSC server in CS signalling of the associated CS call.

Table C.12A-1: ABNF syntax of string values of the g.3gpp.ti feature-capability indicator

g.3gpp.ti-value = "<" HEXDIG HEXDIG *( HEXDIG HEXDIG ) ">"

Examples of typical use: Indicating capability of associating a CS call with dialog created by the SIP INVITE request.

Security Considerations: Security considerations for this feature-capability indicator are discussed in clause 9 of IETF RFC 6809 [60].