K.1 Scope

I.2 Originating, transit and interconnection routeing procedures

I.1A General

I.4 Loopback routeing procedures

I.3 Providing IMS application services in support of transit & interconnection traffics

H.5 Use of circuit-switched domain

H.4 3GPP specific encoding for SIP header field extensions

I.1 Scope

H.3 Application usage of SIP

H.1 Scope