This document describes the protocol to be used on the IBCF–TrGW and the CS-IBCF – CS-TrGW Ix
The basis for this protocol is the H.248 protocol as specified in ITU-T. The Profile provides MG control function for IMS and CS Border Control.
The IMS architecture is described in TS 23.228
. The underlying reference model and stage 2 information is described in Annex I of TS 23.228
and in TS 29.162
. The CS architecture is described in Annex A of TS 29.235
This specification describes the application of H.248 Ix profile for both Ix
interfaces. Required extensions use the H.248 standard extension mechanism. In addition certain aspects of the base
protocol H.248 are not needed for this interface and thus excluded by this profile.