This TS defines the stage 2 description for the Iq reference point (IMS Application Level Gateway – IMS Access Gateway). The stage 2 shall cover the information flow between the P-CSCF (IMS-ALG) and IMS-AGW. The protocol used over the Iq interface is the gateway control protocol according ITU-T Recommendation H.248 (which is specified for Iq by an H.248 profile according
TS 29.334).
