Hi Alma,
3GPP IM-SSF will be required to interwork CAMEL services with a 3GPP IMS Network.
Flow will be:-
S-CSCF —- IM-SSF —- gsmSCF (CAMEL node)
IM-SSF which also acts like gsmSSF needs to interact with gsmSCF for the processing of CAMEL related calls. This interface used by IM-SSF to send the request for instructions to the gsmSCF. Via this interface gsmSCF controls the IM session in a certain
IM-SSF. This interface is based on CAP – CAMEL Application Part (e.g. CAP V2).
IM-SSF will have a “parser” component that can take SIP messages and parameters and map
to the ISC interface (IM-SSF – gsmSCF).
VBR/ Wallis Dudhnath
Reference:-
3GPP 23.218 IP Multimedia Subsystem (IMS)
3GPP 23.228 IMS Session Handling