The present document specifies the CAMEL Application Part (CAP) supporting the fourth phase of the network feature Customized Applications for Mobile network Enhanced Logic for IP Multimedia CN subsystems. CAP is based on a sub-set of the ETSI Core INAP CS-2 as specified by EN 301 140-1 
. Descriptions and definitions provided by EN 301 140-1 
are directly referenced by this standard in case no additions or clarifications are needed for the use in the CAP.
The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
For a specific reference, subsequent revisions do not apply.
For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
ETSI ETS 300 287-1: "Integrated Services Digital Network (ISDN); Signalling System No.7; Transaction Capabilities (TC) version 2; Part 1: Protocol specification [ITU-T Recommendations Q.771 to Q.775 (1993), modified]".
ETSI EN 300 356-1: "Integrated Services Digital Network (ISDN); Signalling System No.7; ISDN User Part (ISUP) version 3 for the international interface; Part 1: Basic services [ITU T Recommendations Q.761 to Q.764 (1997), modified]".
ETSI ETS 300 374-1:"Intelligent Network (IN); Intelligent Network Capability Set 1 (CS1); Core Intelligent Network Application Protocol (INAP); Part 1: Protocol specification".
ETSI EN 301 140-5: "Intelligent Network (IN); Intelligent Network Application Protocol (INAP); Capability Set 2 (CS2); Part 1: Protocol Specification".
ITU T Recommendation Q.763: "Formats and codes of the ISDN user part of Signalling System No.7".
ITU T Recommendation X.880 | ISO/IEC 9072 1: "Information technology - Remote Operations: Concepts, model and notation".
ITU-T Recommendation Q.713: "Specifications of Signalling System No.7; SCCP formats and codes".
ITU-T Recommendation Q.773: "Specifications of Signalling System No.7; Transaction capabilities formats and encoding".
: "Digital cellular telecommunications system (Phase 2+); Mobile Application Part (MAP) specification (3GPP TS 29.002) Rel-99".
: " Customised Applications for Mobile network Enhanced Logic (CAMEL) Phase 4 - Stage 2 IM CN Interworking".
: " Customised Applications for Mobile network Enhanced Logic (CAMEL) - Phase 3; CAMEL Application Part (CAP) Specification - Release 99".
"SDP: Session Description Protocol".
For the purposes of the present document, the following abbreviations apply:
Abstract Syntax Notation One
Basic Call State Model
CAMEL Application Part
Capability Set 1
Capability Set 2
CAMEL Subscription Information
Event Detection Point
Event Detection Point - Notification
Event Detection Point - Request
Finite State Model
Service Control Function
GSM Specialized Resource Function
IP Multimedia Subsystems
IP Multimedia Subsystem SSF
Integrated Services Digital Network
ISDN User Part
Multimedia Resource Function Controller
Mobile services Switching Centre
Originating CAMEL BCSM for IMS
Protocol Data Unit
Point In Call
Public Land Mobile Network
Remote Operations Service
Request Report BCSM Event
Service Switching Function
Signalling Connection Control Part
Service Control Point
System Description Language
Service Logic Program
Signalling System no. 7
IM-SSF Management Entity
Service Switching Point
Transaction Capabilities Application Part
Trigger Detection Point
Trigger Detection Point - Request
Terminating CAMEL BCSM for IMS
The CAP stage 3 specification for IMS re-uses the ASN.1 definitions of CAP version 3 as specified in 3GPP Rel-99 TS 29.078
with modifications for CAMEL/IMS interworking. A new Application Context has been created for IMS for Release 5.
For general specifications including lower layer services (i.e. TC and SCCP procedures) , refer to specifications found in TS 29.078
For IMS, the MRFC plays the role of a gsmSRF. The CAP operations sent between the gsmSCF and the MRFC are sent via the IM-SSF. The IM-SSF shall map the CAP operations intended for the MRFC into a SIP based protocol and sent to the MRFC via the S-CSCF. Standardization of the MRFC interface via S-CSCF is outside the scope of this specification.