1、 Standard ECMA-203 4th Edition - December 2001 Standardizing Information and Communication Systems Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Call Intrusion Supplementary Service Phone: +41 22 849.60.00 - Fax: +41 22 849.60.01 - URL: http:/www.ecma.ch - Interne
2、t: helpdeskecma.ch . Standard ECMA-203 4th Edition - December 2001 Standardizing Information and Communication Systems Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Call Intrusion Supplementary Service (QSIG-CI) Phone: +41 22 849.60.00 - Fax: +41 22 849.60.01 - UR
3、L: http:/www.ecma.ch - Internet: helpdeskecma.ch IW Ecma-203.doc 15-01-02 15,14 . Brief History This Standard is one of a series of ECMA Standards defining services and signalling protocols applicable to Private Integrated Services Networks (PISNs). The series uses ISDN concepts as developed by ITU-
4、T and conforms to the framework of International Standards for Open Systems Interconnection as defined by ISO/IEC. This particular Standard specifies the signalling protocol for use at the Q reference point in support of the Call Intrusion supplementary service. The protocol defined in this Standard
5、 forms part of the PSS1 protocol (informally known as QSIG). This Standard is based upon the practical experience of ECMA member companies and the results of their active and continuous participation in the work of ISO/IEC JTC1, ITU-T, ETSI and other international and national standardization bodies
6、. It represents a pragmatic and widely based consensus. Compared to the 1st and 2nd Editions of Standard ECMA-203 (published by ECMA in December 1993 and December 1994 respectively), the 3rd Edition incorporated changes in order to achieve complete alignment with International Standard ISO/IEC 14846
7、:1996(E) published by ISO/IEC in September 1996. Compared to the 3rd Edition of Standard ECMA-203 (published by ECMA in June 1997), this 4th Edition incorporates migration to ASN.1 version 1997. Adopted as 4th Edition of Standard ECMA-203 by the General Assembly of December 2001. - i - Table of cont
8、ents 1 Scope 1 2 Conformance 1 3 References (normative) 1 4 Definitions 2 4.1 External definitions 2 4.2 Other definitions 3 4.2.1 Busy 3 4.2.2 Conference type connection 3 4.2.3 Impending intrusion warning notification 3 4.2.4 Isolation 3 4.2.5 Path retention 3 4.2.6 Served User PINX 3 4.2.7 Wanted
9、 user 3 4.2.8 Unwanted user 3 4.2.9 Unwanted User PINX 3 4.2.10 Wait on busy 3 5 Acronyms 4 6 Signalling protocol for the support of SS-CI 4 6.1 SS-CI description 4 6.2 SS-CI operational requirements 4 6.2.1 Requirements on an Originating PINX 4 6.2.2 Requirements on a Terminating PINX 4 6.2.3 Requi
10、rements on a Transit PINX 4 6.2.4 Requirements on an Unwanted User PINX 5 6.3 SS-CI coding requirements 6 6.3.1 Operations 6 6.3.2 Notifications 9 6.3.3 Information elements 9 6.3.4 Messages 10 6.4 SS-CI state definitions 10 6.4.1 States at the Originating PINX 10 6.4.2 States at the Terminating PIN
11、X 11 6.5 SS-CI signalling procedures for activation, deactivation and registration 11 6.6 SS-CI signalling procedures for invocation and operation 11 6.6.1 Actions at the Originating PINX 11 6.6.2 Actions at the Terminating PINX 14 6.6.3 Actions at the Unwanted User PINX 18 6.6.4 Actions at a Transi
12、t PINX 18 - ii - 6.7 SS-CI impact of interworking with public ISDNs 18 6.8 SS-CI impact of interworking with non-ISDNs 18 6.9 Protocol interactions between SS-CI and other supplementary services and ANFs 18 6.9.1 Interaction with Calling Name Identification Presentation (SS-CNIP) 19 6.9.2 Interactio
13、n with Connected Name Identification Presentation (SS-CONP) 19 6.9.3 Interaction with Call Completion to Busy Subscriber (SS-CCBS) 19 6.9.4 Interaction with Call Completion on No Reply (SS-CCNR) 19 6.9.5 Interaction with Call Transfer (SS-CT) 19 6.9.6 Interaction with Call Forwarding Unconditional (
14、SS-CFU) 19 6.9.7 Interaction with Call Forwarding Busy (SS-CFB) 20 6.9.8 Interaction with Call Forwarding No Reply (SS-CFNR) 20 6.9.9 Interaction with Call Deflection (SS-CD) 20 6.9.10 Interaction with Path Replacement (ANF-PR) 20 6.9.11 Interaction with Call Offer (SS-CO) 22 6.9.12 Interaction with
15、 Do Not Disturb (SS-DND) 22 6.9.13 Interaction with Do Not Disturb Override (SS-DNDO) 22 6.10 SS-CI parameter values (timers) 22 6.10.1 Timer T1 22 6.10.2 Timer T2 22 6.10.3 Timer T3 22 6.10.4 Timer T4 22 6.10.5 Timer T5 23 6.10.6 Timer T6 23 Annex A - Signalling protocol for the support of Path Ret
16、ention 25 Annex B - Protocol Implementation Conformance Statement (PICS) proforma 35 Annex C - Examples of message sequences 45 Annex D - Specification and Description Language (SDL) representation of procedures 53 Annex E - Imported ASN.1 definitions 68 Annex F - ASN.1 definitions according to ITU-
17、T Recs. X.208 / X.209 70 1 Scope This Standard specifies the signalling protocol for the support of the Call Intrusion supplementary service (SS-CI) at the Q reference point between Private Integrated services Network eXchanges (PINXs) connected together within a Private Integrated Services Network
18、(PISN). SS-CI is a supplementary service which, on request from the calling user, enables the calling user to establish communication with a busy called user by breaking into an established call between the called user and a third user (unwanted user). The Q reference point is defined in ECMA-133. S
19、ervice specifications are produced in three stages and according to the method specified in ETS 300 387. This Standard contains the stage 3 specification for the Q reference point and satisfies the requirements identified by the stage 1 and stage 2 specifications in ECMA-202. The signalling protocol
20、 for SS-CI operates on top of the signalling protocol for basic circuit switched call control, as specified in ECMA-143, and uses certain aspects of the generic procedures for the control of supplementary services specified in ECMA-165. This Standard also specifies additional signalling protocol req
21、uirements for the support of interactions at the Q reference point between SS-CI and other supplementary services and ANFs. NOTE 1 Additional interactions that have no impact on the signalling protocol at the Q reference point can be found in the relevant stage 1 specifications. This Standard is app
22、licable to PINXs which can interconnect to form a PISN. 2 Conformance In order to conform to this Standard, a PINX shall satisfy the requirements identified in the Protocol Implementation Conformance Statement (PICS) proforma in annex B. 3 References (normative) The following standards contain provi
23、sions which, through reference in this text, constitute provisions of this Standard. All standards are subject to revision, and parties to agreements based on this Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. In the cas
24、e of references to ECMA Standards that are aligned with ISO/IEC International Standards, the number of the appropriate ISO/IEC International Standard is given in brackets after the ECMA reference. ECMA-133 Private Integrated Services Network (PISN) - Reference Configuration for PISN Exchanges (PINX)
25、 (International Standard ISO/IEC 11579-1) ECMA-142 Private Integrated Services Network (PISN) - Circuit-mode 64 kbit/s Bearer Services - Service Description, Functional Capabilities and Information Flows (International Standard ISO/IEC 11574) ECMA-143 Private Integrated Services Network (PISN) - Cir
26、cuit-mode Bearer Services - Inter-Exchange Signalling Procedures and Protocol (International Standard ISO/IEC 11572) ECMA-165 Private Integrated Services Network (PISN) - Generic Functional Protocol for the Support of Supplementary Services - Inter-Exchange Signalling Procedures and Protocol (Intern
27、ational Standard ISO/IEC 11582) ECMA-174 Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Call Diversion Supplementary Services (International Standard ISO/IEC 13873) ECMA-175 Private Integrated Services Network (PISN) - Specification, Functional Model and Informatio
28、n Flows - Path Replacement Additional Network Feature (International Standard ISO/IEC 13863) - 2 - ECMA-176 Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Path Replacement Additional Network Feature (International Standard ISO/IEC 13874) ECMA-178 Private Integrated
29、 Services Network (PISN) - Inter-Exchange Signalling Protocol - Call Transfer Supplementary Services (International Standard ISO/IEC 13869) ECMA-192 Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Call Offer Supplementary Service (International Standard ISO/IEC 1484
30、3) ECMA-194 Private Integrated Services Network (PISN) - Inter-Exchange signalling protocol - Do not disturb and do not disturb override supplementary services (International Standard ISO/IEC 14844) ECMA-202 Private Integrated Services Network (PISN) - Specification, Functional Model and Information
31、 Flows - Call Intrusion Supplementary Service (International Standard ISO/IEC 14845) ETS 300 387 Private Telecommunication Network (PTN); Method for the specification of basic and supplementary services (1994) ITU-T Rec. I.112 Vocabulary of terms for ISDNs (1993) ITU-T Rec. I.210 Principles of telec
32、ommunication services supported by an ISDN and the means to describe them (1993) ITU-T Rec. Q.950 Supplementary services protocols, structure and general principles (2000) ITU-T Rec. Z.100 Specification and description language (1999) 4 Definitions For the purposes of this Standard, the following de
33、finitions apply. 4.1 External definitions This Standard uses the following terms defined in other documents: Application Protocol Data Unit (APDU) (ECMA-165) Basic Service (ITU-T Rec. I.210) Call, Basic Call (ECMA-165) Coordination Function (ECMA-165) Connection (ECMA-175) Cooperating PINX (ECMA-176
34、) Established call (ECMA-202) Forced release (ECMA-202) Incoming Gateway PINX (ECMA-143) Inter-PINX link (ECMA-143) Interpretation APDU (ECMA-165) Intruding call (ECMA-202) Network Facility Extension (NFE) (ECMA-165) Notification (ECMA-165) Originating PINX (ECMA-143) Outgoing Gateway PINX (ECMA-143
35、) Private Integrated Services Network (PISN) (ECMA-133) - 3 - Private Integrated services Network eXchange (PINX) (ECMA-133) Rerouteing PINX (ECMA-174) Served user (ECMA-202) Signalling (ITU-T Rec. I.112) Supplementary Service (ITU-T Rec. I.210) Supplementary Services Control Entity (ECMA-165) Termi
36、nating PINX (ECMA-143) Transit PINX (ECMA-143) User (ECMA-142) 4.2 Other definitions 4.2.1 Busy A property of a user for whom either a Network Determined User Busy or User Determined User Busy condition exists. 4.2.2 Conference type connection A connection between the served user, the wanted user an
37、d the unwanted user, where all users have user information connection with each other. 4.2.3 Impending intrusion warning notification A notification provided before communication is established between the served user and the wanted user. 4.2.4 Isolation The breaking of the user information connecti
38、on to and from the unwanted user during intrusion. 4.2.5 Path retention The retaining of the network connection between the Originating PINX and the Terminating PINX so that a supplementary service (such as SS-CI) can be invoked without establishing a new connection. 4.2.6 Served User PINX The PINX
39、serving the served user. 4.2.7 Wanted user The called user in the intruding call. NOTE 2 This user is known as user B in ECMA-202. 4.2.8 Unwanted user The user other than the wanted user in the established call. NOTE 3 This user is known as user C in ECMA-202. 4.2.9 Unwanted User PINX The PINX of th
40、e unwanted user. 4.2.10 Wait on busy A condition in which the intruding call is disconnected from the wanted user and is waiting for the wanted user to become not busy. - 4 - 5 Acronyms ANF Additional Network Feature APDU Application Protocol Data Unit ASN.1 Abstract Syntax Notation no. 1 CICL Call
41、Intrusion Capability Level CIPL Call Intrusion Protection Level ISDN Integrated Services Digital Network NFE Network Facility Extension PICS Protocol Implementation Conformance Statement PINX Private Integrated services Network eXchange PISN Private Integrated Services Network SDL Specification and
42、Description Language SS-CI Call Intrusion supplementary service WOB Wait On Busy 6 Signalling protocol for the support of SS-CI 6.1 SS-CI description SS-CI is a supplementary service which, on request from the calling user, enables the calling user to establish communication with a busy called user
43、breaking into an established call between the called user and a third user (unwanted user). SS-CI is applicable to all circuit mode basic services defined in ECMA-142. 6.2 SS-CI operational requirements 6.2.1 Requirements on an Originating PINX Call establishment procedures for the outgoing side of
44、an inter-PINX link and call release procedures, as specified in ECMA-143, shall apply. Generic procedures for the call-related control of supplementary services, as specified in ECMA-165 for an End PINX, shall apply. In addition, the generic procedures for notification, as specified in ECMA-165 for
45、an End PINX, shall apply. 6.2.2 Requirements on a Terminating PINX Call establishment procedures for the incoming side of an inter-PINX link and call release procedures, as specified in ECMA-143, shall apply. Generic procedures for the call-related control of supplementary services, as specified in
46、ECMA-165 for an End PINX, shall apply. In addition, the generic procedures for notification, as specified in ECMA-165 for an End PINX, shall apply 6.2.3 Requirements on a Transit PINX Basic call procedures, as specified in ECMA-143 for a Transit PINX, shall apply. Generic procedures for the call-rel
47、ated control of supplementary services, as specified in ECMA-165 for a Transit PINX, shall apply. In addition, the generic procedures for notification, as specified in ECMA-165 for a Transit PINX, shall apply. For SS-CI the requirements are limited to the passing on of Facility information elements
48、for which the destination, as indicated in the NFE, is not the Transit PINX. - 5 - 6.2.4 Requirements on an Unwanted User PINX Generic procedures for the call-related control of supplementary services, as specified in ECMA-165 for an End PINX, shall apply. In addition, the generic procedures for not
49、ification, as specified in ECMA-165 for an End PINX, shall apply. - 6 - 6.3 SS-CI coding requirements 6.3.1 Operations The operations defined in Abstract Syntax Notation number 1 (ASN.1) in table 1 shall apply. The notation is in accordance with ITU-T Rec. X.680 and X.690. The ITU-T Rec. X.208 and X.209 superseded version is in annex F. Table 1 - Operations in support of SS-CI Call-Intrusion-Operations-asn1-97 iso(1) standard(0) pss1-call-intrusion(14846) call-intrusion-operations-asn1-97 (2) DEFINITIONS EXPLICIT TAGS := BEGIN IMPOR
