1、 Standard ECMA-264 3rd Edition - December 2001 Standardizing Information and Communication Systems Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Call Priority Interruption and Call Priority Interruption Protection Supplementary Services Phone: +41 22 849.60.00 - F
2、ax: +41 22 849.60.01 - URL: http:/www.ecma.ch - Internet: helpdeskecma.ch . Standard ECMA-264 3rd Edition - December 2001 Standardizing Information and Communication Systems Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Call Priority Interruption and Call Priority
3、 Interruption Protection Supplementary Services (QSIG-CPI(P) Phone: +41 22 849.60.00 - Fax: +41 22 849.60.01 - URL: http:/www.ecma.ch - Internet: helpdeskecma.ch IW Ecma-264.doc 31-01-02 16,13 . Brief History This Standard is one of a series of ECMA Standards defining services and signalling protoco
4、ls applicable to Private Integrated Services Networks (PISNs). The series uses ISDN concepts as developed by ITU-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 th
5、e Q reference point in support of the Call Priority Interruption (CPI) and Call Priority Interruption Protection (CPIP) supplementary services. The protocol defined in this Standard forms part of the PSS1 protocol (informally known as QSIG). This Standard is based upon the practical experience of EC
6、MA 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. It represents a pragmatic and widely based consensus. There are currently no equivalent services specified by ITU-T o
7、r ETSI for public ISDN. Compared to the 1st Edition of Standard ECMA-264 (published by ECMA in September 1997), the 2nd Edition incorporated changes to achieve complete alignment with International Standard ISO/IEC 15992:1998(E) published by ISO/IEC in December 1998. Compared to the 2nd edition of S
8、tandard ECMA-264 (published by ECMA in December 1998), this 3rd edition incorporates migration to ASN.1 version 1997. Adopted as 3rd Edition of Standard ECMA-264 by the General Assembly of December 2001. - i - Table of contents 1 Scope 1 2 Conformance 1 3 References (normative) 1 4 Definitions 2 4.1
9、 External definitions 2 4.2 Called user 3 4.3 Calling user 3 4.4 Call interruption 3 4.5 Call Priority Interruption Capability Level (CPICL) 3 4.6 Call Priority Interruption Protection Level (CPIPL) 3 4.7 Call protection 3 4.8 Established call 3 4.9 Established call user 3 4.10 Established call user
10、s PINX 3 4.11 Forced release 3 4.12 Inter-PINX link 3 4.13 Interrupting PINX 3 4.14 Non-priority call 3 4.15 Priority call 3 4.16 Protected call 3 5 List of acronyms 4 6 Signalling protocol for the support of SS-CPI(P) 4 6.1 SS-CPI(P) description 4 6.2 SS-CPI(P) operational requirements 4 6.2.1 Requ
11、irements on the Originating PINX 4 6.2.2 Requirements on the Terminating PINX 4 6.2.3 Requirements on a Transit PINX 4 6.2.4 Requirements on the Interrupting PINX 4 6.2.5 Requirements on the Established call users PINX 5 6.3 SS-CPI(P) coding requirements 5 6.3.1 Operations 5 6.3.2 Notifications 6 6.
12、3.3 Information elements 6 6.3.4 Messages 7 6.4 SS-CPI state definitions 7 6.4.1 States at the Originating PINX 7 6.4.2 States at the Transit PINX 7 6.4.3 States at the Interrupting PINX 7 - ii - 6.5 SS-CPIP state definitions 7 6.5.1 States at the Originating PINX 7 6.5.2 States at the Transit PINX
13、8 6.5.3 States at the Terminating PINX 8 6.6 SS-CPI signalling procedures for activation, deactivation and registration 8 6.7 SS-CPIP signalling procedures for activation, deactivation and registration 8 6.8 SS-CPI signalling procedures for invocation and operation 8 6.8.1 Actions at the Originating
14、 PINX 8 6.8.2 Actions at a Transit PINX 9 6.8.3 Actions at the Interrupting PINX 9 6.8.4 Actions at the Terminating PINX 10 6.8.5 Actions at the Established call users PINX 11 6.9 SS-CPIP signalling procedures for invocation and operation 11 6.9.1 Actions at the Originating PINX 11 6.9.2 Actions at
15、a Transit PINX 11 6.9.3 Actions at the Terminating PINX 11 6.10 SS-CPI impact of interworking with public ISDNs 12 6.11 SS-CPIP impact of interworking with public ISDNs 12 6.12 SS-CPI impact of interworking with non-ISDNs 12 6.13 SS-CPIP impact of interworking with non-ISDNs 12 6.14 Protocol interac
16、tions between SS-CPI(P) and other supplementary services and ANFs 13 6.14.1 Interaction with Calling Name Identification Presentation (SS-CNIP) 13 6.14.2 Interaction with Connected Name Identification Presentation (SS-CONP) 13 6.14.3 Interaction with Completion of Call to Busy Subscriber (SS-CCBS) 1
17、3 6.14.4 Interaction with Completion of Call on No Reply (SS-CCNR) 13 6.14.5 Interaction with Call Transfer (SS-CT) 13 6.14.6 Interaction with Call Forwarding Unconditional (SS-CFU) 13 6.14.7 Interaction with Call Forwarding Busy (SS-CFB) 14 6.14.8 Interaction with Call Forwarding No Reply (SS-CFNR)
18、 14 6.14.9 Interaction with Call Deflection (SS-CD) 14 6.14.10 Interaction with Path Replacement (ANF-PR) 14 6.14.11 Interaction with Call Offer (SS-CO) 14 6.14.12 Interaction with Call Intrusion (SS-CI) 14 6.14.13 Interaction with Do not Disturb (SS-DND) 14 6.14.14 Interaction with Do not Disturb O
19、verride (SS-DNDO) 14 6.14.15 Interaction with Advice of Charge (SS-AOC) 14 6.14.16 Interaction with Recall (SS-RE) 14 6.14.17 Interaction with Call Interception (ANF-CINT) 14 6.14.18 Interaction with Transit Counter (ANF-TC) 15 6.14.19 Interaction with Wireless Terminal Location Registration (SS-WTL
20、R) 15 6.14.20 Interaction with Wireless Terminal Incoming Call (ANF-WTMI) 15 6.14.21 Interaction with Wireless Terminal Outgoing Call (ANF-WTMO) 15 6.14.22 Interaction with Wireless Terminal Authentication of a WTM user (SS-WTAT) 15 6.14.23 Interaction with Wireless Terminal Authentication of a PISN
21、 (SS-WTAN) 15 6.14.24 Interaction with Message Waiting Indication (SS-MWI) 15 - iii - 6.14.25 Interaction with Common Information (ANF-CMN) 15 6.15 SS-CPI parameter values (timers) 15 6.15.1 Timer T1 15 Annex A - Protocol Implementation Conformance Statement (PICS) proforma 17 Annex B - Examples of
22、message sequences 25 Annex C - Specification and Description Language (SDL) representation of procedures 31 Annex D - ASN.1 definitions according to ITU-T Recs. X.208 / X.209 39 1 Scope This ECMA Standard specifies the signalling protocol for the support of the Call priority interruption (SS-CPI) an
23、d Call Priority Interruption Protection (SS-CPIP) supplementary services at the Q reference point between Private Integrated services Network eXchanges (PINXs) connected together within a Private Integrated Services Network (PISN). NOTE 1 This edition of this Standard does not apply to calls using t
24、he circuit-mode multiple rate bearer service. SS-CPI allows a call request for a priority call to proceed successfully in the case that there is no user information channel available. This is accomplished by force releasing an established call of lower priority. SS-CPIP allows for the protection of
25、calls against interruption from priority calls. The Q reference point is defined in ECMA-133. Service specifications are produced in three stages and according to the method specified in ETS 300 387. This ECMA Standard contains the stage 3 specification for the Q reference point and satisfies the re
26、quirements identified by the stage 1 and stage 2 specifications in ECMA-263. The signalling protocol for SS-CPI(P) 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 suppl
27、ementary services specified in ECMA-165. This Standard also specifies additional signalling protocol requirements for the support of interactions at the Q reference point between SS-CPI(P) and other supplementary services and ANFs. NOTE 2 Additional interactions that have no impact on the signalling
28、 protocol at the Q reference point can be found in the relevant stage 1 specifications. This ECMA Standard is applicable to PINXs that 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
29、Conformance Statement (PICS) proforma in annex A. Conformance to this Standard includes conforming to those clauses that specify protocol interactions between SS-CPI(P) and other supplementary services and ANFs for which signalling protocols at the Q reference point are supported in accordance with
30、the stage 3 standards concerned. 3 References (normative) The following standards contain provisions 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 th
31、e possibility of applying the most recent editions of the standards indicated below. In the case 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
32、 Private Integrated Services Network (PISN) - Reference Configuration for PISN Exchanges (PINX) (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 (
33、International Standard ISO/IEC 11574) ECMA-143 Private Integrated Services Network (PISN) - Circuit-mode Bearer Services - Inter-Exchange Signalling Procedures and Protocol (International Standard ISO/IEC 11572) - 2 - ECMA-165 Private Integrated Services Network (PISN) - Generic Functional Protocol
34、for the Support of Supplementary Services - Inter-Exchange Signalling Procedures and Protocol (International Standard ISO/IEC 11582) ECMA-174 Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Call Diversion Supplementary Services (International Standard ISO/IEC 13873)
35、 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 Services Network (PISN) - Inter-Exchange Signalling Protocol - Call Transfer Supplementary Servic
36、es (International Standard ISO/IEC 13869) ECMA-221 Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Call Interception Additional Network Feature (International Standard ISO/IEC 15054) ECMA-263 Private Integrated Services Network (PISN) - Specification, Functional Mod
37、el and Information Flows - Call Priority Interruption and Call Priority Interruption Protection Supplementary Services (International Standard ISO/IEC 15991) ECMA-304 Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Wireless Terminal Call Handling Additional Network
38、Features (International Standard ISO/IEC 15431) 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 telecommunication services supported by an
39、 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 definitions apply. 4.1 External definit
40、ions This ECMA Standard uses the following terms defined in other documents: Adjacent PINX (ECMA-165) Application Protocol Data Unit (APDU) (ECMA-165) Basic Service (ITU-T Rec. I.210) Call, Basic Call (ECMA-165) Coordination Function (ECMA-165) Notification (ECMA-165) Originating PINX (ECMA-143) Pre
41、ceding PINX (ECMA-143) Private Integrated Services Network (PISN) (ECMA-133) Private Integrated services Network Exchange (PINX) (ECMA-133) Signalling (ITU-T Rec. I.112) Subsequent PINX (ECMA-143) Supplementary Service (ITU-T Rec. I.210) Terminating PINX (ECMA-143) - 3 - Transit PINX (ECMA-143) User
42、 (ECMA-142) 4.2 Called user The user that receives a request to accept an incoming call and who may request SS-CPIP. 4.3 Calling user The user that originates a call attempt and who may request SS-CPI and/or SS-CPIP. 4.4 Call interruption An invocation procedure of SS-CPI whereby the calling user in
43、dicates that a “priority call“ is to be made. 4.5 Call Priority Interruption Capability Level (CPICL) A parameter indicating the priority of a call. 4.6 Call Priority Interruption Protection Level (CPIPL) A parameter indicating a level of protection of a call against interruption from other calls. 4
44、.7 Call protection An invocation procedure of SS-CPIP whereby the calling user or the called user indicates that a call is to be protected. 4.8 Established call The active call that is selected for interruption. 4.9 Established call user A user in the established call. 4.10 Established call users PI
45、NX The PINX serving one of the users in the established call. 4.11 Forced release The release of the established call during interruption. 4.12 Inter-PINX link The totality of a signalling channel and a number of user information channels at the Q reference point. 4.13 Interrupting PINX The PINX tha
46、t selects an established call for interruption. NOTE 3 The Originating PINX or any Transit PINX involved in a call may also be an Interrupting PINX. 4.14 Non-priority call A call that has not been assigned a CPICL value. 4.15 Priority call A call that has a CPICL value greater than zero. NOTE 4 A pr
47、iority call may also be a protected call. 4.16 Protected call A call that has a CPIPL value greater than zero. NOTE 5 A protected call may also be a priority call. - 4 - 5 List of acronyms ANF Additional Network Feature APDU Application Protocol Data Unit ASN.1 Abstract Syntax Notation no. 1 CPICL C
48、all Priority Interruption Capability Level CPIPL Call Priority Interruption 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 N
49、etwork SDL Specification and Description Language SS-CPI Call Priority Interruption Supplementary Service SS-CPIP Call Priority Interruption Protection Supplementary Service 6 Signalling protocol for the support of SS-CPI(P) 6.1 SS-CPI(P) description SS-CPI is a supplementary service that allows a call request for a priority call to proceed successfully in the case that there is no user information channel available. SS-CPI may be invoked by the calling user. SS-CPIP is a supplementary service that allows for the protection of calls against interrupti
