1、 Standard ECMA-214 3rd Edition - December 2001 Standardizing Information and Communication Systems Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Recall Supplementary Service Phone: +41 22 849.60.00 - Fax: +41 22 849.60.01 - URL: http:/www.ecma.ch - Internet: helpd
2、eskecma.ch . Standard ECMA-214 3rd Edition - December 2001 Standardizing Information and Communication Systems Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Recall Supplementary Service (QSIG-RE) Phone: +41 22 849.60.00 - Fax: +41 22 849.60.01 - URL: http:/www.ecm
3、a.ch - Internet: helpdeskecma.ch IW Ecma-214.doc 14-01-02 10,08 . 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-T and conforms t
4、o 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 Recall supplementary service. The protocol defined in this Standard forms part of the PSS1
5、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. It represents a pragma
6、tic and widely based consensus. Compared to the 1st Edition of Standard ECMA-214 (published by ECMA in December 1994), the 2nd Edition incorporated changes in order to achieve complete alignment with International Standard ISO/IEC 15052:1997(E) published by ISO/IEC in May 1997. Compared to the 2nd E
7、dition of Standard ECMA-214 (published by ECMA in June 1997), this 3rd Edition incorporates migration to ASN.1 version 1997. Adopted as 3rd Edition of Standard ECMA-214 by the General Assembly of December 2001. . - i - Table of contents 1 Scope 1 2 Conformance 1 3 References (normative) 1 4 Definiti
8、ons 2 4.1 External definitions 2 4.2 Other definitions 3 4.2.1 Served user, User A 3 4.2.2 Served User PINX 3 5 List of acronyms 3 6 Signalling protocol for the support of SS-RE 3 6.1 SS-RE description 3 6.2 SS-RE operational requirements 3 6.2.1 Provision/withdrawal 3 6.2.2 Requirements on the Prim
9、ary PINX 3 6.2.3 Requirements on the Served User PINX 3 6.3 SS-RE coding requirements 4 6.3.1 Operations 4 6.3.2 Information elements 5 6.3.3 Messages 5 6.4 SS-RE State definitions 5 6.4.1 States at the Served User PINX 5 6.4.2 States at the Primary PINX 5 6.5 SS-RE signalling procedures 5 6.5.1 Act
10、ions at the Served User PINX 6 6.5.2 Actions at the Primary PINX 6 6.6 SS-RE Impact of interworking with public ISDNs 6 6.7 SS-RE Impact of interworking with non-ISDNs 6 6.8 SS-RE Parameter values (Timers) 7 6.9 Protocol interactions between SS-RE and other supplementary services and ANFs 7 6.9.1 In
11、teraction with Calling Name Identification Presentation (SS-CNIP) 7 6.9.2 Interaction with Connected Name Identification Presentation (SS-CONP) 7 6.9.3 Interaction with Call Forwarding Unconditional (SS-CFU) 7 6.9.4 Interaction with Call Forwarding Busy (SS-CFB) 7 6.9.5 Interaction with Call Forward
12、ing No Reply (SS-CFNR) 7 6.9.6 Interaction with Call Transfer (SS-CT) 8 6.9.7 Interaction with Path Replacement (ANF-PR) 8 6.9.8 Interaction with Call Completion to Busy Subscriber (SS-CCBS) 8 6.9.9 Interaction with Call Completion on No Reply (SS-CCNR) 8 - ii - 6.9.10 Interaction with Call Offer (S
13、S-CO) 8 6.9.11 Interaction with Do Not Disturb (SS-DND) 8 6.9.12 Interaction with Do Not Disturb Override (SS-DNDO) 8 6.9.13 Interaction with Call Intrusion (SS-CI) 8 6.9.14 Interaction with Advice of Charge (SS-AOC) 8 6.9.15 Interactions with Call Interception delayed (ANF-CINT) 8 Annex A - Protoco
14、l Implementation Conformance Statement (PICS) proforma 9 Annex B - Example of message sequences 15 Annex C - Specification and Description Language (SDL) Representation of procedures 17 Annex D - ASN.1 definitions according to ITU-T Recs. X.208 / X.209 21 1 Scope This Standard specifies the signalli
15、ng protocol for the support of Recall supplementary service (SS-RE) at the Q reference point between Private Integrated services Network eXchanges (PINXs) connected together within Private Integrated Services Network (PISN). SS-RE is a supplementary service which provides for the re-direction of a t
16、ransferred call back to the served user if the call is unanswered. SS-RE is only applicable after transfer by join, not after transfer by rerouteing. 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
17、. 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-213. The signalling protocol for SS-RE operates on top of the signalling protocol for basic circuit switched call control, as speci
18、fied 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 requirements for the support of interactions at the Q reference point between SS-RE and other supplementar
19、y services and ANFs. However, the interaction with the Call Transfer supplementary service is specified as part of SS-RE signalling procedures as it is the essential aspect of the Recall supplementary service. NOTE Additional interactions that have no impact on the signalling protocol at the Q refer
20、ence point can be found in the relevant stage 1 specifications. This Standard is applicable to PINXs which can be interconnected 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 (
21、PICS) proforma in annex A. Conformance to this Standard includes conforming to those clauses that specify protocol interactions between SS-RE and other supplementary services and ANFs for which signalling protocols at the Q reference point are supported in accordance with the stage 3 standards conce
22、rned. 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 the possibility of applying t
23、he 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 Private Integrated Service
24、s 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 (International Standard ISO/
25、IEC 11574) ECMA-143 Private Integrated Services Network (PISN) - Circuit-mode Bearer Services - Inter-Exchange Signalling Procedures and Protocol (International Standard ISO/IEC 11572) ECMA-164 Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Name Identification Supp
26、lementary Services (International Standard ISO/IEC 13868) - 2 - ECMA-165 Private Integrated Services Network (PISN) - Generic Functional Protocol for the Support of Supplementary Services - Inter-Exchange Signalling Procedures and Protocol (International Standard ISO/IEC 11582) ECMA-174 Private Inte
27、grated Services Network - Inter-Exchange Signalling Protocol - Call Diversion Supplementary Services (International Standard ISO/IEC 13873) ECMA-177 Private Integrated Services Network (PISN) - Specification, Functional Model and Information Flows - Call Transfer Supplementary Service (International
28、 Standard ISO/IEC 13865) ECMA-178 Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Call Transfer Supplementary Services (International Standard ISO/IEC 13869) ECMA-213 Private Integrated Services Network (PISN) - Specification, Functional Model and Information Flows
29、- Recall Supplementary Service (International Standard ISO/IEC 15051) ECMA-221 Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Call Interception Additional Network Feature (International Standard ISO/IEC 15054) ETS 300 387 Private Telecommunication Network (PTN); Me
30、thod 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 ISDN and the means to describe them (1993) ITU-T Rec. Z.100 Specification and description language (19
31、99) 4 Definitions For the purposes of this Standard, the following definitions apply. 4.1 External definitions This Standard uses the following terms defined in other documents: Application Protocol Data Unit (ECMA-165) Basic Service (ITU-T Rec. I.210) Call, Basic Call (ECMA-165) End PINX (ECMA-165)
32、 Gateway PINX (ECMA-143) Integrated Services Digital Network (ITU-T Rec. I.112) Interpretation APDU (ECMA-165) Private Integrated Services Network (PISN) (ECMA-133) Private Integrated services Network eXchange (PINX) (ECMA-133) Primary Call (ECMA-177) Primary PINX (ECMA-178) Secondary Call (ECMA-177
33、) Secondary PINX (ECMA-178) Signalling (ITU-T Rec. I.112) Supplementary Service (ITU-T Rec. I.210) Supplementary Service Control Entity (ECMA-165) - 3 - User (ECMA-142) User B (ECMA-177) User C (ECMA-177) 4.2 Other definitions 4.2.1 Served user, User A The user of the Recall service located at the S
34、erved User PINX. 4.2.2 Served User PINX The End PINX which initiates the call transfer procedures on behalf of user A and which recalls user A in case the recall condition applies. 5 List of acronyms APDU Application Protocol Data Unit ASN.1 Abstract Syntax Notation One ISDN Integrated Services Digi
35、tal Network NFE Network Facility Extension PICS Protocol Implementation Conformance Statement PINX Private Integrated services Network eXchange PISN Private Integrated Services Network SDL Specification and Description Language SS-CT Call Transfer supplementary service SS-RE Recall supplementary ser
36、vice 6 Signalling protocol for the support of SS-RE 6.1 SS-RE description When the served user has a call established with user B and transfers that call to user C SS-RE enables user B to be re-connected to the served user if user C is being alerted and does not reply within a specified time, or if
37、the call is waiting at a busy user C and remains busy for a specified time. 6.2 SS-RE operational requirements 6.2.1 Provision/withdrawal SS-RE is provided or withdrawn after pre-arrangement with the service provider, or may be available generally to all users. SS-RE may be withdrawn on request of t
38、he user or for administrative reasons. 6.2.2 Requirements on the Primary PINX The basic call procedures specified in ECMA-143 shall be supported. Generic procedures for the call related control of supplementary services, as specified in ECMA-165 for an End PINX, shall apply. 6.2.3 Requirements on th
39、e Served User PINX The basic call procedures specified in ECMA-143 shall be supported. Generic procedures for the call related control of supplementary services, as specified in ECMA-165 for an End PINX, shall apply. - 4 - 6.3 SS-RE coding requirements 6.3.1 Operations The operations defined in Abst
40、ract 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 D. Table 1 - Operations in Support of SS-RE Recall-Operations-asn1-97 iso (1) standard (0) pss1-recall (15052) re
41、call-operations-asn1-97 (1) DEFINITIONS EXPLICIT TAGS := BEGIN IMPORTS OPERATION, ERROR FROM Remote-Operations-Information-Objects joint-iso-itu-t (2) remote-operations (4) informationObjects (5) version1(0) EXTENSION, Extension FROM Manufacturer-specific-service-extension-class-asn1-97 iso (1) stan
42、dard (0) pss1-generic-procedures (11582) msi-class-asn1-97 (11) Name FROM Name-Operations-asn1-97 iso (1) standard (0) pss1-name (13868) name-operations-asn1-97 (1) PresentedNumberScreened, PartySubaddress FROM Addressing-Data-Elements-asn1-97 iso (1) standard (0) pss1-generic-procedures (11582) add
43、ressing-data-elements-asn1-97 (20) ; Recall-Operations OPERATION := recallAlerting | recallAnswered recallAlerting OPERATION := - Sent from the Served User PINX to the Primary PINX ARGUMENT ReAlertingArg RETURN RESULT FALSE ALWAYS RESPONDS FALSE CODE local: 57 recallAnswered OPERATION := - Sent from
44、 the Served User PINX to the Primary PINX ARGUMENT ReAnswerArg RETURN RESULT FALSE ALWAYS RESPONDS FALSE CODE local: 58 ReAlertingArg := SEQUENCE alertedNumber 1 PresentedNumberScreened OPTIONAL, alertedName 2 Name OPTIONAL, argumentExtension CHOICE extension 6 IMPLICIT ExtensionREExtSet, multipleEx
45、tension 7 IMPLICIT SEQUENCE OF ExtensionREExtSet OPTIONAL - 5 - Table 1 - Operations in Support of SS-RE (concluded) ReAnswerArg := SEQUENCE connectedNumber 1 PresentedNumberScreened, connectedSubaddress 2 PartySubaddress OPTIONAL, connectedName 3 Name OPTIONAL, argumentExtension CHOICE extension 6
46、IMPLICIT ExtensionREExtSet, multipleExtension 7 IMPLICIT SEQUENCE OF ExtensionREExtSet OPTIONAL REExtSet EXTENSION := END - of Recall-Operations-asn1-97 6.3.2 Information elements 6.3.2.1 Facility information element The operations defined in 6.3.1 shall be coded in the Facility information element
47、in accordance with ECMA-165. When conveying the invoke APDU of the operations defined in 6.3.1, the destinationEntity data element of the NFE shall contain value endPINX and the Interpretation APDU shall contain value discardAnyUnrecognisedInvokePdu. 6.3.3 Messages The Facility information element s
48、hall be conveyed in the messages as specified in clause 10 of ECMA-165. 6.4 SS-RE State definitions 6.4.1 States at the Served User PINX The procedures for the Served User PINX are written in terms of the following conceptual states existing within the SS-RE Supplementary Service Control entity. 6.4
49、.1.1 RE-Idle SS-RE is not operating at the Served User PINX. 6.4.1.2 RE-Await-Answer-From-User-A The recall to user A has been initiated by the Served User PINX. 6.4.2 States at the Primary PINX The procedures for the Primary PINX are written in terms of the following conceptual states existing within the SS-RE Supplementary Service Control entity in that PINX in association with a particular call: 6.4.2.1 RE-Idle-P SS-RE is not operating at the Primary PI
