1、 Standard ECMA-1864th Edition - December 2001 Standardizing Information and Communication Systems Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Call Completion Supplementary Services Phone: +41 22 849.60.00 - Fax: +41 22 849.60.01 - URL: http:/www.ecma.ch - Intern
2、et: helpdeskecma.ch . Standard ECMA-186 4th Edition - December 2001 Standardizing Information and Communication Systems Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Call Completion Supplementary Services (QSIG-CC) Phone: +41 22 849.60.00 - Fax: +41 22 849.60.01 -
3、 URL: http:/www.ecma.ch - Internet: helpdeskecma.ch IW Ecma-186.doc 14-01-02 14,40 . 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 I
4、TU-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 Completion supplementary services: Call Completion to Busy Subscrib
5、er (SS-CCBS) Call Completion on No Reply (SS-CCNR). 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 ECMA member companies and the results of their active and continuous participation in the work
6、 of ISO/IEC JTC1, ITU-T, ETSI and other international and national standardization bodies. It represents a pragmatic and widely based consensus. Compared to the 1st Edition of Standard ECMA-186 (published by ECMA in December 1992), the 2nd Edition incorporated changes in order to achieve complete al
7、ignment with International Standard ISO/IEC 13870:1995(E) published by ISO/IEC in November 1995. The 2nd Edition of Standard ECMA-186 was adopted by the General Assembly of June 1997. The 3rd Edition introduced the following changes compared to the 2nd Edition: Binding between non-reservation and co
8、nnection retention has been removed. Indicate value definitions for operations as “localValue“. Changes in Annex A (PICS). Editorial corrections. Compared to the 3rd Edition of Standard ECMA-186 (published by ECMA in February 2000), this 4th Edition incorporates migration to ASN.1 version 1997 as we
9、ll as changes in order to achieve complete alignment with International Standard ISO/IEC 13870:2001(E) published by ISO/IEC in July 2001. Adopted as 4th Edition of Standard ECMA-186 by the General Assembly of December 2001. . - i - Table of contents 1 Scope 1 2 Conformance 1 3 References (normative)
10、 1 4 Definitions 2 4.1 External definitions 2 4.2 Other definitions 2 4.2.1 CC Call 2 4.2.2 CC Request 2 4.2.3 Connection release 2 4.2.4 Connection retention 3 4.2.5 Path reservation 3 4.2.6 Service retention 3 5 Acronyms 3 6 Signalling protocol for the support of SS-CCBS and SS-CCNR 3 6.1 SS-CCBS/
11、CCNR description 3 6.2 SS-CC operational requirements 4 6.2.1 Requirements on the Originating PINX 4 6.2.2 Requirements on the Terminating PINX 4 6.2.3 Requirements on a Transit PINX 4 6.3 SS-CC coding requirements 5 6.3.1 Operations 5 6.3.2 Information elements 9 6.3.3 Messages 9 6.4 SS-CC State de
12、finitions 9 6.4.1 States at the Originating PINX 9 6.4.2 States at the Terminating PINX 10 6.5 SS-CC signalling procedures 10 6.5.1 Major options 10 6.5.2 Actions at the Originating PINX 11 6.5.3 Actions at the Terminating PINX 17 6.5.4 Actions at the Transit PINX 21 6.6 Impact of interworking with
13、public ISDNs 21 6.6.1 Incoming Gateway PINX procedures: SS-CCBS request from a public ISDN 21 6.6.2 Outgoing Gateway PINX procedures: SS-CCBS request to a public ISDN 22 6.7 Impact of interworking with non-ISDNs 23 6.7.1 Incoming Gateway PINX procedures 23 6.7.2 Outgoing Gateway PINX procedures 23 6
14、.8 Protocol interaction between SS-CCBS and Other Supplementary Services and ANFs 23 - ii - 6.8.1 Calling Name Identification Presentation (SS-CNIP) 24 6.8.2 Connected Name Identification Presentation (SS-CONP) 24 6.8.3 Completion of Calls on No Reply (SS-CCNR) 24 6.8.4 Call Transfer 24 6.8.5 Call F
15、orwarding Unconditional (SS-CFU) 24 6.8.6 Call Forwarding Busy (SS-CFB) 24 6.8.7 Call Forwarding No Reply (SS-CFNR) 25 6.8.8 Call Deflection (SS-CD) 25 6.8.9 Path Replacement (ANF-PR) 25 6.9 Protocol interaction between SS-CCNR and other supplementary Services and ANFs 25 6.9.1 Calling Name Identifi
16、cation Presentation (SS-CNIP) 25 6.9.2 Connected Name Identification Presentation (SS-CONP) 25 6.9.3 Completion of Calls to Busy Subscribers (SS-CCBS) 25 6.9.4 Call Transfer 25 6.9.5 Call Forwarding Unconditional (SS-CFU) 25 6.9.6 Call Forwarding Busy (SS-CFB) 26 6.9.7 Call Forwarding No Reply (SS-C
17、FNR) 26 6.9.8 Call Deflection (SS-CD) 26 6.9.9 Path Replacement (ANF-PR) 26 6.10 Parameter values (timers) 27 6.10.1 Timers at the Originating PINX 27 6.10.2 Timers at the Terminating PINX 27 Annex A - Protocol Implementation Conformance Statement (PICS) proforma 29 Annex B - Imported ASN.1 definiti
18、ons 41 Annex C - Examples of messages sequences 43 Annex D - Specification and Description Language (SDL) Representation of Procedures 53 Annex E - Bibliography 71 Annex F - ASN.1 definitions according to ITU-T Recs. X.208 / X.209 73 1 Scope This Standard specifies the signalling protocol for the su
19、pport of the Call Completion supplementary services at the Q reference point between Private Integrated services Network eXchanges (PINXs) connected together within a Private Integrated Services Network (PISN). The Call Completion supplementary services are Completion of Calls to Busy Subscribers (S
20、S-CCBS) and Completion of Calls on No Reply (SS-CCNR). SS-CCBS enables a calling User A, encountering a busy destination User B, to have the call completed when User B becomes not busy, without having to make a new call attempt. SS-CCNR enables a calling User A, encountering a destination User B tha
21、t, though alerted, does not answer, to have the call completed when User B becomes not busy again after a period of activity, without having to make a new call attempt. The Q reference point is defined in ECMA-133. Service specifications are produced in three stages and according to the method speci
22、fied 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-185. The signalling protocols for SS-CCBS and SS-CCNR operate on top of the signalling protocol for basic circui
23、t 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 requirements for the support of interactions at the Q reference point bet
24、ween SS-CC and other supplementary services and ANFs. This Standard is applicable 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
25、in annex A. 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 appl
26、ying 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 Private Integrated S
27、ervices Network (PISN) - Reference Configuration for PISN Exchanges (PINX) (International Standard ISO/IEC 11579-1) ECMA-142 Private Integrated Services Network (PISN) - Circuit Mode 64kbit/s Bearer Services - Service Description, Functional Capabilities and Information Flows (International Standard
28、 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) ECMA-155 Private Integrated Services Networks - Addressing (International Standard ISO/IEC 11571) ECMA-165 Pri
29、vate 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 Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Call D
30、iversion Supplementary Services (International Standard ISO/IEC 13873) - 2 - ECMA-185 Private Integrated Services Network (PISN) - Specification, Functional Model and Information Flows - Call Completion Supplementary Services (International Standard ISO/IEC 13866) ETS 300 387 Private Telecommunicati
31、on 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 ISDN and the means to describe them (1993) ITU-T Rec. Q.950 Supplementary services
32、 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 definitions This Standard uses the following terms defined in other documents: Application
33、 Protocol Data Unit (APDU) (ECMA-165) Basic Service (ITU-T Rec. I.210) Complete Number (ECMA-155) Incoming Gateway PINX (ECMA-143) Interpretation APDU (ECMA-165) Network Facility Extension (NFE) (ECMA-165) Originating PINX (ECMA-165) Outgoing Gateway PINX (ECMA-143) Private Integrated Services Netwo
34、rk (PISN) (ECMA-133) Private Integrated services Network eXchange (PINX) (ECMA-133) Signalling (ITU-T Rec. I.112) Supplementary Service (ITU-T Rec. I.210) Supplementary Service Control Entity (ECMA-165) Terminating PINX (ECMA-165) Transit PINX (ECMA-165) User (ECMA-142) 4.2 Other definitions 4.2.1 C
35、C Call The re-initiation, in the course of executing a CC Request, of the previously unsuccessful call from User A to User B on behalf of User A, with or without Path Reservation. 4.2.2 CC Request An instance of SS-CCBS or SS-CCNR. 4.2.3 Connection release The release of the call independent signall
36、ing connection as soon as a SS-CC has been initiated and the establishment of further call independent signalling connections for subsequent phases of the service. - 3 - 4.2.4 Connection retention The use of a single call independent signalling connection throughout the lifetime of a particular inst
37、ance of SS-CC. 4.2.5 Path reservation The reservation of resources prior to the SS-CC Recall, by means of a basic call set up from the Originating to the Terminating PINX, in order to have a bearer connection through the PISN available when User A accepts the SS-CC Recall. 4.2.6 Service retention Th
38、e optional capability to continue with a CC Request after the CC Call failed due to User B being busy again. 5 Acronyms APDU Application Protocol Data Unit ASN.1 Abstract Syntax Notation no. 1 CC Call Completion ISDN Integrated Services Digital Network MSI Manufacturer Specific Information NFE Netwo
39、rk Facility Extension PICS Protocol Implementation Conformance Statement PINX Private Integrated services Network eXchange PISN Private Integrated Services Network SDL Specification and Description Language SS-CC Supplementary Service Completion of Calls (i.e. SS-CCBS or SS-CCNR) SS-CCBS Supplementa
40、ry Service Completion of Calls to Busy Subscribers SS-CCNR Supplementary Service Completion of Calls on No Reply TE Terminal Equipment 6 Signalling protocol for the support of SS-CCBS and SS-CCNR 6.1 SS-CCBS/CCNR description Completion of Calls to Busy Subscribers (SS-CCBS) is a supplementary servic
41、e which allows a calling User A, on encountering a busy called User B, to request that the PISN monitors User B and indicates to User A when User B becomes not busy. On response by User A to that indication the PISN will attempt to complete the call to User B. Completion of Calls on No Reply (SS-CCN
42、R) is a supplementary service which allows a calling User A, when the called User B does not respond to the call request, to request that the PISN monitors User B and indicates to User A when User B becomes not busy after a subsequent period of activity at User Bs TE. On response by User A to that i
43、ndication the PISN will attempt to complete the call to User B. NOTE Which activities at User Bs TE would result in a B not busy indication to User A is outside the scope of this Standard. These supplementary services are applicable to all basic services defined in ECMA-142. - 4 - 6.2 SS-CC operatio
44、nal requirements 6.2.1 Requirements on the Originating PINX Call establishment procedures for the outgoing 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 ECMA-16
45、5 for an End PINX, shall apply. Additionally generic procedures for the call independent control (connection oriented) of supplementary services, as specified in ECMA-165 for an Originating and a Terminating PINX, shall apply. 6.2.2 Requirements on the Terminating PINX Call establishment procedures
46、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 ECMA-165 for an End PINX, shall apply. Additionally generic procedures for the call independent c
47、ontrol (connection oriented) of supplementary services, as specified in ECMA-165 for an Originating and a Terminating PINX, shall apply. 6.2.3 Requirements on a Transit PINX Basic call procedures for call establishment and call clearing at a Transit PINX, as specified in ECMA-143, shall apply. NOTE
48、The use of basic call timer T310 at a Transit PINX can cause premature clearing of a reserved path if the timer value is too short. For this reason this Standard specifies the sending of CCITT progress description no. 8 “in-band information or appropriate pattern now available“ by the Terminating PI
49、NX, in order to stop timer T310, even though in-band tones and announcements are not applicable in this situation. Generic procedures for the call related control and call independent control (connection oriented) of supplementary services, as specified in ECMA-165 for a Transit PINX, shall apply. - 5 - 6.3 SS-CC 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 supersed
