1、 Standard ECMA-220 3rd Edition - December 2001 Standardizing Information and Communication Systems Private Integrated Services Network (PISN) - Specification, Functional Model and Information Flows - Call Interception Additional Network Feature Phone: +41 22 849.60.00 - Fax: +41 22 849.60.01 - URL:
2、http:/www.ecma.ch - Internet: helpdeskecma.ch . Standard ECMA-220 3rd Edition - December 2001 Standardizing Information and Communication Systems Private Integrated Services Network (PISN) - Specification, Functional Model and Information Flows - Call Interception Additional Network Feature (ANF-CIN
3、TSD) Phone: +41 22 849.60.00 - Fax: +41 22 849.60.01 - URL: http:/www.ecma.ch - Internet: helpdeskecma.ch IW Ecma-220.doc 14-01-02 10,09 . Brief History This Standard is one of a series of ECMA Standards defining services and signalling protocols applicable to Private Integrated Services Networks (P
4、ISNs). 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 Call Interception additional network feature. This Standard is based upon the practical e
5、xperience 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 pragmatic and widely based consensus. Compared to the 1st Edition of Standard ECMA-220
6、 (published by ECMA in March 1995), the 2nd Edition (published by ECMA in June 1997) incorporated changes in order to achieve complete alignment with International Standard ISO/IEC 15053:1997(E) published by ISO/IEC in May 1997. Adopted as 3rd Edition of Standard ECMA-220 by the General Assembly of
7、December 2001. - i - Table of contents 1 Scope 1 2 Conformance 1 3 References (normative) 1 4 Definitions 1 4.1 External definitions 1 4.2 Other definitions 2 4.2.1 Additional Network Feature 2 4.2.2 ANF-CINT user 2 4.2.3 Busy 2 4.2.4 Call, basic call 2 4.2.5 Called user 2 4.2.6 Intercepted-to user
8、2 4.2.7 Interception cause 2 4.2.8 Interception delayed 3 4.2.9 Interception immediate 3 4.2.10 Waiting on busy 3 5 List of acronyms 3 6 ANF-CINT stage 1 specification 3 6.1 Description 3 6.1.1 General description 3 6.1.2 Qualifications on applicability to telecommunication services 4 6.2 Procedures
9、 4 6.2.1 Provision/withdrawal 4 6.2.2 Normal procedures 4 6.2.3 Exceptional procedures 5 6.3 Interactions with other supplementary services and ANFs 5 6.3.1 Calling Line Identification Presentation (CLIP) 6 6.3.2 Connected Line Identification Presentation (COLP) 6 6.3.3 Calling/Connected Line Identi
10、fication Restriction (CLIR) 6 6.3.4 Calling Name Identification Presentation (CNIP) 6 6.3.5 Connected Name Identification Presentation (CONP) 6 6.3.6 Calling/Connected Name Identification Restriction (CNIR) 6 6.3.7 Call Diversion (CFU, CFB, CFNR, CD) 6 6.3.8 Do Not Disturb (DND) 6 6.3.9 Do Not Distu
11、rb Override (DNDO) 6 6.3.10 Call Completion to Busy Subscriber (CCBS) 6 6.3.11 Call Completion on No Reply (CCNR) 6 6.3.12 Call Offer (CO) 6 - ii - 6.3.13 Call Intrusion (CI) 7 6.3.14 Call Transfer (CT) 7 6.3.15 Path Replacement (PR) 7 6.3.16 Advice Of Charge (AOC/S/D/E) 7 6.3.17 Recall (RE) 7 6.4 I
12、nterworking considerations 7 6.5 Overall SDL 7 7 ANF-CINT stage 2 specification 12 7.1 Functional model 12 7.1.1 Functional model description 12 7.1.2 Description of functional entities 12 7.1.3 Relationship of functional model to basic call functional model 13 7.2 Information flows 13 7.2.1 Definit
13、ion of information flows 13 7.2.2 Relationship of information flows to basic call information flows 20 7.2.3 Information flow sequences 20 7.3 Functional entity actions 27 7.3.1 Functional entity actions of FE1 27 7.3.2 Functional entity actions of FE2 27 7.3.3 Functional entity actions of FE3 27 7.
14、3.4 Functional entity actions of FE4 28 7.3.5 Functional entity actions of FE5 28 7.3.6 Functional entity actions of FE6 28 7.4 Functional entity behaviour 28 7.4.1 Behaviour of FE1 29 7.4.2 Behaviour of FE2 30 7.4.3 Behaviour of FE3 31 7.4.4 Behaviour of FE4 33 7.4.5 Behaviour of FE5 34 7.4.6 Behav
15、iour of FE6 36 7.5 Allocation of functional entities to physical equipment 37 7.6 Interworking considerations 38 1 Scope This Standard specifies Additional Network Feature Call Interception (ANF-CINT), which is applicable to various basic services supported by Private Integrated Services Networks (P
16、ISN). Basic services are specified in ECMA-142. ANF-CINT is an additional network feature which enables calls that cannot be completed due to certain conditions to be redirected to a pre-defined intercepted-to user. ANF specifications are produced in three stages, according to the method described i
17、n ETS 300 387. This Standard contains the stage 1 and stage 2 specifications of ANF-CINT. The stage 1 specification (clause 6) specifies the feature as seen by users of PISNs. The stage 2 specification (clause 7) identifies the functional entities involved in the feature and the information flows be
18、tween them. 2 Conformance In order to conform to this Standard, a stage 3 standard shall specify signalling protocols and equipment behaviour that are capable of being used in a PISN which supports the feature specified in this Standard. This means that, to claim conformance, a stage 3 standard is r
19、equired to be adequate for the support of those aspects of clause 6 (stage 1) and clause 7 (stage 2) which are relevant to the interface or equipment to which the stage 3 standard applies. 3 References (normative) The following standards contain provisions which, through reference in this text, cons
20、titute 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 case of references to ECMA Standards that are aligne
21、d 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) (International Standard ISO/IEC 11579-1) ECMA-14
22、2 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-155 Private Integrated Services Networks - Addressing (International Standard ISO/IEC 11571) ETS 300
23、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 ISDN and the means to describe them (1993) ITU-T Rec. I
24、.221 Common specific characteristics of services (1993) 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: Basic S
25、ervice (ITU-T Rec. I.210) Connection (ITU-T Rec. I.112) - 2 - Network Determined User Busy (ITU-T Rec. I.221) Private Integrated Services Network (PISN) (ECMA-133) Private Integrated services Network eXchange (PINX) (ECMA-133) PISN Number (ECMA-155) Service (ITU-T Rec. I.112) Signalling (ITU-T Rec.
26、I.112) Supplementary Service (ITU-T Rec. I.210) User Determined User Busy (ITU-T Rec. I.221) User (except in the context of ANF-CINT user) (ECMA-142) This Standard refers to the following basic call functional entities (FEs) defined in ECMA-142: Call Control (CC) Call Control Agent (CCA). This Stand
27、ard refers to the following basic call inter-FE relationships defined in ECMA-142: r1 r2 r3 This Standard refers to the following basic call information flows defined in ECMA-142: Disconnect request/indication Setup request/indication Setup response/confirmation Report request/indication Release req
28、uest/indication 4.2 Other definitions 4.2.1 Additional Network Feature A capability, over and above that of a basic service, provided by a PISN, but not directly to a PISN user. 4.2.2 ANF-CINT user An entity, within a PISN, that requests ANF-CINT. 4.2.3 Busy A property of a user for whom either a Ne
29、twork Determined User Busy or a User Determined User Busy condition exists. 4.2.4 Call, basic call An instance of the use of a basic service. 4.2.5 Called user The user to which a call is directed prior to invocation of ANF-CINT. 4.2.6 Intercepted-to user The user to which the intercepted call is di
30、rected. 4.2.7 Interception cause A condition that can lead to call interception. - 3 - 4.2.8 Interception delayed The redirection of a call to an alternative destination as a result of remaining too long in an alerting or waiting on busy state. 4.2.9 Interception immediate The redirection of a call
31、to an alternative destination as a result of detecting a condition that prevents the call reaching an alerting or waiting on busy state. 4.2.10 Waiting on busy A call state in which a call is awaiting answer at a user that is busy on another call. NOTE This can arise, for example, as a result of the
32、 use of supplementary service Call Offer (SS-CO) during call establishment. A call that is waiting on busy can be transferred. 5 List of acronyms ANF Additional Network Feature ANF-CINT Additional Network Feature Call Interception CC Call Control (functional entity) CCA Call Control Agent (functiona
33、l entity) CD Call Deflection CFB Supplementary Service Call Forwarding Busy CFNR Supplementary Service Call Forwarding No Reply CFU Supplementary Service Call Forwarding Unconditional CLIR Calling/Connected Line Identification Restriction CNIP Calling Name Identification Presentation CNIR Calling/Co
34、nnected Name Identification Restriction FE Functional Entity ISDN Integrated Services Digital Network PINX Private Integrated services Network eXchange PISN Private Integrated Services Network SDL Specification and Description Language SS Supplementary Service TE Terminal Equipment 6 ANF-CINT stage
35、1 specification 6.1 Description 6.1.1 General description ANF-CINT is invoked by an ANF-CINT user for an unanswered or unsuccessful call, allowing the call to be routed to a special destination in the PISN. The special destination may be dependent on the interception cause. The conditions leading to
36、 invocation of ANF-CINT are considered as implementation options. Examples of factors that can be taken in account are: the source of the call (e.g., the geographic location of the calling user, the network from which the call has entered the PISN); - 4 - the particular interception cause; the type
37、of connection (e.g. the originating user is an attendant); the call destination; time of the day. 6.1.2 Qualifications on applicability to telecommunication services Call Interception is applicable to all basic services defined in ECMA-142. 6.2 Procedures 6.2.1 Provision/withdrawal ANF-CINT shall be
38、 PISN instigated. The conditions under which interception is invoked shall be an implementation matter. Also, parameters and values offered by a PISN shall be an implementation matter. A PISN may offer more or less parameters than the one specified below. Parameters may apply separately to each diff
39、erent condition for which interception is to be invoked. Parameter Value Intercepted-to number (NOTE) - PISN number NOTE This parameter is not needed for conditions where the intercepted-to number is determined on a call by call basis e.g. the number of the user that transferred the call. 6.2.2 Norm
40、al procedures 6.2.2.1 Activation/deactivation/registration/interrogation The feature shall be permanently activated. Registration and interrogation shall not apply. 6.2.2.2 Invocation and operation ANF-CINT shall be invoked for a call if a certain condition, determined by the PISN implementation, is
41、 met. Also the parameters with the invocation request shall be determined by the PISN implementation. Examples of interception causes include: timeout in waiting on busy condition busy user closed user group rejection do not disturb activated incoming barred destination invalid number no compatible
42、user at destination network congestion no reply (i.e. timeout during alerting) called user access out of service route restriction (i.e. calling user not authorized for the route) timeout in waiting on busy condition after transfer no reply after transfer (i.e. timeout during alerting after transfer
43、) upper limit of number of diversions reached upper limit of transit counter reached mobile user location not known mobile user no longer registered mobile terminal not responding - 5 - invalid call diversion destination timeout after call hold. On acceptance of invocation of ANF-CINT, the PISN shal
44、l perform redirection towards the intercepted-to user. If interception is invoked because of detecting a condition that prevents the call reaching an alerting or waiting on busy state (interception immediate) the PISN shall complete the release of the call towards the called user immediately. If int
45、erception is invoked as a result of remaining too long in an alerting or waiting on busy state (interception delayed) the PISN shall not release the call towards the called user until the call to the intercepted-to user enters an alerting or waiting on busy state. The called user can accept the call
46、 during this period. As an implementation option for interception delayed, the PISN may retain the call towards the called user until the intercepted-to user answers the call. Further procedures in this case are outside the scope of this Standard. 6.2.2.2.1 Intercepted-to user notification The inter
47、cepted-to user shall be given a notification that the call has been intercepted. This notification shall include: the interception cause, the called user number/name if available. 6.2.2.2.2 Calling user notifications The calling user shall be given the notification that the call has been intercepted
48、 with the appropriate interception cause. In case of multiple call interceptions, the calling user shall be notified of the first interception and of any subsequent interceptions from intercepted-to users at which an alerting or waiting on busy state has been reached. For single interception, the in
49、tercepted-to users number and, if available, the intercepted-to users name shall be sent to the calling user if CLIR/CNIR is not invoked by the intercepted-to user. For multiple interception, the number and, if available, name of the final intercepted-to user shall be sent to the calling user if CLIR and CNIR respectively has not been invoked by the final intercepted-to user. In addition, if an alerting or waiting on busy state is reached at an intermediate intercepted-to user the number and
