1、EUROPEAN COMPUTER MANUFACTURERS ASSOCIATIONSTANDARD ECMA-157PRIVATE TELECOMMUNICATION NETWORKS-SIGNALLING PROTOCOL AT THE S REFERENCE POINT-IDENTIFICATION SUPPLEMENTARY SERVICES(PTN SSIG-ID)2nd Edition - June 1993.EUROPEAN COMPUTER MANUFACTURERS ASSOCIATIONSTANDARD ECMA-157PRIVATE TELECOMMUNICATION
2、NETWORKS-SIGNALLING PROTOCOL AT THE S REFERENCE POINT-IDENTIFICATION SUPPLEMENTARY SERVICES(PTN SSIG-ID)2nd Edition - June 1993.Brief HistoryThis Standard is one of a series of ECMA standards defining services and signalling protocols applicable to PrivateTelecommunication Networks (PTNs). The serie
3、s uses the ISDN concepts as developed by the ITU-TS and is also within theframework of standards for open systems interconnection as defined by ISO. It has been produced under Bon de commande75D.6.This particular Standard specifies the signalling protocol for use at the S reference point in support
4、of the Calling LineIdentification Presentation, Connected Line Identification Presentation and Calling/Connected Line Identification Restrictionsupplementary services.The protocol defined in this Standard is based upon that specified in ETS 300 092, ETS 300 093, ETS 300 097 and ETS300 098. Those fou
5、r ETSs are applicable to interfaces to public ISDNs at the T reference point, or at coincident S and Treference points if there is no NT2 function. The major part of the protocol specified in this Standard is identical to thatspecified in those four ETSs, enabling TEs to be designed which can be con
6、nected to PTNs and to public ISDNs. Annex Agives further information on terminal interchangeability.This Standard is based upon the practical experience of ECMA member companies and the results of their active andcontinuous participation in the work of ISO/IEC JTC1, ITU-TS, ETSI and other internatio
7、nal and national standardizationbodies. It represents a pragmatic and widely based consensus.Compared to the 1st Edition of Standard ECMA-157 (published by ECMA in June 1991), various changes have been made inorder to achieve alignment with ETS 300 191 (which is based on the 1st Edition of ECMA-157
8、but modified during PublicEnquiry and published by ETSI in December 1992).Accepted as 2nd Edition of Standard ECMA-157 by the General Assembly of June 1993.- i -Table of contentsPage1Scope 12 Conformance 13 References 14 Definitions 14.1 General 14.2 Incoming call 14.3 Outgoing call 15 List of acron
9、yms 16 Signalling protocol for the support of SS-CLIP 26.1 SS-CLIP description 26.2 SS-CLIP operational requirements 26.2.1 Provision/withdrawal 26.2.2 Requirements on the Originating Network Side 26.2.3 Requirements on the Destination Network Side 26.3 SS-CLIP coding requirements 26.4 SS-CLIP state
10、 definitions 26.5 SS-CLIP signalling procedures at the S reference point 26.5.1 Activation, deactivation, registration and interrogation 26.5.2 Actions at the Originating TE 26.5.3 Actions at the Originating PTNX 26.5.4 Actions at the Destination PTNX 36.5.5 Actions at the Destination TE 36.6 SS-CLI
11、P impact of interworking with public ISDNs 46.7 SS-CLIP impact of interworking with non-ISDNs 46.8 SS-CLIP parameter values (timers) 47 Signalling protocol for the support of SS-COLP 47.1 SS-COLP description 47.2 SS-COLP operational requirements 47.2.1 Provision/withdrawal 47.2.2 Requirements on the
12、 Originating Network Side 47.2.3 Requirements on the Destination Network Side 47.3 SS-COLP coding requirements 57.4 SS-COLP state definitions 57.5 SS-COLP signalling procedures at the S reference point 57.5.1 Activation, deactivation, registration and interrogation 57.5.2 Actions at the Originating
13、TE 57.5.3 Actions at the Originating PTNX 57.5.4 Actions at the Destination PTNX 67.5.5 Actions at the Destination TE 6- ii -7.6 SS-COLP impact of interworking with public ISDNs 67.7 SS-COLP impact of interworking with non-ISDNs 67.8 SS-COLP parameter values (timers) 68 Signalling protocol for the s
14、upport of SS-CLIR 68.1 SS-CLIR description 68.2 SS-CLIR operational requirements 78.2.1 Provision/withdrawal 78.2.2 Requirements on the Originating Network Side 78.2.3 Requirements on the Destination Network Side 78.3 SS-CLIR coding requirements 78.4 SS-CLIR state definitions 78.5 SS-CLIR signalling
15、 procedures at the S reference point 78.5.1 Activation, deactivation, registration and interrogation 78.5.2 Actions at the Originating TE 78.5.3 Actions at the Originating PTNX 88.5.4 Actions at the Destination PTNX 88.5.5 Actions at the Destination TE 98.6 SS-CLIR impact of interworking with public
16、 ISDNs 98.7 SS-CLIR impact of interworking with non-ISDNs 98.8 SS-CLIR parameter values (timers) 9Annex A - Terminal Interchangeability between Public and Private ISDNs 11Annex B - Protocol Implementation Conformance Statement (PICS) Proforma 13Annex C - Specification and Description Language (SDL)
17、- Representation of Procedures 19Annex D - Other References 211ScopeThis Standard specifies the signalling protocol for the support of identification supplementary services at an interfaceat the S reference point between a Terminal Equipment (TE) and a Private Telecommunication Network (PTN). ThePro
18、tocol specified in this Standard is an extension of the layer 3 protocol for the support of circuit mode basic services,as specified in ETS 300 192. The identification supplementary services concerned are Supplementary Service CallingLine Identification Presentation (SS-CLIP), Supplementary Service
19、Connected Line Identification Presentation(SS-COLP) and Supplementary Service Calling / Connected Line Identification Restriction (SS-CLIR).Service specifications are produced in three stages, according to the method specified in ENV 41005. This Standardsatisfies the requirements identified by the s
20、tage 1 and stage 2 specifications in ECMA-148. This Standard isapplicable to user accesses of PTNXs and to TEs which are intended for connection to PTNs.The impact on the protocol of interactions between the supplementary services specified in this Standard and othersupplementary services is outside
21、 the scope of this Standard.2 ConformanceIn order to conform to this Standard, a PTNX shall satisfy the requirements identified in the Protocol ImplementationConformance Statement (PICS) proforma in clause B.3 of annex B.In order to conform to this Standard, a TE shall satisfy the requirements ident
22、ified in the Protocol ImplementationConformance Statement (PICS) proforma in clause B.4 of annex B.3 ReferencesECMA-148 Private Telecommunication Networks (PTN) - Specification, Functional Model and InformationFlows - Identification Supplementary Services (ISSD) (1993)ETS 300 102-1 Integrated Servic
23、es Digital Network (ISDN); User-network interface layer 3; Specification forbasic call control; Application of CCITT Rec. Q.930/I.450 and Rec. Q.931/I.451 (1990)ETS 300 189 Private Telecommunication Network (PTN); Addressing (1992)ETS 300 192 Private Telecommunication Network (PTN); Signalling proto
24、col at the S-reference point; Circuitmode basic services (1992)ENV 41005 Method for the specification of basic and supplementary services of private telecommunicationnetworks (1990)ENV 41007-1 Definition of terms in private telecommunication networks, Part 1: Definition of general terms(1991)CCITT R
25、ec. I.112 Vocabulary of terms for ISDNs (1988)4 Definitions4.1 GeneralFor the purpose of this Standard, the terminology defined in ENV 41007-1 and Rec. I.112 applies. If there isconflict, the definitions in ENV 41007-1 shall take precedence. In addition the following definitions apply.4.2 Incoming c
26、allA call presented to the TE by the PTN.4.3 Outgoing callA call presented to the PTN by the TE.5 List of acronymsISDN Integrated Services Digital NetworkPICS Protocol Implementation Conformance StatementPTN Private Telecommunication Network- 2 -PTNX Private Telecommunication Network ExchangeSS-CLIP
27、 Supplementary Service Calling Line Identification PresentationSS-CLIR Supplementary Service Calling / Connected Line Identification RestrictionSS-COLP Supplementary Service Connected Line Identification PresentationTE Terminal Equipment6 Signalling protocol for the support of SS-CLIP6.1 SS-CLIP des
28、criptionCalling Line Identification Presentation (SS-CLIP) is a supplementary service which is offered to the called user andwhich provides the calling users number, and subaddress if available, to the called user.The PTN provides the called user with the number of the calling user whenever an incom
29、ing call is presented. Thenumber provided should be sufficient to enable the called user to return the call.The calling users number may be accompanied by a subaddress.6.2 SS-CLIP operational requirements6.2.1 Provision/withdrawalSS-CLIP shall be available to all PTN users with the ability to receiv
30、e this information. There is no need forservice profile control.Some PTN users may be given a service profile which permits the override of calling line identificationrestriction.6.2.2 Requirements on the Originating Network SideThere are no special requirements for SS-CLIP beyond the basic call pro
31、cedures specified in ETS 300 192.NOTE 1As part of basic call procedures at the Originating TE-PTN interface, the TE may supply the calling usersnumber and/or the calling users subaddress to the PTN. The PTN can use this information to derive theinformation needed to provide SS-CLIP at the Destinatio
32、n TE-PTN interface (see ETS 300 189).6.2.3 Requirements on the Destination Network SideThe special requirements detailed in subclause 6.5 for SS-CLIP are in addition to the basic call proceduresspecified in ETS 300 192.6.3 SS-CLIP coding requirementsThe Calling party number information element shall
33、 be encoded as specified in ETS 300 192, subclause 12.5.10.This information element can occur in the SETUP message in the direction PTN to TE for the support of SS-CLIP.The Calling party subaddress information element shall be encoded as specified in ETS 300 192, subclause 12.5.11.This information e
34、lement can occur in the SETUP message in the direction PTN to TE for the support of SS-CLIP.6.4 SS-CLIP state definitionsNo specific state definitions are required.6.5 SS-CLIP signalling procedures at the S reference point6.5.1 Activation, deactivation, registration and interrogationNot applicable.6
35、.5.2 Actions at the Originating TENot applicable.6.5.3 Actions at the Originating PTNXNot applicable.- 3 -6.5.4 Actions at the Destination PTNX6.5.4.1 Normal proceduresNOTE 2The text of this subclause is based upon that of subclause 9.5.1 of ETS 300 092. Differences are indicated byemboldening.When
36、a SETUP message is sent to the called TE according to the procedures of ETS 300 192, the PTNshall check to see if the Calling users number is available.If the calling users number is available and presentation is allowed according to the presentation indicatorsupplied together with the calling users
37、 number, the PTN shall include the Calling party number informationelement in the SETUP message sent to the called TE. If available, the PTN shall also include the Callingparty subaddress information element in the SETUP message. The presentation and screening indicatorsassociated with the calling u
38、sers number received at the Destination PTNX shall be passed transparently tothe called TE. Values for use in the numbering plan identifier and type of number fields shall be inaccordance with ETS 300 189.If the calling users number is available, but presentation is not allowed according to the pres
39、entationindicator supplied together with the calling users number, the PTN shall include the Calling party numberinformation element in the SETUP message sent to the called TE. The presentation indicator in the Callingparty number information element shall indicate “presentation restricted“. The scr
40、eening indicator shallindicate “network provided“. The type of number and the numbering plan identification shall be set to“unknown“ and the number digits field shall not be included. The PTN shall include the Calling partysubaddress information element, if available, in the SETUP message.If the cal
41、ling users number is not available at the destination PTNX the PTN shall include the Calling partynumber information element in the SETUP message sent to the called TE. The presentation indicator shall beset to “number not available due to interworking“ or “presentation restricted“, according to inf
42、ormationavailable, the screening indicator shall be set to “network provided“, the type of number and the numberingplan identification shall be set to “unknown“ and the number digits field shall not be included. The PTN shallinclude the Calling party subaddress information element, if available, in
43、the SETUP message.If presentation is restricted but the called PTN user has the override category (e.g. police or emergencyservice) marked in the Destination PTNX, the PTN shall include the Calling party number informationelement, and Calling party subaddress information element if the subaddress wa
44、s supplied by the calling PTNuser, in the SETUP message. In this case, the presentation and screening indicators shall be passedtransparently to the called TE. Values for the use in the numbering plan identifier and type of numberfields shall be in accordance with ETS 300 189.NOTE 3The Specification
45、 and Description Language (SDL) representation of the procedures at the Destination PTNXis contained in clause C.1 of annex C.6.5.4.2 Exceptional proceduresNot applicable.6.5.5 Actions at the Destination TEThe use of the Calling party number and Calling party subaddress information elements, if pres
46、ent in a receivedSETUP message, is an implementation matter.NOTE 4If the presentation indicator in the Calling party number information element is set to “number not available dueto interworking“ or “presentation restricted“, the remaining information in octets 3 and 3a of the Calling partynumber in
47、formation element should be ignored, except where, in the context of the override category, numberinformation in octet 4 has been provided.- 4 -6.6 SS-CLIP impact of interworking with public ISDNsThe procedures specified in subclause 6.5 shall be used.NOTE 5In addition to other factors, the availabi
48、lity of the calling users number and subaddress from the public ISDN willdepend upon subscription to the public ISDNs SS-CLIP.NOTE 6Some public ISDNs may provide two calling user numbers in some circumstances. The first of these numbers (i.e.the one appearing in the first Calling party number inform
49、ation element in the SETUP message received from thepublic ISDN) will be used for the provision of SS-CLIP to the called user.NOTE 7On outgoing calls to a public ISDN, the provision of the calling users DDI number to the public ISDN can assist inthe provision of SS-CLIP to the called user.6.7 SS-CLIP impact of interworking with non-ISDNsThe procedures specified in subclause 6.5 shall be used.NOTE 8Some non-ISDNs are unable to provide the calling users number and subaddress.NOTE 9Some non-ISDNs can provide the calling users number but without any indication of whether presentat
