1、I W 3404583 0020739 3 L . STANDARD FINAL DRAFT prETS 300 064 M8y 1991 UDC: Koy words: Integrated Services Digital Network (ISDN); Direct Dialling In (DDI) supplementary service Digital Subscriber Signalling System No. one (DSSI) protocol . ETSI European Telecommunications Standards Institute ETSI Se
2、cretariat: B.P.152 . F - 06561 Valbonne Cedex . Frarce TP. + 33 92 94 42 O0 TF. + 33 93 65 47 16 Tx. 47 O0 40 F European Telecommunications Standards Institute 1991. All rights reserved. No part may be reproduced or used except as authorised by contract or other written permission. The Copyright and
3、 the foregoing restriction on reproduction and use extend to all media in which the information may be embodied. W 3404583 0020720 T P8gO 2 Find Draft prETS 300 OMA991 2 Whilst every care has been taken in the preparation and publication of this document, errors in content, typographical or otherwis
4、e, may occur. if you have comments concerning its accuracy, please write to TiSI Standards Management Dept.“ at the address shown on the title page. E 3404583 0020723 3 = Paga 3 Final Draft prETS 300 OMA991 Contents FOTeword 5 1 . Scope . 7 2 Normative references 7 3 Definitions 8 4 Symbols 8nd abbr
5、eviations . 8 5 Description 8 6 Operational requirements . 9 Provision and withdrawal 9 Requirements on the originating network side 9 Requirements on the destination network side . 9 7 Coding requirements . 9 6.1 6.2 6.3 . 8 State definitions 9 9 Signalling procedures at the coincident S and T refe
6、rence point 9 10 Procedures for interworking with private ISDNs 9 10.1 10.2 Activation. deactivation and registration 9 Delivery of the DDI number . 9 10.2.1 Normal operation 9 10.2.2 Exceptional procedures . 10 11 . interactions with other nefH(K. . 10 12 Interactions with other supplementary .rvic
7、ec . 10 13 Parameter values (timers) . 10 14 ynamic description (SOLS) 10 Annex A (informative) Signalling flows . 11 91 /95 70 3 PI00 4 Find Drdt prETS 300 064:1991 Blank page . 91 /95170 4 rn 3404583 0020723 5 rn PIO0 5 Find Drrft prwS 300 064:1991 Foreword This draft European Telecommunication St
8、andard (ETS) has been produced by the Signalling Protocols 6. Switching (SPS) Technical Committee of the European Telecommunications Standards Institute (ETSI). In accordance with CCTTT Recommendation 1.130 2, the following three level structure is used to describe the supplementary telecommunicatio
9、ns services as provided by European public telecommunications oporators under the pan-European Integrated Services Digital Network (ISDN): - Stage 1: is an overall service description, from the users standpoint, - Stage 2: identifies the functional capabilities and information flows needed to suppor
10、t the service described in stage 1, and - Stage 3: defines the signalling system protocols and switching functions needed to implement the service described in stage 1. This standard details the stage 3 aspects (signalling system protocols and switching functions) needed to support the Direct Dialli
11、ng In (DDI) supplemenWy service. The stage 1 and stage 2 aspects are detailed in draft ETS 300 062 (1991) and draft ETS 300 063 (1991), respectivey. 91 /95170 5 3404583 0020724 7 M Page 6 Fin81 Drrft prETS 300 0641991 Blank page 6 9 1 /95170 . I 3404583 0020725 9 I Pig0 7 Find Drift prETS 300 064:19
12、91 1 Scope This standard specifies the stage three of the Diroct Dialling In (DDI) supplementary service for the pan-European Integrated Services Digital Network (ISDN) as provided by European public tolecommunications operators at tho T roference point or coincident S and T reference point (as defi
13、ned in CCTTT Rocommendation 1.411 i) by means of the Digital Subscriber Signalling System No. one (DSS1). Stage three identifies the protocol procedures and switching functions nmded to support a telecommunications service (see CCTTT R-ndation 1.130 2). The DDI supplementary sowice enables a usor to
14、 call directly via a public ISDN a user on a private ISDN by using the public ISDN numbering plan. lhe DDI supplementary service is applicable to 911 telecommunications senrices. Further part(s) of this standard specify the method of Wng raquirod to identify conforhancc to this standard. This standa
15、rd is applicable to equipment supporting the DDI supplementary service, to be attached at either side of a T reference point or coincident S and T reference points when used as an access to the public ISDN. 2 Normative references This ETS incorporates by dated or undated reference, provisions from o
16、ther publications. These normative references are cited at the appropriate places in the text and the publications listed hereafter. For dated references, subsequent amendments to, or revisions of any of these publications apply to this ETS onty when incorporated in it by amendment or revision. For
17、undated references the latest edition of the publication referred to applies. 141 CCTTT Recommendation 1.411 (1988): WDN user-network interfaces - Ref er once configurations“ . CCTTT Recommendation 1.130 (1988): “Method for the characterisation of telecommunication services supported by an ISDN and
18、network capabilities of an ISDN+. CCRT Recommendation E.164 (1988): YNumbering plan for the ISDN era“. ETS 300 102-1 (1990): “ISDN user-network interface layer 3 specification for basic call controlH. ETS 300 102-2 (1990): WDN usernetwork interface layer 3 specification for basic call control - SDL
19、diagramsY. ETS T/S 46-332: *Supplementary mico interactions*. CCTTT Rccomrnmdation 1.112 (1988): “Vocabulary of tem for ISDNs“. CCTTT Recommendation 1.210 (1988): “Principles of telecommunication services supported by UI ISDN and the means to describe them“. 91 /c)5170 7 3404583 O020726 O W Prgo 8 F
20、lnrl Drrft prETS 300 064:1991 3 Definitions For the purposes of this standard, the following definitions apply: Intogrrtod Sowlcor Digltrl Notwork (ISDN): see CCTTT Recommendation 1.112 m, 5 2.3, definition 308. Sowlco; tolocommunlcrtionr rowlto: see CCTTT Flecommndation 1.112 m, 5 2.2, definition 2
21、01. Supplomontrry 8orvlco: se% CCTTT Recommendation 1.210 8, 5 2.4. Notwork: the DSSl protocol entity at the network side of the usernetwork interface. Utor: the DSSl protocol entity at the user side of the usernetwork interface. - ISDN numbw: a number conforming to the numbering plan and structure
22、specified in CCTTT Recommendation E.164 131. Internrtionrl numbor: an ISDN number structured as specified in, Q 3.2 (in the paragraphs relating to international number) of CCIIT Recommendation E.164 131. Natlonrl numbor ; Nrtionrl rlgnlflcrnt numbor: an ISDN number structured as specified in, 5 3.2,
23、 (in the paragraphs relating to national significant number) of CCI“ Recommendation E.164 131. Subscribor numbor: an ISDN number structured as specified in, Q 3.2, (in the paragraphs relating to subscriber number) of CCTTT Recommendation E.164 131. DDI numbor: the DDI number shall be at least that p
24、ari of the ISDN number which shall be significant to the private ISDN. NOTE: National or international prefixes cannot form pari of the OD1 number. 4 Symbols and abbreviations ISDN Integrated Services Digital Network. DDI Direct Dialling In. DSSl Digital Subscriber Signalling System No. one. PSTN Pu
25、blic Switched Telephone Network. 5 Description The DDI supplementary sewice shall be based on the use of the ISDN number and shall not include subaddressing. NOTE: CCTTT Recommendation E.164 3 provides the flexibility to administrations to uso national numbering plans of fixed or variable number len
26、gths. This flexibility also applies to OD1 numbers. In networks with an open numbering plan, the length of the DDI number can be unknown to the servicing local exchange or to any other entity of the public network. The DDI number shall be transferred en-bloc or by overlap receiving from the network
27、to the user, which shall finally and automatically establish a call to the destination without assistance of an operator. 8 91 /y51 /O W 3404583 0020727 2 P8flO 9 Find Drrft prETS 300 OMA991 6 Operational requirements 6.1 Provltlon and wlthdriwrl The DDI supplementary service shall be provided after
28、 prior umgemnt with the administration and shall be withdrawn on the subscribers roqw-st or for adminstrathre reasons. NOTE: Subscription to the multiple subscriber number and DDI urpplemntary services is mutualb exclusive. However, in som networks both supplementary mrvicss could coaxkt on the sama
29、 access (e.$ for future oxtension of smiw provision). 6.2 The basic call control procedures according to ETS 300 102-1 141, subclause 5.1 shall .pply. Roqulromonts on tho orlglnrting nowork rldo 6.3 Roqulromontr on tho dortinrtlon network tldo When the DDI supplementary service is provided to the ca
30、lled user, at least the DDI number shall be passed to the user in the Called party number information element, The en-bloc or the overlap receiving procedure shall be used to transfer the number information according to the rules specified in ETS 300 102-1 4, subclause 5.2. 7 Coding requirements The
31、 Called party number information dement coded as in ETS 300 102-1 (41, subclause 4.5.8, shall be used to indicate the DDI number. 8 State definitions The states associated with basic call control according to ETS 300 102-1 4 shall apply. 9 Not applicable. Signalling procedures at the coincident S an
32、d T reference point NOTE: tf the network knows that M equipment attached to the access is not a private ISDN, then it das not need to implement the procedures of clause 10 and eus does not need to provide the DDI supplemenw service for that access. H the network does not know whether the attached eq
33、uipment is a terminal or a private network then the procedures of claw 10 should be provided to that access if the DDI supplementary service is subscribed. 10 Procedures for interworking with private ISDNs . 10.1 Activation, doictivrtlon and roglrtrrtlon Not applicable. 10.2 10.2.1 Normal oporrtlon
34、Dollvory of tho DDI numbor The DDI number shall be delivered from the network to the called user in the “number digis“ field of the Called party number information element, according the procedures of ETS 300 102-1 141, subclause 5.2. 91 /95170 340453 0020728 4 P8gO 90 Finri Drift prETS 300 OUA991 .
35、 In the caw where only the latter part of the SDN number Is sent to the called werl the network shall code the “numbering plan identificationW field as WISDN/telephony numbering plan (CCn Recommendation E.164/E.163)It and the “type of number“ field as “unknown“. In the case where the full ISDN numbe
36、r is sent to the called user, the network shall code the “numbering plan identification“ field as “ISDNhelephony numbering plan (CCm Recommendation E.164/E.163)11 and the Yype of numberw field as wnationaI number“. %ternational numbert1 or Ysubscriber numberll. NOTE: This coding is independent of th
37、e use of en-bloc procedures (where the Called pm number is sent in I single message) or overlap receiving procedures (whero the Called pady number is mnt in segments in several messages as it becomes available). 10.2.2 . . Excoptionrl procoduror The exceptional procedures of basic call shall apply (
38、see ETS 300 102-1 4). NOTE: As an alternative to clearing the call when incomplete or invalid digits are received, the user may accept the call. This has no impact on the protocol at the user-network access. The proceduras at the user (DSS1 protocol entity in a private network) where correct ISDN nu
39、mbers received within the Called pariy number information element do not match a destination in a private network are outside the scope of this standard. 11 Interactions with other networks No special requirements for Interadon with other networks are necessary. NOTE: The DDI supplementary senrice m
40、ay be used to enable successful terminal selection within the private ISDN when some compatibility information is absent when a call originates in a PSTN. 12 Interactions with other supplementary services The interactions of the DDI supplementary service with other supplemenw senrices shall be as sp
41、ecified in ETS TIS 46-332 6. 13 Parameter values (timers) The timers associated with basic call control according to ETS 300 102-1 SI shall apply. 14 Dynamic description (SOLS) ETS 300 102-2 151 shall apply. 3404583 0020729 b Page 11 Find Drrft prETS 300 064:1991 Annex A (informative) Signalling flo
42、ws No DDI supplementary mice specific signalling flow is necesary in addition to basic call control according to ETS 300 102-1 14). 91 1951 70 II , May 1991 U 3404583 O020730 2 U Vote V 8: 1991-05-27 to 199147-19 . 1. Pago 12 Find Df8ft prETS 300 064:1991 Document history Juiy 1990 I Public Enquiry 1 PE 13:1990-07-16 to 1990-12-10 91 /95170
