1、BRITISH STANDARD BS EN 28877:1994 Implementation of EN 28877:1993 Information technology Telecommunications and information exchange between systems Interface connector and contact assignments for ISDN Basic Access Interface located at reference points S and T (ISO/IEC 8877:1992) The European Standa
2、rd EN 28877:1993 has the status of a British Standard UDC 681.327.8:621.316.541:621.39BSEN 28877:1994 This British Standard, having been prepared under the directionof the Information Systems Technology Standards Policy Committee, was publishedunder the authority ofthe Standards Board and comesinto
3、effect on 15August1994 BSI 07-1999 The following BSI references relate to the work on this standard: Committee reference IST/6 Draft for comment90/65858 DC ISBN 0 580 23421 5 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Information Sy
4、stems Technology Standards Policy Committee (IST/-) to Technical Committee IST/6, upon which the following bodies were represented: British Computer Society British Telecommunications plc CCTA (the Government Centre for Information Systems) IBM United Kingdom Ltd. Information Systems Committee of th
5、e Universities Funding Council Institution of Electrical Engineers International Computers Limited Logica UK Ltd. Ministry of Defence Rank Xerox Ltd. Swift Project Consortium Amendments issued since publication Amd. No. Date CommentsBSEN 28877:1994 BSI 07-1999 i Contents Page Committees responsible
6、Inside front cover National foreword ii Foreword 2 Foreword ii Text of ISO/IEC 8877 1BSEN 28877:1994 ii BSI 07-1999 National foreword This British Standard reproduces verbatim EN28877:1993 and implements it as the UK national standard. It is a revision of EN 28877:1990 and supersedes BS7266-1:1990 (
7、the English language version of EN28877:1990) which is withdrawn. This British Standard is published under the direction of the Information Systems Technology Standards Policy Committee whose Technical Committee IST/6 has the responsibility to: aid enquirers to understand the text; present to the re
8、sponsible international committee any enquiries on interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. NOTEInternational and European Standards, as well as overseas standards, are available fr
9、om Customer Services, Publications, BSI, Linford Wood, Milton Keynes, MK146LE. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself co
10、nfer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theEN title page, page 2, the ISO/IEC title page, page ii, pages 1 to9 and abackcover. This standard has been updated (see copyright date) and may have had amendments in
11、corporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN28877:1993 September1993 UDC681.327.8:621.316.541:621.39 Supersedes EN28877:1990 Descriptors: Data processing, network interconnection, computer interface, multi-co
12、ntact connectors, plug connectors, socket connectors, specifications, dimensions English version Information technology Telecommunications and information exchange between systems Interface connector and contact assignments for ISDN Basic Access Interface located at reference points S and T (ISO/IEC
13、 8877:1992) Technologies de linformation Tlcommunications et change dinformations entre systmes Connecteur dinterface et affectation des contacts pour linterface daccs de base au RNIS situe aux points de rfrence S et T (ISO/IEC 8877:1992) Informationstechnik Telekommunikation und Informationsaustaus
14、ch zwischen Systemen Steckverbinder und Kontaktbelegung fr die ISDN-Basisanschlu- Schnittstelle an den Bezugspunkten S und T (ISO/IEC8877:1992) This European Standard was approved by CEN on1993-09-06. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the condi
15、tions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three
16、official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austr
17、ia, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue
18、de Stassart 36, B-1050 Brussels 1993 Copyright reserved to CEN members Ref. No. EN28877:1993EEN28877:1993 BSI 07-1999 2 Foreword On the proposal of the CEN Central Secretariat, the Technical Board has decided to submit the International Standard: Information technology Telecommunications and informa
19、tion exchange between systems Interface connector and contact assignments for ISDN Basic Access Interface located at reference points S and T (ISO/IEC8877:1992) to the Unique Acceptance Procedure (UAP). The result of the Unique Acceptance Procedure was positive. For the time being, this document exi
20、sts only in English. This document supersedes EN 28877:1990. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March1994, and conflicting national standards shall be withdrawn at the latest by March
21、1994. In accordance with the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United
22、Kingdom. Contents Page Foreword 2 1 Scope 1 2 Normative references 1 3 Definitions 1 4 Connector 1 5 Assignment of contact numbers 2 6 ISDN basic access TE cord 2 7 4-wire ISDN basic access TE cord 2 Annex A (informative) Interface cabling arrangements 7 Annex B (informative) Optional powering provi
23、sions 9 Annex C (informative) Extract from CCITT Recommendation I.430:1988 9 Annex D (informative) Bibliography 9 Figure 1 Plug 8 pole 3 Figure 2 Jack 8 pole 3 Figure 3 Plug mechanical specification 4 Figure 4 Plug/jack contact specification 5 Figure 5 Jack mechanical specification 6 Figure A.1 Cabl
24、ing and connector arrangements 8 Table Contact assignments for plugs and jacks 2ISO/IEC 8877:1992(E) ii BSI 07-1999 Foreword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. Nat
25、ional bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interes
26、t. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC1. Draft International Standards adopted by the joint technic
27、al committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least75% of the national bodies casting a vote. International Standard ISO/IEC8877 was prepared by Joint Technical Committee ISO/IEC JTC1, Information technology. This second e
28、dition cancels and replaces the first edition ISO8877:1987 and ISO8877:Amd.1:1991. Annex A, Annex B, Annex C and Annex D of this International Standard are for information only.ISO/IEC 8877:1992(E) BSI 07-1999 1 1 Scope This International Standard specifies the 8-pole connector (plug and jack) and t
29、he assignments of poles/contacts for use in physical interfaces of Integrated Services Digital Network (ISDN) basic access arrangements. These physical interfaces may be located at reference points S and T between TEs and NTs and between NT1s and NT2s and shall conform to CCITT RecommendationI.430.
30、This International Standard also specifies the requirements for ISDN basic access cords for use with TEs that conform with RecommendationI.430, where the specification of the TE calls for the use of such a cord. CCITT RecommendationI.430 requires plugs and jacks on equipment connecting cords and int
31、erface cables as shown in Figure2/I.430 of that Recommendation (also see Annex A). For the purpose of this International Standard, when viewed from an NT1, an NT2 may be considered to be a TE. NOTEThis International Standard specifies connector dimensions but only those to ensure mateability of the
32、plug and jack. Complete detailed specifications of the plugs and jacks and all other dimensions are specified in IEC603-7 (see Annex D) 2 Normative references The following International Standards and CCITT Recommendations contain certain provisions that, through reference in this text, constitute p
33、rovisions of this International Standard. At the time of publication, the editions indicated were valid. All International Standards and CCITT Recommendations are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of appl
34、ying the most recent editions of the Standards/Recommendations indicated below. Members of international standards bodies maintain registers of currently valid International Standards and CCITT Recommendations. CCITT Recommendation I.411:1988, ISDN user network interface Reference configurations. CC
35、ITT Recommendation I.420:1988, Basic user network interface. CCITT Recommendation I.430:1988, Basic user network interface Layer1 specification. NOTESection8.9 of the above Recommendation is reproduced for information as Annex C to this International Standard. 3 Definitions For the purposes of this
36、International Standard the following definitions apply: 3.1 pole a position for a contact 3.2 contact the electrical contact element which, for many connections, is referred to as a “pin” 3.3 plug and jack the male and female connector pads, respectively examples of interface cabling configurations
37、are given in Annex A 4 Connector Eight-pole connectors are specified for the interconnection of TEs and NTs. One plug and jack pair is used for the interconnection of TEs and NTs. One plug and jack pair is used to connect the TEconnecting cord to the interface cable (at interface point I Ain CCITT R
38、ecommendationI.430, Figure2/I.430) and a second connector is used (optionally) to connect the NT connecting cord to the interface cable (at interface point I Bin CCITT RecommendationI.430, Figure 2/I.430). Interface cabling may have a passive bus or a point-to-point configuration. (Both configuratio
39、ns are illustrated in Annex A.) NOTEThe interface cable may be directly connected to an NT or, where the NT is a mutli-port device, e.g. a PABX the connection to the NT may involve a large connector which accommodates multiple interfaces TE and NT connecting cords shall be terminated in plugs. Figur
40、e 1 illustrates the cord-terminating plug which provides for4,6 or8 contacts. The number of physical contacts provided or required is dependent upon the use by the associated equipment, TE or NT, of the optional provisions for powering across the interface. The optional powering capabilities are des
41、cribed in CCITT RecommendationI.430 and are summarized here in Annex B. Interface cables shall be terminated in jacks. Figure 2 illustrates the jack which provides4,6 or8 contacts. As with the cord terminating plug, the number of contacts provided or required is dependent upon the provision for the
42、powering options discussed in Annex B.ISO/IEC 8877:1992(E) 2 BSI 07-1999 Connector dimensions necessary to assure mating of plugs and jacks are specified in Figure 3 through Figure 5. Connectors for use in the applications covered by this International Standard shall conform to the mechanical dimens
43、ions specified in these figures and no additional provisions for keying shall be provided. Figure 3 gives the mechanical specification for mating of the8-pole plug. Figure 4 gives the plug/jack contact specification for mating. Figure 5 gives the mechanical specification for mating of the8-pole jack
44、. While physical contacts are indicated for poles1,2,7 and8 of the plug and jack, contacts corresponding to these numbers are not required in some applications and, in such applications, may be omitted. 5 Assignment of contact numbers Four contact numbers are assigned for the conductors of the two p
45、airs used for the signal transmission from NT to TE and from TE to NT. Two contacts each are assigned for TRANSMIT and RECEIVE directions at TEs and, correspondingly, to RECEIVE and TRANSMIT directions at NTs. Contacts are also assigned, for sources and sinks at TEs and NTs, individually, for the tw
46、o optional conductor pairs used for powering TEs from NTs or from other TEs (or NTs from TEs). The provision of twisted pairs for TRANSMIT and RECEIVE circuits and of conductors for powering shall be in conformance with CCITT RecommendationI.430, in all applications. The assignments applicable to th
47、e interface on the NT1 side of NT2s shall be the same as for the interface at TEs. The contact number assignments for plugs and jacks are given in the Table. The individual contact, for each conductor pair, is designated “+” or “”. For TRANSMIT and RECEIVE pairs, the contact designated “+” indicates
48、 the conductor (lead in RecommendationI.430) of the pair for which the framing pulse should be relatively positive. However, it is unnecessary to distinguish the individual conductors of transmit and receive circuit pairs in interface cables or extension cords in point-to-point interconnections. For
49、 pairs used for powering across the interface (seesource1 or2 in section9 of CCITT RecommendationI.430), the contact designated “+” indicates the conductor (lead in CCITT RecommendationI.430) of the pair that carries the relatively positive dc voltage. Table Contact assignments for plugs and jacks NOTEFor its use in TE-to-TE interconnections, power source/sink3 shall conform to the requirements, specified in CCITT RecommendationI.430, section9.2, for power source2. 6 ISDN basic access TE cord Unless sp
