1、CEN EN*Z8877 93 3404589 0068344 TO9 BRITISH STANDARD 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
2、: 1992) The European Standard EN 28877 : 1993 has the status of a British Standard I;DC 681.32T.8 : (521.316.541 : 621.39 BS EN 28877 : 1994 COPYRIGHT European Committee for StandardizationLicensed by Information Handling Services CEN ENx28877 93 = 3404589 0068345 945 BS EN 28877 : 1994 National for
3、eword This British Standard reproduces verbatim EN 28877 : 1993 and implements it as the UK national standard. It is a revision of EN 28877 : 1990 and supersedes BS 7266 : Part 1 : 1990 (the English language version of EN 28877 : 1990) which is withdrawn. This British Standard is published under the
4、 direction of the Information Systems Technology Standards Policy Committee whose Rchnical Committee IST/G has the responsibility to: - aid enquirers to understand the text; - present to the responsible international committee any enquiries on interpretation, or proposals for change, and keep UK int
5、erests informed; - monitor related international and European developments and promulgate them in the UK. NOTE. International and European Standards, as well as overseas standards, are available from Customer Services, Publications, BSI, Linford Wood, Milton Keynes, MK14 6LE. Compliance with a Briti
6、sh Standard does not of itself confer immunity from legal obligations. COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesCEN ENx28877 93 3404589 OOb81Yb 881 EUROPEAN STANDARD NORME EUROPENNE EN 28877 : 1993 EUROPISCHE NORM September 1993 UDC 681.327.8 : 621.316
7、.541 : 621.39 Supersedes EN 28877 : 1990 Descriptors: Data processing, network interconnection, computer interface, multi-contact connectors, plug connectors, socket connectors, specifications, dimensions English version Information technology - Telecommunications and information exchange between sy
8、stems - Interface connector and contact assignments for ISDN Basie Access Interface located at reference points S and T (ISO/IEC 8877 : 1992) Technologies de linformation - Blcommunications et change dinformations entre systmes - Connecteur dinterface et affectation des contacts pour linterface dacc
9、s de base au RNIS situe aux points de rfrence S et T (ISO/IEC 8877 : 1992) Informationstechnik - Telekommunikation und Informationsaustausch zwischen Systemen - Steckverbinder und Kontaktbelegung fr die ISDN-Basisanschlu- Schnittstelle an den Bezugspunkten S und T (ISOIEC 8877 : 1992) This European
10、Standard was approved by CEN on 1993-09-06. CEN members are bound to comply with the CENCENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning s
11、uch national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own languag
12、e and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and Uni
13、ted Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 1993 Copyright reserved to CEN members Ref. No. EN 28877 : 1993 E COPYRIGHT European Committee for StandardizationLicensed
14、by Information Handling ServicesCEN EN+28877 93 3404589 0068347 718 Page 2 EN 28877 : 1993 Foreword On the proposal of the CEN Central Secretariat, the Technical Board has decided to submit the International Standard: Information technology - Tekcommunications and infmation exchange between systems
15、- Interface connector and contact assignments for ISDN Basic Access Interface located at refweme points S and T (ISOAEC 8877 : 1992) to the Unique Acceptance Procedure (UAP). The result of the Unique Acceptance Procedure was positive. For the time being, this document exists only in English. This do
16、cument 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 March 1994, and conflicting national standards shail be withdrawn at the latest by March 1994. In accordance with
17、 the CENXENELEC 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 Kingdom. COPYRIGHT Europ
18、ean Committee for StandardizationLicensed by Information Handling ServicesCEN ENt28877 93 3404589 0068148 b54 I N TER NAT I O NA L S TA N DA R D ISO/IEC 8877 Second edition 1992-1 1-1 5 Information technology - Telecommunications and information exchange between systems - Interface connector and con
19、tact assignments for ISDN Basic Access Interface located at reference points S and T Technologies de linformation - Tlcommunications et change dinformations entre systmes - Connecteur dinterface er affectation des contacts pour linterface daccs de base au RNIS situe aux points de rfrence S et T Refe
20、rence number iSO/iEC 8877:1992(E) COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesCEN ENS28877 93 3404589 00bL49 590 ISO/IEC 8877:1992(E) Foreword IS0 (the International Organization for Standardization) and IEC (the Inter- national Electrotechnical Commissio
21、n) form the specialized system for worldwide standardization. National bodies that are members of IS0 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. IS0 and
22、 IEC technical commit- tees collaborate in fields of mutual interest. Other international organiza- tions, governmental and non-governmental, in liaison with IS0 and IEC, also take part in the work. In the field of information technology, IS0 and IEC have established a joint technical committee, ISO
23、IEC JTC 1. Drafi International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an Intemational Standard requires approval by at least 75% of the national bodies casting a vote. International Standard ISOAEC 8877 was prepared by Joint Te
24、chnical Committee ISOAEC JTC 1, Infomtation technology. This second edition cancels and replaces the first edition IS0 8877:1987 and IS0 8877:Am. 1 : 1991 . Annexes A, 6, C and D of this International Standard are for information only. O ISO/IEC 1992 All rights resenred. No part of this publicam may
25、 be reproduced or Utili in any form or by any means, electronic or mechanical, including photocopying or microfilm, without permission in writing formthepublisher. ISOIIEC CmM office Ca Postale 56 O CH-121 1 GeRbW! 20 Switzerland Printed in Switzerland COPYRIGHT European Committee for Standardizatio
26、nLicensed by Information Handling ServicesCEN EN*Zi 73 = 3404589 00b8L50 202 INTERNATIONAL STANDARD ISO/iEC 8877: 1992( E) Information tech no1 ogy - Telecommunications and information exchange between systems - Interface connector and contact assignments for ISDN Basic Access Interface located at r
27、eference points S and T 1 Scope This International Standard specifies the - The plug at each end of the cord shall be an 8-pole COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesCEN EN*28877 93 3404589 0068352 085 ISO/IEC 8877:1992(E) plug as specified in claus
28、e 4 and figures i, 3, and 4, but with physical contacts fitted only in contact positions 3, 4, 5, and 6. Contacts shall not be fitted in positions 1, 2, 7 and 8. - contact assignmenis for conductors and pairs shall be as specified in the table in clause 5 for contact numbers 3,4, 5 and 6. NOTE - Omi
29、ssion of contacts from positions 1, 2, 7 and 8 IS lo permit visual identification of the Qwire cord. 3 COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesCEN EN828877 93 m 3404589 00bL53 TLL m ISO/IEC 8877:1992(E) NOTE - This portion of the plug illustrates a st
30、ructure necessary for securing the cordage and is not pertinent to proper mating with the jack. Figure 1 - Plug - 8 pole - Figure 2 - Jack - 8 pole 4 COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesCEN EN*28877 93 3404589 0068354 958 In y s o .- C t In L .- C
31、 L - v) - .- E - ._ E .- C In O .- y E o x E I rn p “!U (ZOOI lso- m- I c ISO/IEC 8877:1992(E) (2010) 6SZ (2110) 19E COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesCEN EN+28877 73 31.104589 0068155 894 = ISO/IEC 8877:1992(E) Dimensions in millimetres linches
32、 in parentheses See note 2 NOTES 1 The 24O min. angle applies or , to plugs with 2 Jack contacts may be rectangular with a width of 0.50 (0.019 5) max. and O,= (0.014) min. ont F -stic walls higher than 4.83 mm (0.190 in). 0,s (0.019 5 1 -tic“- c -c 0,46 (O.Ol81 Figure 4 - Plug/jack contact specific
33、ation 6 COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesCEN EN*28877 93 m 3q04589 0068356 720 m ISO/IEC 8877:1992(E) c .- / I I V c O U - lu 8E00) 160 U!W(OSO 011 Zi V 5“- f a 7 COPYRIGHT European Committee for StandardizationLicensed by Information Handling
34、ServicesCEN EN*28877 93 = 3404589 0068157 667 ISO/IEC 8877:1992(E) Annex A (informative) Interface cabling arrangements1 . The interface cabling arrangements, implied by the requirements in CCITT Recommendation 1.430, section 4 are described in this annex. Figure A.1 illustrates the cabling arrangem
35、ents, for the ISDN basic access interface, and shows the different parts of the physical interconnection: “connecting cordstt, “extension cords“ and “interface cables“. The same contact numbers assigned at the interface (point IA in CCITT Recommendation 1.430, figure Z1.430) of TES for TRANSMIT and
36、RECEIVE conductor pairs are assigned at the interface (point IB in CCIlT Recommendation 1.430, figure 21.430) of NTs for RECEIVE and TRANSMIT respectively, conductor pairs. This provides for a given conductor to be connected to the same contact in jacks at both ends of interface cables. However, it
37、means that interface cables are suitable for NT-to-TE and NT1-to-NT2s interrmnections only. For TE-to-TE interconnections, an adapter with a crossover to connect TRANSMIT to RECEIVE is required. Similar statements apply to contaddmnductors (pairs assigned to contact numbers 1-2 and 7-8) used for opt
38、ional power transfer. As indicated in Recommendation 1.430, section 4, interface cables are terminated in the same type of connector part (jack) at both ends. This means that NTs or TES may be connected at either end of point-to-point cables. Extension cords have a plug at one end and a jack at the
39、other end. They cannot be used to extend TE connecting cords in connections to Passive Bus wiring configurations because the bridging impedance of an extension cord (of even a short length) can adversely affect operation (including that of other TES) in Passive Bus configurations. The length of the
40、extension cord(s) associated with a TE in point-to-point configurations is limited to 25 m. Connecting cords provide a plug for connection to an interface cable (or extension cord). The acceptable maximum length of such cords will generally be limited by the need for compliance with transmit and rec
41、eive-circuit impedance requirements specified in CCITT Recommendation 1.430, section 8. While there is no restriction on the minimum length of such cords in a particular application , TES are required to include a cord of at least 5 m in length . It is also significant that, in most ISDN application
42、s, the interface cable will be users premises wiring and the jack must be available in a form suitable for wall mounting. Available assemblies of the specified jack, which are intended for such mounting, may provide a housing for a suitable mounting of the transmit and receive pair terminating resis
43、tors. As specified in CCIlT Recommendation 1.430, figure Z1.430, the terminating resistors must be located, for point-to-point wiring configurations, in or at the jack and must be connected across contact pairs 4-5 and 3-6. For passive bus wiring configurations, the terminating resistors may be moun
44、ted in such jack assemblies located at the ends of the bus. It is equally important to recognize that the interface cable may be wired directly to NTs without the interface connector and with the interchange circuit terminating resistors provided internal to the equipment. This is possible where the
45、 cable is provided in association with or as part of the NT. In such applications, the only interface of significance (at which the requirements of CCIlT Recommendation 1.430 apply) may be at the jack (point IA in CCITT Recommendation 1.430, figure Zi.430) for the connection of TES . In addition, th
46、e combination of the NT connecting cord and interface cabling may be of zero length. Another alternative NT connection arrangement uses a jack mounted on the NT equipment entity, which includes the terminating resistors. The jack may not conform to this Intemational Standard, but where the jack does
47、 conform, the contact assignments shall be as specified. Where a cord, terminated at each end with a plug, is used to connect Interface cabling arrangements may be the subject of national regulations 8 COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesCEN ENr28
48、877 93 3404589 0068158 5T3 ISO/IEC 8877: 1992( E) TE to the interface wiring, the cord is considered a part of such wiring. For NT2s (e.g., PABX) serving multiple TES, multiple interface cables may be connected to the NT2 with a larger connector, which does not conform to this International Standard
49、. - . a 8 T .i T I. *e e* -0 e. J. e .J NT . - . 1 -L I I I l . 8-4 e TE Je *. 1 . I - 8, I I I u I - N 0 I 5 El u Ln - Interface , cabling Figure A.l - Cabling and connector arrangements a. 0. TE J* *e 9 NOTES 1 The interface cable is usually users premises wiring COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesCEN ENm28877 93 3404589 0068157 43T ISO/IEC 8877: 1992 (E) Annex B (informative) Optional powering provisions CCIlT Recommendation 1.430, section 9, recognizes two meth
