1、BRITISH STANDARD BS EN 50098-1:1999 Incorporating Amendment No. 1 Customer premises cabling for Information Technology Part 1: ISDN basic access The European Standard EN 50098-1:1998, with the incorporation of amendment A1:2002, has the status of a British Standard ICS 33.080.40; 33.080 BS EN 50098-
2、1:1999 This British Standard, having been prepared under the direction of the DISC Board, was published under the authority of the Standards Committee and comes into effect on 15 April 1999 BSI 16 June 2003 ISBN 0 580 32376 5 National foreword This British Standard is the English language version of
3、 EN 50098-1:1998, including amendment A1:2002 and Corrigendum January 2003. It supersedes BS EN 50098-1:1994 which is withdrawn. CENELEC Corrigendum January 2003 replaces references to EN 50173 by EN 50173-1 throughout the text of this British Standard. The corrigendum also changes a reference in th
4、e scope of the standard. The start and finish of text introduced or altered by amendment is indicated in the text by tags !“. Tags indicating changes to CENELEC text carry the number of the CENELEC amendment. For example, text altered by CENELEC amendment A1 is indicated by !“. The UK participation
5、in its preparation was entrusted to Technical Committee TCT/7, Installation requirements, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or Europe
6、an publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all
7、 the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpret
8、ation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 25 and a back cover. The BSI copyrig
9、ht notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments 14342 16 June 2003 See national forewordEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 50098-1 November 1998 + A1 November 2002 ICS 33.080.40; 33.080 Sup
10、ersedes EN 50098-1:1994 Incorporating corrigendum January 2003 Descriptors: cabling topology, cabling qualification, design requirements, ISDN basic access, ISDN S-bus, requirements for cabling components English version Customer premises cabling for Information Technology Part 1: ISDN basic access
11、(includes amendment A1:2002) Cablages dans les locaux des usagers pour les technologies de linformation Partie 1: Accs de base RNIS (inclut lamendement A1:2002) Informationstechnische Verkabelung von Gebudekomplexen Teil 1: ISDN-Basisanschlu (enthlt nderung A1:2002) This European Standard was approv
12、ed by CENELEC on 1998-10-01. Amendment A1 was approved by CENELEC on 2002-07-02. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists a
13、nd bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the respo
14、nsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Ita
15、ly, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-10
16、50 Brussels 1998 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 50098-1:1998 + A1:2002 EEN 50098-1:1998 BSI 16 June 2003 2 Foreword This second edition of the European Standard has been prepared by CENELEC/TC 215, Electrotechnical
17、aspects of telecommunication equipment. It has been developed with the cooperation of CENELEC/SC 46XC, Multicore, multipair and quad data communication cables, and ETSI/TM3, Architecture, functional requirements and interfaces of transmission networks, under the framework of the Mandates M/212 on “T
18、elecommunication cables and cabling systems” and M/239 on “Air traffic management equipment and systems”. The text of this European Standard was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN 50098-1 on 1998-10-01. This European Standard supersedes EN 50098-1:1994. Th
19、e following dates were fixed: This standard is the first of a series of European Standards for customer premises cabling. EN 50098-1 (this standard) covers customer premises cabling for connection of basic access ISDN equipment. EN 50098-2 covers customer premises cabling for connection of primary a
20、ccess ISDN equipment. Other subjects that are covered by TC 215 are, e.g.: installation aspects of cabling systems; generic cabling systems. The requirements in this standard have been derived from ETS 300 012-1, EN 28877, EN 60603-7-1 and ITU-T 1)Recommendation I.430 (Blue Book). The reader is refe
21、rred to EN 60950-1 for general safety requirements, and to EN 55022 for EMC requirements (see Bibliography). Foreword to amendment A1 This amendment to the European Standard EN 50098-1:1998 was prepared by CENELEC TC 215, Electrotechnical aspects of telecommunication equipment, based upon a proposal
22、 of the ETSI Project Team Digital Terminals and Access, and with the co-operation of ETSI TM6, Access transmission systems on metallic cables. The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as amendment A1 to EN 50098-1:1998 on 2002-07-02. The foll
23、owing dates were fixed: This amendment replaces 6.6 of EN 50098-1:1998 by a generalized specification of the star configuration as another configuration option for dedicated ISDN wiring. latest date by which the EN has to be implemented at national level by publication of an identical national stand
24、ard or by endorsement (dop) 1999-10-01 l a t e s t d a t e b y w h i c h national standards conflicting with the EN have to be withdrawn (dow) 1999-10-01 1) International Telecommunication Union Telecommunications Standardization Sector (formerly CCITT). latest date by which the amendment has to be
25、implemented at national level by publication of an identical national standard or by endorsement (dop) 2003-07-01 latest date by which the national standards conflicting with the amendment have to be withdrawn (dow) 2003-07-01 EN 50098-1:1998 BSI 16 June 2003 3 Contents Page Foreword 2 Introduction
26、5 1S c o p e 5 2 Normative references 5 3 Definitions 5 4 Abbreviations and symbols 6 4.1 Abbreviations 6 4.2 Symbols 7 5 Design requirements 7 5.1 General 7 5.2 Insertion loss 7 5.3 Longitudinal conversion loss 8 5.4 Round trip delay 8 5.5 Power feeding 8 5.6 Electromagnetic environment 9 5.7 Spurs
27、 9 5.8 Near-end crosstalk loss (NEXT) 9 6 Configurations 10 6.1 General 10 6.2 The point-to-point configuration 10 6.3 The short passive bus configuration 10 6.4 The extended passive bus configuration 12 6.5 The Y-configuration 13 6.6 The star configuration 14 6.7 Implementation over generic cabling
28、 systems 15 7 Minimum requirements for components 19 7.1 General 19 7.2 Cables 19 7.3 Terminal cords 19 7.4 Terminating resistors 19 7.5 Telecommunications outlets and joint boxes 19 7.6 Cross-connect products/patch cords 20 8 Cabling qualification 20 8.1 General 20 8.2 Spurs 20 8.3 Cabling integrit
29、y 20 8.4 d.c. loop resistance 21 8.5 d.c. resistance unbalance 21 8.6 Insulation resistance 21 8.7 Insertion loss 21 8.8 Round trip delay 21 8.9 Characteristic impedance 21 8.10 Near end crosstalk loss (NEXT) 21 Page 8.11 Impulsive noise 21 8.12 Bit error rates 21 8.13 Longitudinal conversion loss 2
30、1 Annex A (normative) Characteristics of Category 3 and Category 5 cables 22 Bibliography 254 blankEN 50098-1:1998 BSI 16 June 2003 5 Introduction This European Standard is intended for use by those designing, planning or procuring cabling for ISDN basic access within a customers premises. The confi
31、gurations in this standard are designed to be effective when either implemented with cabling having the recommended characteristics, or implemented with the components specified in Clause 7. In addition, guidance is given for the use of generic cabling according to EN 50173-1. 1 Scope This European
32、Standard defines the requirements for the design and configuration of customer premises cabling for the connection of basic access ISDN equipment. It defines: design requirements for ISDN basic access with point-to-point and point-to-multipoint cabling configurations; minimum cabling requirements fo
33、r the installation of new cabling; criteria for the use of generic cabling; criteria for the use of existing cabling. The standard applies to the customer premises cabling. It describes the cabling requirements, needed to transmit ISDN basic access signals as defined by ITU-T Recommendation I.430. T
34、he requirements placed on the customer premises cabling are solely those necessary to enable terminal equipment conforming to ETS 300 012-1 to operate into the Network Termination (NT) via configurations defined in this standard. 2 Normative references This European Standard incorporates by dated or
35、 undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only
36、when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 28877, Information processing systems Interface connector and contact assignments for ISDN basic access interface, located at reference points S and T. (ISO/IEC 8877
37、:1992) EN 50173-1, Information technology Generic cabling systems Part 1: General requirements and office areas. EN 60603-7, Connectors for frequencies below 3 MHz for use with printed boards Part 7: Detail specification for connectors, 8-way, including fixed and free connectors with common mating f
38、eatures. (IEC 60603-7:1996) ITU-T Rec I.430 (Blue Book), ISDN user-network interface Layer 1 recommendations. 3 Definitions The meaning of the term round trip delay can be found in ITU-T Recommendation I.430 (Blue Book), A.2. In clauses referring to generic cabling the definitions of EN 50173-1 appl
39、y. Furthermore, for the purposes of this standard, the following definitions apply. 3.1 cabling the assembly of all cables, connections, patch panels and other passive components which comprise the telecommunications infrastructure 3.2 network termination the functional group on the network side of
40、a user-network interface NOTE A network termination always comprises a transmission part NT1 and optionally a switching part NT2. EN 50098-1:1998 6 BSI 16 June 2003 3.3 power feeding the function which provides for the capability to transfer power across the interface of the NT 3.4 terminal equipmen
41、t the functional group on the user side of a user-network interface NOTE Terminal equipment includes terminal(s), terminal adapter(s) and, if any, NT2 functional group. 4 Abbreviations and symbols 4.1 Abbreviations NOTE The meanings of the abbreviations S, S 0and T conform to ITU-T Recommendation I.
42、430. BD building distributor CD campus distributor FD floor distributor GC generic cabling ISDN integrated services digital network NEXT near-end crosstalk loss NT1 network termination1 NT2 network termination2 S S reference point S 0S 0interface T T reference point TE terminal equipment TR terminat
43、ing resistor EN 50098-1:1998 BSI 16 June 2003 7 4.2 Symbols 5 Design requirements 5.1 General Signals passing between the NT and TE(s) for the various configurations are subject to attenuation, delay and distortion. Cabling components (including extension cords, adapters, cross-connect components, t
44、elecommunications outlets, junction boxes, cables, spurs, etc.) and connected terminals all contribute to these effects. The design requirements for the cabling are dependent on the configuration chosen. 5.2 Insertion loss The insertion loss is measured from the NT to the TR at 96 kHz with 100 sourc
45、e and load impedances. The maximum insertion loss for each configuration is shown in Table 1. Cable Spur/tap with a junction to a cable which is the terminated bus Network Termination Terminating Resistors Telecommunications outlet according to EN 60603-7 Plug according to EN 60603-7 Telecommunicati
46、ons outlet according to EN 50173-1 Plug according to EN 50173-1 EN 50098-1:1998 8 BSI 16 June 2003 Table 1 Maximum insertion loss for each configuration 5.3 Longitudinal conversion loss The longitudinal conversion loss of the cabling shall be equal to, or greater than, 43 dB when measured at 96 kHz.
47、 5.4 Round trip delay The round trip delay introduced by the cabling shall not exceed: a) 2,0 s for the total cabling of both the short passive bus at 96 kHz and the Y-configuration; b) 0,5 s differential round trip delay for the cabling between the first and last telecommunications outlet of the ex
48、tended passive bus. These requirements are illustrated in Figure 1. 5.5 Power feeding The length of the cabling may be limited by the cable resistivity, the number of terminals, their power consumption and the capability of the remote power sources. The loop resistance has to be controlled in order
49、to fulfil the power feeding requirements and to avoid static saturation of inductive components in NT and TEs due to the difference in d.c. resistances of the two wires making up the twisted pair. The d.c. resistance unbalance of the two wires shall not exceed 3 % !(see 10.7.1.3 of EN 300 012-1:2000) “, if the loop resistance is greater than 5 . In the majority of cases power is supplied via the phantom of the transmit and receive pairs. In t
