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1、INTERNATIONAL STANDARD ISO/IEC 14709-2 First edition 1998-05 Information technology Configuration of Customer Premises Cabling (CPC) for applications Part 2: Integrated Services Digital Network (ISDN) primary rate Technologies de linformation Configuration du cblage dans les locaux dusagers (CPC) po
2、ur les applications Partie 2: Accs primaire au rseau numrique intgration de services (RNIS) Reference number ISO/IEC 14709-2:1998(E) Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/20
3、07 05:47:40 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 05:47:40 MDTNo reproduction or networking pe
4、rmitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO/IEC 14709-2 First edition 1998-05 Information technology Configuration of Customer Premises Cabling (CPC) for applications Part 2: Integrated Services Digital Network (ISDN) primary rate Technologies de linformation Configuration du c
5、blage dans les locaux dusagers (CPC) pour les applications Partie 2: Accs primaire au rseau numrique intgration de services (RNIS) ISO/IEC 1998 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechan
6、ical, including photocopying and microfilm, without permission in writing from the publisher. ISO/IEC Copyright Office Case postale 56 CH-1211 Genve 20 Switzerland PRICE CODE G For price, see current catalogue Copyright International Organization for Standardization Provided by IHS under license wit
7、h ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 05:47:40 MDTNo reproduction or networking permitted without license from IHS -,-,- 2 14709-2 ISO/IEC:1998 (E) CONTENTS Page FOREWORD .3 INTRODUCTION .4 Clause 1 Scope .5 2 Normative references5 3 Definitions.6 4 Abbrevia
8、tions and symbols6 4.1 Abbreviations.6 4.2 Symbols.7 5 Design requirements .7 5.1 General7 5.2 Insertion loss .7 5.3 Power feeding7 5.4 Electromagnetic environment .8 5.5 Spurs.8 5.6 Near-end crosstalk loss (NEXT) .8 6 Point-to-point configurations8 7 Component requirements within dedicated ISDN cab
9、ling9 7.1 General9 7.2 Cables .9 7.2.1 General9 7.2.2 Characteristic impedance .9 7.2.3 Attenuation.10 7.2.4 Near-end crosstalk (NEXT) loss .10 7.2.5 Insulation resistance 10 7.3 Connectors 10 7.4 Cords.10 8 Implementation over generic cabling systems 10 8.1 General10 8.2 Connection of ISDN primary
10、access to generic cabling .11 8.3 Requirements for ISDN primary access generic cabling adapters12 9 Qualification of existing cabling .12 9.1 General12 9.2 Spurs.13 9.3 Cabling integrity.13 9.4 Characteristic impedance.13 9.5 Insertion loss .13 9.6 Insulation resistance 13 9.7 Near-end crosstalk (NE
11、XT) loss .13 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 05:47:40 MDTNo reproduction or networking permitted without license from IHS -,-,- 14709-2 ISO/IEC:1998 (E) 3 INFORMA
12、TION TECHNOLOGY CONFIGURATION OF CUSTOMER PREMISES CABLING (CPC) FOR APPLICATIONS Part 2: Integrated Services Digital Network (ISDN) primary rate FOREWORD ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for
13、worldwide standardization. National 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 collabora
14、te in fields of mutual interest. 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 JTC 1. Draft International Standar
15、ds adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75% of the national bodies casting a vote. International Standard ISO/IEC 14709-2 has been prepared by Joint Technical Committee ISO/IEC JT
16、C 1: Information technology, Subcommittee SC 25: Interconnection of information technology equipment. This standard specifies Customer Premises Cabling for the connection of customer premises equipment with 1,544 Mbit/s and 2,048 Mbit/s interfaces to ISDN primary access and leased lines. The require
17、ments in this standard are derived from ITU-T I.431 (Blue Book, Volume III) and contain additional requirements as well as modifications of ITU-T I.431 and IEC 60603-7. The reader is referred to IEC 60950 for general safety requirements. Other standards in the series are: ISO/IEC 14709-1:1997, Infor
18、mation technology Customer Premises Cabling (CPC) for applications Part 1: Integrated Services Digital Network (ISDN) basic access ISO/IEC 14763-1:, Information technology Implementation and operation of Customer Premises Cabling Part 1: Administration 1) ISO/IEC 14763-2:, Information technology Imp
19、lementation and operation of Customer Premises Cabling Part 2: Planning and installation of copper cabling 2) ISO/IEC 14763-3:, Information technology Implementation and operation of Customer Premises Cabling Part 3: Acceptance testing for optical cabling 2) ISO/IEC 14763-4:, Information technology
20、Implementation and operation of Customer Premises Cabling Part 4: Testing of balanced copper cabling 2) _ 1) To be published. 2) Under consideration. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for
21、 Resale, 04/19/2007 05:47:40 MDTNo reproduction or networking permitted without license from IHS -,-,- 4 14709-2 ISO/IEC:1998 (E) INTRODUCTION This part of ISO/IEC 14709 is intended for use by those designing, planning, procuring, installing or testing cabling for ISDN primary access within a custom
22、ers premises. The design requirements are specified in clause 5; the minimum requirements for the associated components are specified in clause 7. In addition, guidance is given for the use of generic cabling in accordance with ISO/IEC 11801. Copyright International Organization for Standardization
23、Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 05:47:40 MDTNo reproduction or networking permitted without license from IHS -,-,- 14709-2 ISO/IEC:1998 (E) 5 INFORMATION TECHNOLOGY CONFIGURATION OF CUSTOMER PREMISES CABLING (CPC) FOR A
24、PPLICATIONS Part 2: Integrated Services Digital Network (ISDN) primary rate 1 Scope This part of ISO/IEC 14709 specifies the design and configuration of Customer Premises Cabling for the connection of primary access ISDN equipment. It includes design requirements for ISDN primary access point-to-poi
25、nt configuration; cabling requirements for the installation of new cabling; criteria for the use of existing cabling; criteria for implementation of ISDN primary access on generic cabling systems according to ISO/IEC 11801. This standard applies to the customer premises cabling for the transmission
26、of ISDN primary access signals as defined by ITU-T I.431. The requirements in this standard apply to the cabling for both 1,544 Mbit/s and 2,048 Mbit/s interfaces. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this p
27、art of ISO/IEC 14709. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO/IEC 14709 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated belo
28、w. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 60603-7:1996, 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 features, with asse
29、ssed quality IEC 60807-8:1992, Rectangular connectors for frequencies below 3 MHz Part 8: Detail specification for connectors, four-signal contacts and earthing contacts for cable screen CISPR 22:1997, Information technology equipment Radio disturbance characteristics Limits and methods of measureme
30、nt CISPR 24:1997, Information technology equipment Immunity characteristics Limits and methods of measurement ISO/IEC 11801:1995, Information technology Generic cabling for customer premises ISO/IEC 14709-1:1997, Information Technology Customer Premises Cabling (CPC) for applications Part 1: Integra
31、ted Services Digital Network (ISDN) basic access ITU-T I.431: (Blue Book) Integrated Services Digital Network (ISDN) Primary user-network interface Layer 1 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 N
32、ot for Resale, 04/19/2007 05:47:40 MDTNo reproduction or networking permitted without license from IHS -,-,- 6 14709-2 ISO/IEC:1998 (E) 3 Definitions For the purposes of this part of ISO/IEC 14709 the definitions of ISO/IEC 14709-1 and ISO/ IEC 11801 apply, of which the following are repeated below.
33、 3.1 cable unit single assembly of one or more cable elements usually of the same type or category. The cable unit may have a screen NOTE A binder group is an example of a cable unit. 3.1.8 of ISO/IEC 11801:1995 3.2 channel end-to-end transmission path connecting any two pieces of application-specif
34、ic equipment. Equipment cables and work area cables are included in the channel 3.1.13 of ISO/IEC 11801:1995 3.3 spur multiple appearances of the same conductor or conductors continuing past the point of termination. Otherwise known as bridged taps 4 Abbreviations and symbols 4.1 Abbreviations BDBui
35、lding distributor CDCampus distributor DCDirect current EMCElectromagnetic compatibility FDFloor distributor GCGeneric cabling ISDNIntegrated services digital network NEXT Near-end crosstalk loss NTNetwork termination PBXPrivate branch exchange TETerminal equipment Copyright International Organizati
36、on for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 05:47:40 MDTNo reproduction or networking permitted without license from IHS -,-,- 14709-2 ISO/IEC:1998 (E) 7 4.2 Symbols Cable Network Termination Dedicated cablin
37、g socket Dedicated cabling plug Generic cabling socket Generic cabling plug NT (i.e. telecommunications outlet) 5 Design requirements 5.1 General Signals passing between the NT1/NT2 and TE or signals passing between the NT1 and NT2 are subject to attenuation, distortion and induced noise. These sign
38、als may also cause electromagnetic radiation. Cabling components (including extension cords, adapters, cross- connect components, sockets, junction boxes etc.) and cable all contribute to these effects. 5.2 Insertion loss The insertion loss is measured from the NT1 to the TE, or from NT1 to NT2 at 0
39、,772 MHz with 100 non-reactive source and load impedances for 1,544 Mbit/s transmission rate; 1,024 MHz with 120 non-reactive source and load impedances for 2,048 Mbit/s transmission rate. The maximum insertion loss shall not exceed 6 dB in accordance with the system requirements of ITU-T I.431. 5.3
40、 Power feeding In some cases power can be supplied via the cabling from the TE to the NT1 or from the NT2 to the NT1. In these cases a separate pair dedicated to power feeding is required. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA T
41、echnical Standards 1/9972545001 Not for Resale, 04/19/2007 05:47:40 MDTNo reproduction or networking permitted without license from IHS -,-,- 8 14709-2 ISO/IEC:1998 (E) 5.4 Electromagnetic environment The performance of the ISDN primary access may be degraded by interference from external sources of
42、 electromagnetic radiation (such as motors), and from electrical signals from other applications carried under the same cable sheath. These effects can be minimized by employing good installation practice. The impulsive noise generated by circuits carrying, for instance, analogue telephone signals o
43、r some unbalanced data transmission, can cause interference with signals carried on the ISDN cabling. Interference by crosstalk can be limited by putting pairs or quads for ISDN primary access in separate cables or cable units in the same cable. EMC, emission and immunity to interference from the en
44、vironment also have to be considered. EMC can be improved by screening, balancing of equipment, balance of cabling, filtering or a combination of these. However, all equipment and systems shall meet the requirements of EMC standards. The current relevant standards are CISPR 22 for emission and CISPR
45、 24 for immunity. 5.5 Spurs There shall be no spurs in the ISDN primary access cabling. 5.6 Near-end crosstalk loss (NEXT) The NEXT of the cabling shall be greater than 25 dB at frequencies up to 1,0 MHz in accordance with the Class B link requirements of ISO/IEC 11801 and the system requirements of
46、 ITU-T I.431. 6 Point-to-point configurations Point-to-point configurations are illustrated in figure 1. NT2 NT1 TE NT1 or NT2 d1 TE NT1 or NT2 NT1 or NT2 TE d1 is the distance between the NT1 and the point of connection of the customers terminal equipment. d1 also applies to the distance between NT
47、1 and NT2. Figure 1 Point-to-point configurations Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 05:47:40 MDTNo reproduction or networking permitted without license from IHS -,-,- 14709-2 ISO/IEC:1998 (E) 9 Figure 1 is also relevant for the connection of an NT1 to an NT2. The TE can be connected to the cabling in one of three ways via a plug at the end of a cord connected to the TE; hardwired, e.g. by the use of insulation displacement connectors incorporated in