1、 National Standard of CanadaCAN/CSA-ISO/IEC 8877:02(ISO/IEC 8877:1992)International Standard ISO/IEC 8877:1992 (second edition, 1992-11-15) has been adopted withoutmodification (IDT) as CSA Standard CAN/CSA-ISO/IEC 8877:02, which has been approved as a NationalStandard of Canada by the Standards Cou
2、ncil of Canada.ISBN 1-55324-871-6 December 2002The Canadian Standards Association (CSA), The Standards Council of Canada is theunder whose auspices this National Standard has been coordinating body of the National Standards system, produced, was chartered in 1919 and accredited by a federation of in
3、dependent, autonomousthe Standards Council of Canada to the National organizations working towards the furtherStandards system in 1973. It is a not-for-profit, development and improvement of voluntarynonstatutory, voluntary membership association standardization in the national interest.engaged in s
4、tandards development and certification The principal objects of the Council are to foster activities. and promote voluntary standardization as a means CSA standards reflect a national consensus of of advancing the national economy, benefiting theproducers and users including manufacturers, health, s
5、afety, and welfare of the public, assisting consumers, retailers, unions and professional and protecting the consumer, facilitating domestic organizations, and governmental agencies. The and international trade, and furthering internationalstandards are used widely by industry and commerce cooperati
6、on in the field of standards.and often adopted by municipal, provincial, and A National Standard of Canada is a standard whichfederal governments in their regulations, particularly has been approved by the Standards Council ofin the fields of health, safety, building and Canada and one which reflect
7、s a reasonableconstruction, and the environment. agreement among the views of a number of capableIndividuals, companies, and associations across individuals whose collective interests provide to theCanada indicate their support for CSAs standards greatest practicable extent a balance ofdevelopment b
8、y volunteering their time and skills to representation of producers, users, consumers, andCSA Committee work and supporting the Associations others with relevant interests, as may be appropriateobjectives through sustaining memberships. The to the subject in hand. It normally is a standardmore than
9、7000 committee volunteers and the 2000 which is capable of making a significant and timelysustaining memberships together form CSAs total contribution to the national interest.membership from which its Directors are chosen. Approval of a standard as a National Standard ofSustaining memberships repre
10、sent a major source of Canada indicates that a standard conforms to theincome for CSAs standards development activities. criteria and procedures established by the StandardsThe Association offers certification and testing Council of Canada. Approval does not refer to theservices in support of and as
11、 an extension to its technical content of the standard; this remains thestandards development activities. To ensure the continuing responsibility of the accreditedintegrity of its certification process, the Association standards-development organization.regularly and continually audits and inspects
12、products Those who have a need to apply standards arethat bear the CSA Mark. encouraged to use National Standards of CanadaIn addition to its head office and laboratory complex whenever practicable. These standards are subject in Toronto, CSA has regional branch offices in major to periodic review;
13、therefore, users are cautioned centres across Canada and inspection and testing to obtain the latest edition from the organizationagencies in eight countries. Since 1919, the preparing the standard.Association has developed the necessary expertise to The responsibility for approving National Standar
14、ds meet its corporate mission: CSA is an independent of Canada rests with theservice organization whose mission is to provide an Standards Council of Canadaopen and effective forum for activities facilitating the 270 Albert Street, Suite 200exchange of goods and services through the use of Ottawa, O
15、ntario, K1P 6N7standards, certification and related services to meet Canadanational and international needs.For further information on CSA services, write toCanadian Standards Association5060 Spectrum Way, Suite 100Mississauga, Ontario, L4W 5N6CanadaAlthough the intended primary application of this
16、Standard is stated in its Scope, it is importantto note that it remains the responsibility of the users to judge its suitability for their particular purpose.Registered trade-mark of Canadian Standards AssociationCAN/CSA-ISO/IEC 8877:02 Basic Access Interface located at reference points S and TInfor
17、mation technology Telecommunications and information exchangebetween systems Interface connector and contact assignments for ISDNDecember 2002 Canadian Standards Association CSA/1CAN/CSA-ISO/IEC 8877:02Information technology Telecommunications andinformation exchange betweensystems Interface connect
18、or andcontact assignments for ISDN BasicAccess Interface located at referencepoints S and TCSA PrefaceStandards development within the Information Technology sector is harmonized with internationalstandards development. Through the CSA Technical Committee on Information Technology (TCIT),Canadians s
19、erve as the Canadian Advisory Committee (CAC) on ISO/IEC Joint Technical Committee 1 onInformation Technology (ISO/IEC JTC1) for the Standards Council of Canada (SCC), the ISO memberbody for Canada and sponsor of the Canadian National Committee of the IEC. Also, as a member of theInternational Telec
20、ommunication Union (ITU), Canada participates in the International Telegraph andTelephone Consultative Committee (ITU-T).This International Standard was reviewed by the CSA TCIT under the jurisdiction of the StrategicSteering Committee on Information Technology and deemed acceptable for use in Canad
21、a. (Acommittee membership list is available on request from the CSA Project Manager.) From time to time,ISO/IEC may publish addenda, corrigenda, etc. The CSA TCIT will review these documents for approvaland publication. For a listing, refer to the CSA Information Products catalogue or CSA Info Updat
22、e orcontact a CSA Sales representative. This Standard has been formally approved, without modification, bythe Technical Committee and has been approved as a National Standard of Canada by the StandardsCouncil of Canada.December 2002 Canadian Standards Association 2002All rights reserved. No part of
23、this publication may be reproduced in any form whatsoever without the priorpermission of the publisher. ISO/IEC material is reprinted with permission. Where the words “thisInternational Standard” appear in the text, they should be interpreted as “this National Standard ofCanada”. Inquiries regarding
24、 this National Standard of Canada should be addressed to Canadian Standards Association 5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N6 1-800-463-6727 416-747-4044www.csa.caISO/IEC 8877:1992(E) NOTE - This Portion of the plug illustrates a structure necessary for securing the cord
25、age and is not pertinent to proper mating with the jack. Figure 1 - Plug - 8 pole Figure 2 - Jack - 8 pole ISO/IEC 8877:1992(E) z u: 2 c L CP n C .- 8 -t E .- - i! 9; E .- - z E c .- : .- c E .- n * 4 U!(600) IZL a1ou aq1 aas ; XWJ (1500) ZEL r I I l 1 -m-L I I - I 0 7 KOLO)L9 z ( ELLO) L8Z I I i L,
26、 1 l/ / 1 - .- w - E L .- E g = m s e c; ;t z m s- * Cu - a 7 . 55 I 2 .- g: I r 7 1 1-1 4 I 1 J - F3;, RN 4m 00: $20 -. - l -P. l %c 19 drrr da 5 ISO/IEC 8877:1992(E) 1 - NOTES . z E - 7 z e z Ln 1 Dimensions in millimetres (inches in parentheses) See note 2 0,5(0.0195) 0103 (0.001) u A . . 7 The 2
27、4O min. angle applies only to plugs with front plastic Walls higher than 4,83 mm (0.790 in). 2 Jack contacts may be rectangular with a width of 0,5O (0.079 5) max. and 0,36 (0.014) min. - Jack contact (0.011) min (0.024) Figure 4 - Plug/jack contact specification ISO/IEC 8877:1992(E) Cu -4-d f” m 0)
28、 Y = 0 a m a - II 2- -s Q! +1 .- - -m E E-Eo .- U- 0 yj ,r 5 +I crogr .- EEL$ z z .m;T Co m m - -4 ao-J t-t3 MN i / 4-m 66 E s N - 6 0 0 z 0 Nu 0 I ri 6 I ISO/IEC 8877:1992(E) Annex A (informative) Interface cabling arrangements! The interface cabling arrangements, implied by the requirements in CCI
29、TT Recommendation 1.430, section 4 are described in this annex. Figure A.l illustrates the cabling arrangements, for the ISDN basic access interface, and Shows the different Parts of the physical interconnection: “connecting Cords”, “extension Cords” and “interface ca bles”. The same contact numbers
30、 assigned at the interface (Point IA in CCITT Recommendation 1.430, figure 2/1.430) of TEs for TRANSMIT and RECEIVE conductor pairs are assigned at the interface (Point IB in CCITT Recommendation 1.430, figure 211.430) of NTs for RECEIVE and TRANSMIT , respectively, conductor pairs. This provides fo
31、r a given conductor to be connected to the same contact in jacks at both ends of interface cables. However, it means that interface cables are suitable for NT-to-TE and NTi-to-NT2s interconnections only. For TE-to-TE interconnections, an adapter with a crossover to connect TRANSMIT to RECEIVE is req
32、uired. Similar Statements apply to contactslconductors (pairs assigned to contact numbers 1-2 and 7-8) used for optional power transfer. As indicated in Recom mendation 1.430, part (jack) at both ends . This means that section 4, interface ca bles are termi nated in the same type of con NTs or TEs m
33、ay be connect .ed at eith er end of Point-to-Point cables. nector Extension Cords have a plug at one end and a jack at the 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 s
34、hort length) tan adversely affect Operation (including that of other TEs) in Passive Bus configurations. The length of the 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 Co
35、rd). The acceptable maximum length of such Cords will generally be limited by the need for compliance with transmit and receive-circuit impedance requirements specified in CCITT Recommendation 1.430, section 8. While there is no restriction on the minimum length required to include a Cord of at leas
36、t 5 m in length . of such Cords in a particular a pplicati on , TEs are lt is also significant that, in most ISDN applications, 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
37、 intended for such mounting, may provide a housing for a suitable mounting of the transmit and receive pair terminating resistors. As specified in CCITT Recommendation 1.430, figure Ul.430, the terminating resistors must be located, for Point-to-Point wiring configurations, in or at the jack and mus
38、t be connected across contact pairs 4-5 and 3-6. For passive bus wiring configurations, the terminating resistors may be mounted in such jack assemblies located at the ends of the bus. lt is equally important to recognize that the interface cable may be wired directly to NTs without the interface co
39、nnector and with the interchange circuit terminating resistors provided internal to the equipment. This is possible where the 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 CCITT Recommendation 1.430
40、apply) may be at the jack (Point IA in CCITT Recommendation 1.430, figure Ul.430) for the connection of TEs . In addition, the 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 enti
41、ty, which includes the terminating resistors. The jack may not conform to this International Standard, but where the jack does 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 subjec
42、t of national regulations 8 ISO/lEC 8877:1992(E) 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. TE
43、 Extension Connector 0 8 0 Point-to-Point 4 81 , interface cable I I 6 I l P J / I L 31 , (sec note 2) Ji f l 1 l3 2 I A-J I 1 I I TE TE TE b 4 , 8 L - v 1 8 0 I 1 0 0 l Ja 0 0 :J 0 0 l 0 i - i I t I I Si I I Q) 4 1 l al IB % l 0 J” . 0 l Interface cabling I I r 8 0 0 I I l J* l l l NOTES I 0 I 8 0
44、IA Extension cord , 8 0 8 0 J” 0 l l i r 0 l (sec note 2) 0 l P 8 0 0 I1 L l l l NT 1 The interface cable is usually users premises wiring 2 Wire pairs connect contact pairs l-2, 3-6, 4-5 and 7-8 3 Not for use on passive bus Key : J = Jack P = Plug Figure A.l - Cabling and connector arrangements 9 I
45、SO/IEC 8877:1992(E) Annex B (informative) Optional powering provisions CCITT Recommendation 1.430, section 9, recognizes two methods of powering TEs from NTs using interface conductors. It also recognizes the use of additional interface conductors for powering NTs or other TEs from TEs. All three po
46、wering provision are optional and the latter provision is, in addition, considered beyond the scope of the Recommendation except with respect to the provision for optional conductors for such use. One method of powering TEs from NTs is the use of the Transmit and Receive pairs in the Phantom mode. T
47、he second method is to use an optional pair assigned to contacts 7-8 at the NTs and TEs. The voltage involved and power available are specified in 1.430, section 9. The powering capability provided for, but not specified in CCITT Recommendation 1.430, is the (optional) use of contact pair 1-2 at NTs
48、 and TEs. This power sourcelsink capability provides for the possibility of powering TEs that accept power on contacts 7-8 in TE-to-TE interconnections with a crossover adapter. lt also permits powering NTs from TEs. Even though it is not specified in CCITT Recommendation 1.430, because of its use i
49、n TE-to-TE interconnections, any power Source provided on contact pair 1-2 should conform to the requirements, specified in CCITT Recommendation 1.430, section 9.2 (see the note to the table). For both optional capabilities for accepting power, contact pairs 7-8 at TEs and 1-2 at NTs, the predominant Source of power may be a power supply separate from either equipment. Many TEs in large buildings tan be expected to be powered by power supplies located in remote wiring closets and common to many TEs. TEs may be designed
