ITU-T I 430-1995 Basic User-Network Interface - Layer 1 Specification - Integrated Services Digital Network (ISDN) ISDN User-Network Interfaces (Study Group 13) 106 pp《基本用户网络网络界面-一.pdf
《ITU-T I 430-1995 Basic User-Network Interface - Layer 1 Specification - Integrated Services Digital Network (ISDN) ISDN User-Network Interfaces (Study Group 13) 106 pp《基本用户网络网络界面-一.pdf》由会员分享,可在线阅读,更多相关《ITU-T I 430-1995 Basic User-Network Interface - Layer 1 Specification - Integrated Services Digital Network (ISDN) ISDN User-Network Interfaces (Study Group 13) 106 pp《基本用户网络网络界面-一.pdf(106页珍藏版)》请在麦多课文档分享上搜索。
1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU INTEGRATED SERVICES DIGITAL NETWORK (ISDN) ISDN USER-NETWORK INTERFACES 1.430 (1 1/95) BASIC USER-NETWORK INTERFACE - LAYER 1 SPECIFICATION ITU-T Recommendation 1.430 (Previously “CCIlT Recommendation”) ITU-T
2、 RECMNxI.430 95 = 4862593 Ob35348 411 w FOREWORD The ITU-T (Telecommunication Standardization Sector) is a permanent organ of the International Telecommunication Union (ITU). The -T is responsible for studying technical, operating and tariff questions and issuing Recommen- dations on them with a vie
3、w to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets every four years, establishes the topics for study by the -T Study Groups which, in their turn, produce Recommendations on these topics. The approval of Recommendati
4、ons by the Members of the ITU-T is covered by the procedure laid down in WTSC Resolution No. 1 (Helsinki, March 1-12, 1993). ITU-T Recommendation 1.430 was revised by IT-T Study Group 13 (1993-1996) and was approved under the WTSC Resolution No. 1 procedure on the 2nd of November 1995. NOTE In this
5、Recommendation, the expression “Administration” is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. O ITU 1996 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanic
6、al, including photocopying and microfilm, without permission in writing from the ITU. . 1 2 5 6 CONTENTS General . Service characteristics 2.1 Services required from the physical medium 2.2 Service provided to layer 2 . 2.2.1 Transmission capability 2.2.2 Activatioddeactivation . 2.2.3 D-channel acc
7、ess . 2.2.4 Maintenance 2.2.5 Status indication 2.3 Primitives between layer 1 and the other entities . Modes of operation 3.1 Point-to-point operation 3.2 Point-to-multipoint operation . Types of wiring configuration 4.1 Point-to-point configuration . 4.2 Point-to-multipoint configuration . 4.3 Wir
8、ing polarity integrity . 4.4 Location of the interfaces . 4.5 NT and TE associated wiring Functional characteristics . 5.1 5.2 5.3 5.4 5.5 5.6 Interface functions 5.1.1 B-channel 5.1.2 Bit timing 5.1.3 Octet timing 5.1.5 D-channel 5.1.6 D-channel access procedure 5.1.7 Power feeding . 5.1.8 Deactiva
9、tion 5.1.9 Activation Interchange circuits . Connecteddisconnected indication 5.3.1 TES powered across the interface 5.3.2 TES not powered across the interface . 5.3.3 Indication of connection status . Frame structure . 5.4.1 Bit rate 5.4.2 Line code 5.1.4 Frame alignment . Binary organization of th
10、e frame Timing considerations Interface procedures . 6.1 D-channel access procedure . 6.1.1 Interframe (layer 2) time fill . 6.1.2 D-echo channel . 6.1.3 D-channel monitoring . 6.1.4 Priority mechanism . 6.1.5 Collision detection 6.1.6 Priority system Recommendation 1.430 (11/95) Page 1 1 1 1 1 2 2
11、2 2 2 3 3 3 3 3 3 3 3 4 4 4 4 5 5 5 5 5 5 5 5 5 5 6 6 6 6 6 6 8 9 9 9 9 9 9 9 10 10 1 48b32591 Ob15350 0T Page 6.2 Activatioddeactivation . 6.2.1 Definitions . 6.2.2 Signals 6.2.3 Activatioddeactivation procedure for TES . 6.2.4 Activatioddeactivation for NTs 6.2.5 Timer values 6.2.6 Activation time
12、s 6.2.7 Deactivation times . 6.3 Frame alignment procedures . 6.3.1 Frame alignment procedure in the direction NT to TE . 6.3.2 Frame alignment in the direction TE to NT 6.3.3 Multiframing . 6.3.4 S-channel structuring algorithm Idle channel code on the B-channels 6.4 10 10 12 13 15 15 17 17 17 17 1
13、8 18 20 20 7 Layer 1 maintenance 20 Provision for operational and maintenace functions between terminal and NT1 . 20 7.1.1 Introduction . 21 7.1.2 Test loopbacks 21 7.1.3 Codes. message durations. and detection algorithms for a . Q-channel and SC1-subchannel 21 7.1.4 Code priorities for Q-channel an
14、d SC1-subchannel 21 7.1.5 TE-to-NT direction messages (Q bits) 21 7.1.6 NT-to-TE direction messages (SC1 bits) 23 7.1.7 B-channel loopback indications (LBlI, LB2I. LB1/21) 24 7.1.8 Loss-of-received-signal indication (LRS) . 24 7.1 7.1.9 Disruptive NT Operation Indication (DOI) 24 8 Electrical charac
15、teristics . 8.1 Bit rate 8.1.1 Nominal rate 8.1.2 Tolerance . Jitter and bit-phase relationship between TE input and output . 8.2.1 Test configurations 8.2.2 Timing extraction jitter . Total phase deviation input to output 8.2 8.2.3 8.3 NT jitter characteristics . 8.4 Termination of the line . 8.5 T
16、ransmitter output characteristics . 8.5.1 Transmitter output impedance 8.5.2 Test load impedance milse shape and amplitude (binary ZERO) . 8.5.4 milse unbalance . 8.5.6 Unbalance about earth . 8.5.3 8.5.5 Voltage on other test loads (TE only) . 8.6 Receiver input characteristics . 8.6.1 Receiver inp
17、ut impedance . 8.6.2 Receiver sensitivity - Noise and distortion immunity 8.6.3 NT receiver input delay characteristics . 8.6.4 Unbalance about earth . 8.7 8.8 Interconnecting media characteristics . 8.9 Standard ISDN basic access TE cord . Isolation from external voltages . : . 8.10 Longitudinal ou
18、tput voltage 8.11 Electromagnetic compatibility (EMC) 25 25 25 25 25 25 27 27 28 28 28 28 29 29 31 31 31 31 31 33 36 37 37 38 38 38 38 ii Recommendation 1.430 (lV95) ITU-T RECMNtI.430 95 4862573 Ob35353 Tob = 9 Power feeding . 9.1.1 Functions specified at the access leads . 9.1.2 Provision of power
19、sources and sinks . 9.1.3 Power feeding voltage . Power available from NT 9.2.1 Power source 1 normal and restricted mode . 9.2.2 Voltage NT from power source 1 . 9.2.3 Voltage of power source 2 9.2.4 Short circuit protection . Power available at TE . 9.3.2 9.3.3 9.1 Reference configuration 9.2 9.3
20、9.3.1 Power consumption unit . Power source 1 - Phantom powering Power source 2 - Optional third pair . 9.4 PSI current transient . 9.5 TE power consumption . 9.5.1 Power source 1 9.5.2 Power source 2 9.6 Galvanic isolation . 9.7 Limitations on power source and sink during transient condition . 9.7.
21、1 Currentltime limitations for “Es . 9.7.2 Power source switchover time (PSI or PS2) 9.7.3 Other TE requirements 9.7.4 Other power source requirements . PS1 direct current unbalance 9.8.2 9.9.1 Power available from an APS . 9.9.2 APS switch-on time 9.9.3 APS switch-off time 9.9.4 APS power consumpti
22、on when off . 9.9.5 Dynamic behaviour of APS 9.10.1 PS1 restricted mode back-off 9.10.2 PS1 restricted mode power-up 9.10.3 NTl power consumption from APS normal mode . 9.8 9.8.1 TE requirements NT requirements . : . Additional requirements for an auxiliary power supply (APS) 9.9 9.10 Additional req
23、uirements for NT1 restricted mode source for compatibility with an APS . Page 39 39 41 41 41 41 41 42 42 42 42 42 43 43 43 43 43 45 45 46 46 49 49 50 52 53 54 54 54 55 55 55 55 55 55 55 55 10 Interface connector contact assignments 56 Annex A . Wiring configurations and round trip delay consideratio
24、ns used as a basis for electrical Characteristics . 56 A.l Introduction 56 A.2 Wiring configurations . 57 A.2.1 Point-to-multipoint 57 A.2.2 Point-to-point (Figure A.3) . 58 60 Annex B - SDL representation of a possible implementation of the D-channel access Annex C . 61 Annex D . Test configuration
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ITUTI4301995BASICUSERNETWORKINTERFACELAYER1SPECIFICATIONINTEGRATEDSERVICESDIGITALNETWORKISDNISDNUSERNETWORKINTERFACESSTUDYGROUP13106PP

链接地址:http://www.mydoc123.com/p-798454.html