Table of Contents

Foreword
1 Scope
   1.1 Objectives
2 References
3 Abbreviations
4 Functions
   4.1 B-channel
   4.2 D-channel
   4.3 Bit timing
   4.4 Octet timing
   4.5 Frame alignment
   4.6 Activation from LT or NT1
   4.7 Deactivation
   4.8 Power feeding
   4.9 Operations and maintenance
5 Transmission medium
   5.1 Description
   5.2 Minimum ISDN requirements
   5.3 DLL physical characteristics
   5.4 DLL characteristics
6 System performance
   6.1 Performance requirements
   6.2 Performance measurements
   6.3 Unbalance about earth
7 Transmission method
8 Activation/deactivation
   8.1 General
   8.2 Physical representation of signals
9 Operation and maintenance
   9.1 Operation and maintenance functions
   9.2 C L channel
   9.3 Metallic loop testing
10 Power feeding
   10.1 General
   10.2 Power feeding functions
   10.3 DLL resistance
   10.4 Wetting current
   10.5 LT aspects
   10.6 Power requirements of NT1 and regenerator
   10.7 Current transient limitation
   10.8 DC and low frequency AC termination of NT1 and REG
11 Environmental conditions
   11.1 Climatic conditions
   11.2 Safety
   11.3 Overvoltage protection
   11.4 EMC
Annex A: Definition of a system using 2B1Q line code
      A.1 Line code
      A.2 Line baud rate
      A.3 Frame structure
      A.4 Frame word
      A.5 Frame alignment procedure
      A.6 Multiframe
      A.7 Frame offset between LT to NT1 and NT1 to LT frames
      A.8 C L channel
      A.9 Scrambling
      A.10 Start-up and control
      A.11 Jitter
      A.12 Transmitter output characteristics of NT1, REG and LT
      A.13 Transmitter/receiver termination
Appendix I (to Annex A): Extension functions of the system
           using 2B1Q line code
         I-1 Introduction
         I-2 NT1 Power status bits
         I-3 NTM bit
         I-4 CSO bit
         I-5 UOA bit
         I-6 SAI bit
         I-7 AIB
Appendix II (to Annex A): Discussion of EOC addressing
         II-1 Addresses 1 through 6 (intermediate elements)
         II-2 Action of intermediate elements
         II-3 Action of NT
         II-4 Summary
Annex B: Definition of a system using Modified Monitoring
         State (MMS) 43 line code
      B.1 Line code
      B.2 Symbol rate
      B.3 Frame structure
      B.4 Frame word
      B.5 Frame alignment procedure
      B.6 Multiframe
      B.7 Frame offset at NT1
      B.8 C L channel
      B.9 Scrambling
      B.10 Activation/deactivation
      B.11 Jitter
      B.12 Transmitter output characteristics
      B.13 Transmitter/receiver termination
Appendix III (to Annex B): Extension functions and requirements
             for a line system with MMS43 line code
Annex C: Detailed test cable characteristics
      C.1 Parameters for test cables
      C.2 Impedance plot of test loops
      C.3 Frequency response of test loops
History

Abstract

Work on "further study" items.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	European Telecommunications Standards Institute
Pages
ISBN
Committee	TM 6