CCITT Rec. G.961 (11/1998) – Digital transmission system on metallic local
lines for ISDN basic rate access
1 General
1.1 Scope
1.2 Definition
1.3 Objectives
1.4 Abbreviations
2 Functions
2.1 B-channel
2.2 D-channel
2.3 Bit timing
2.4 Octet timing
2.5 Frame alignment
2.6 Activation from LT or NT1
2.7 Deactivation
2.8 Power feeding
2.9 Operations and maintenance
3 Transmission medium
3.1 Description
3.2 Minimum ISDN requirements
3.3 DLL physical characteristics
3.4 DLL electrical characteristics
4 System performance
4.1 Performance requirements
4.2 Performance measurements
5 Transmission method
6 Activation/deactivation
6.1 General
6.2 Physical representation of signals
7 Operation and maintenance
7.1 Operation and maintenance functions
7.2 CL channel
7.3 Transfer mode of operation and maintenance links
8 Power feeding
8.1 General
8.2 Power feeding options
8.3 Power feeding and recovery methods
8.4 DLL resistance
8.5 Wetting current
8.6 LT aspects
8.7 Power requirements of NT1 and regenerator
8.8 Current transient limitation
9 Environmental conditions
9.1 Climatic conditions
9.2 Protection
9.3 Electromagnetic compatibility
ANNEX A (to Recommendation G.961) – General structure for an Appendix on
electrical characteristics
A.0 Electrical characteristics
A.1 Line code
A.2 Symbol rate
A.3 Frame structure
A.4 Frame word
A.5 Frame alignment procedure
A.6 Multiframe
A.7 Frame offset between LT-NT1 and NT1-LT frames
A.8 CL channel
A.9 Scrambling
A.10 Activation/deactivation
A.11 Jitter
A.12 Transmitter output characteristics of NT1 and LT
A.13 Transmitter/receiver termination
APPENDIX 1 (to Recommendation G.961) – Electrical characteristics of an MMS 43
transmission system
I.1 Line code
I.2 Symbol rate
I.3 Frame structure
I.4 Frame word
I.5 Frame alignment procedure
I.6 Multiframe
I.7 Frame offset at NT1
I.8 CL-channel
I.9 Scrambling
I.10 Activation/deactivation
I.11 Jitter
I.12 Transmitter output characteristics
I.13 Transmitter/receiver termination
APPENDIX II (to Recommendation G.961) – Electrical characteristics of a 2B1Q
transmission system
II.1 Line code
II.2 Line baud rate
II.3 Frame structure
II.4 Frame word
II.5 Frame alignment procedure
II.6 Multiframe
II.7 Frame offset between LT-NT1 and NT1-LT frames
II.8 CL channel
II.9 Scrambling
II.10 Activation/deactivation
II.11 Jitter
II.12 Transmitter output characteristics of NT1 and LT
II.13 Transmitter/receiver termination
APPENDIX III (to Recommendation G.961) – Electrical characteristics of an AMI
transmission system
III.0 General
III.1 Line code
III.2 Symbol rate
III.3 Frame structure
III.4 Frame word
III.5 Frame alignment procedure
III.6 Multiframe
III.7 Frame offset between LT-NT1 and NT1-LT frames
III.8 CL channel
III.9 Scrambling
III.10 Activation/deactivation
III.11 Jitter
III.12 Transmitter output characteristics of NT1 and LT
III.13 Transmitter/receiver termination
APPENDIX IV (to Recommendation G.961) – Electrical characteristics of an AMI
transmission system using a TCM method
IV.1 Line code
IV.2 Symbol rate
IV.3 Frame structure
IV.4 Frame word
IV.5 Frame alignment procedure
IV.6 Multiframe
IV.7 Frame offset between LT-NT1 and NT1-LT frames
IV.8 CL channel
IV.9 Scrambling
IV.10 Activation/deactivation
IV.11 Jitter
IV.12 Transmitter output characteristics of NT1 and LT
IV.13 Transmitter/receiver termination
APPENDIX V (to Recommendation G.961) – A digital line system for ISDN basic
rate access using binary bi-phase line code
V.0 Electrical characteristics
V.1 Line code
V.2 Symbol rate
V.3 Frame structure
V.4 Frame word
V.5 Frame alignment procedure
V.6 Multiframe
V.7 Frame offset between LT-NT1 and NT1-LT frames
V.8 CL channel
V.9 Scrambling
V.10 Activation/deactivation
V.11 Jitter
V.12 Transmitter output characteristics of NT1 and LT
V.13 Transmitted/receiver termination
APPENDIX VI (to Recommendation G.961) – Basic access transmission system using
SU32 line code
VI.0 General
VI.1 Line code
VI.2 Symbol rate
VI.3 Frame structure
VI.4 Frame word
VI.5 Frame alignment procedure
VI.6 Multiframe
VI.7 Frame offset between LT-NT1 and NT1-LT frames
VI.8 CL channel
VI.9 Scrambling
VI.10 Activation/deactivation
VI.11 Jitter
VI.12 Transmitter output characteristic of the NT or LT
VI.13 Transmitter/receiver termination