Rec. ITU-T G.955 (03/1993) … DIGITAL LINE SYSTEMS BASED ON THE 1544 kbit/s AND THE 2048 kbit/s HIERARCHY ON OPTICAL FIBRE ...
FOREWORD
CONTENTS
1 General
2 Type of transmission medium
3 System margin
    3.1 Cable margin (Mc)
    3.2 Equipment margin (Me)
4 System specifications
    4.1 Regenerator section lengths
    4.2 Error performance
    4.3 Receiver dynamic range
    4.4 Optical source
    4.5 Operating wavelength range
    4.6 Optical path allowances for multimode fibre systems
    4.7 Optical path allowances for single-mode fibre systems
    4.8 Equipment margin (Me)
    4.9 Wavelength division multiplexing
5 Power feeding
6 Systems for short haul applications
7 Working conditions
8 Overall design features
9 Maintenance strategy
    9.1 Type of supervision and fault location
    9.2 Fault conditions and consequent actions
10 Safety considerations
Appendix I … Calculation of regenerator section length
I.1 Approaches
I.2 Statistical data form
I.3 Examples
I.4 An example of a statistical optical power budget