Recommendation ITU-T L.109 (01/2024) Construction of optical/metallic hybrid cables
Summary
History
FOREWORD
Table of Contents
1 Scope
2 References
3 Definitions
     3.1 Terms defined elsewhere
     3.2 Terms defined in this Recommendation
4 Abbreviations and acronyms
5 Conventions
6 Optical/metallic hybrid cable construction
     6.1 Characteristics of each medium
          6.1.1 Optical fibre
          6.1.2 Metallic wires for telecommunication
               6.1.2.1 Symmetrical metallic pair
               6.1.2.2 Coaxial conductors
          6.1.3 Power-feeding wires
     6.2 Cable element
          6.2.1 Tight secondary coating or buffer
          6.2.2 Loose tube
          6.2.3 Micromodule
          6.2.4 Symmetrical pair unit
          6.2.5 Coaxial unit
          6.2.6 Power-feeding wire unit
          6.2.7 Slotted core
          6.2.8 Strength member
          6.2.9 Filler (optional)
          6.2.10 Water blocking material (optional)
          6.2.11 Ripcord (optional)
          6.2.12 Inner sheath (optional)
          6.2.13 Screen of the cable core (optional)
          6.2.14 Armouring layer (optional)
          6.2.15 Outer sheath
          6.2.16 Cable and cable elements marking
     6.3 Mechanical characteristics
     6.4 Environmental conditions
     6.5 Fire safety
     6.6 Electrical characteristics and electromagnetic compatibility
7 Test methods
     7.1 Mechanical test methods
     7.2 Environmental test methods
     7.3 Cable element test methods
     7.4 Electrical characteristic test methods
     7.5 Transmission characteristic test methods
     7.6 Electromagnetic compatibility
Appendix I  Chinese experience
     I.1 Introduction
     I.2 Cable structure
     I.3 Requirements
          I.3.1 Optical fibre
          I.3.2 Symmetrical pair
          I.3.3 Power unit
Appendix II  Chinese experience on hybrid cable for mobile communications in an access network
     II.1 Introduction
     II.2 Background to the distributed base station
          II.2.1 Traditional centralized base station
          II.2.2 First generation distributed base station
          II.2.3 Second generation distributed base station
          II.2.4 The topology of a distributed base station
     II.3 The integrated solution of distributed base station via DC centralized remote power supply
          II.3.1 DC remote power supply solution for DBS
          II.3.2 DC remote power supply unit of a distributed base station
          II.3.3 Direct current remote power supply circuit diagram
          II.3.4 Copper conductor design
          II.3.5 Aluminium conductor design
          II.3.6 Hybrid optical and electrical cable design
               II.3.6.1 Design principles
               II.3.6.2 Design example
     II.4 Conclusion
Appendix III  French/Polish experience
     III.1 Introduction
     III.2 Cable design
Appendix IV  Swiss experience
     IV.1 Introduction
     IV.2 Cable design
     IV.3 Application
     IV.4 Conclusion
Bibliography