Rec. ITU-T L.208 (08/2019) - Requirements for passive optical nodes– Fibre distribution box
Summary
History
FOREWORD
Table of Contents
Introduction
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 Characteristics of fibre distribution boxes
     6.1 General requirements
     6.2 FDB housing
     6.3 FDB fibre management system (organizer system)
          6.3.1 Characteristics of the FDB fibre management system
          6.3.2 Configurations of FDB fibre management system
     6.4 Cable attachment and termination system
7 Performance evaluation test program
8 Sample preparation
Annex A  Performance evaluation criteria
     A.1 Sealing and visual evaluation
          A.1.1 Sealing performance
          A.1.2 Visual examination
     A.2 Optical evaluation
          A.2.1 Change in insertion loss (attenuation) (static optical stability)
          A.2.2 Transient loss (dynamic optical stability)
Annex B  Performance test program for indoor non-temperature controlled and outdoor above ground FDBs
     B.1 Mechanical and sealing evaluation
          B.1.1 Cable retention force (IN and OA)
          B.1.2 Cable bending (IN and OA)
          B.1.3 Cable torsion (IN and OA)
          B.1.4 Impact (IN and OA)
          B.1.5 Temperature cycling (IN and OA)
          B.1.6 Re-entries (IN and OA)
          B.1.7 Salt mist (OA)
          B.1.8 Resistance to aggressive media (OA, as needed)
     B.2 Optical evaluation
          B.2.1 Intervention at a node (IN and OA)
          B.2.2 Vibration (IN and OA)
          B.2.3 Shock (IN and OA)
          B.2.4 Temperature cycling (IN and OA)
Appendix I  Product characterization checklist
Appendix II  Indian experience
     II.1 Introduction
     II.2 Different types of FTDB
     II.3 Attributes of FTDB
Bibliography